SwingCodeExamplesNB as a Maven Netbeans Project

SwingCodeExamplesNB/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>javateaching</groupId>
+    <artifactId>SwingCodeExamplesNB</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+</project>

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/BasicGUITest.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import java.awt.FlowLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JRadioButton;
+import javax.swing.JTextField;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class BasicGUITest {
+    public static void main(String[] args)
+    {
+        JFrame ourwindow = new JFrame("Yay! Window");
+        ourwindow.setLayout(new FlowLayout());
+        
+        JLabel label = new JLabel("Enter your name");
+        JTextField text = new JTextField("Bill Bloggs");
+        JCheckBox cbox = new JCheckBox("Enable");
+        
+        JRadioButton rbut = new JRadioButton("Leave");
+        JRadioButton rbut2 = new JRadioButton("Remain");
+        ButtonGroup brexit = new ButtonGroup();
+        brexit.add(rbut);
+        brexit.add(rbut2);
+        
+        String[] comboOptions = {"red","green","blue"};
+        JComboBox comboBox = new JComboBox(comboOptions);
+                
+        JButton buttonOK = new JButton("OK");
+        
+        ourwindow.add(label);
+        ourwindow.add(text);
+        ourwindow.add(cbox);
+        ourwindow.add(rbut);
+        ourwindow.add(rbut2);
+        ourwindow.add(comboBox);
+        ourwindow.add(buttonOK);
+        
+        for (int i = 0; i < 50; i++) ourwindow.add(new JButton("Button"));
+        
+        ourwindow.setSize(600,400);
+        
+        ourwindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        
+        ourwindow.setVisible(true);
+    }
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/BorderLayoutDemo.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import java.awt.BorderLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.WindowConstants;
+
+
+/**
+ *
+ * @author paul
+ */
+public class BorderLayoutDemo 
+{
+    public static void main(String[] args)
+    {
+        JFrame frame = new JFrame("Border Layout");
+        frame.setLayout(new BorderLayout());
+        frame.add(new JButton("North"),BorderLayout.NORTH);
+        frame.add(new JButton("South"),BorderLayout.SOUTH);
+        frame.add(new JButton("East"),BorderLayout.EAST);
+        frame.add(new JButton("West"),BorderLayout.WEST);
+        frame.add(new JButton("Center"),BorderLayout.CENTER);
+               
+        frame.setSize(400,400);
+        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/ComboLayout.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import javateaching.leanconsole.LeanConsole;
+import java.awt.BorderLayout;
+import java.awt.GridLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class ComboLayout 
+{
+    public static void main(String[] args)
+    {
+        JFrame frame = new JFrame("Combo Layout");
+        frame.setLayout(new BorderLayout());
+        frame.add(new JButton("North"),BorderLayout.NORTH);
+        frame.add(new JButton("South"),BorderLayout.SOUTH);
+        frame.add(new JButton("East"),BorderLayout.EAST);
+        frame.add(new JButton("West"),BorderLayout.WEST);
+
+        JPanel middlePanel = new JPanel();
+        middlePanel.setLayout(new GridLayout(2,2));
+        middlePanel.add(new JButton("1"));
+        middlePanel.add(new JButton("2"));
+        middlePanel.add(new JButton("3"));
+        //middlePanel.add(new JButton("4"));
+        
+        LeanConsole gc = new LeanConsole();
+        middlePanel.add(gc);
+        
+        for (int i = 0; i < 100; i++)
+        {
+            gc.println("Hello from the console");
+        }
+        
+        frame.add(middlePanel,BorderLayout.CENTER);
+
+        frame.setSize(400,400);
+        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/Demo.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import javax.swing.JFrame;
+
+/**
+ *
+ * @author paul
+ */
+public class Demo {
+    public static void main(String[] args)
+    {
+        JFrame topwindow = new JFrame("My wonderful window");
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/GridLayoutTest.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import java.awt.GridLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class GridLayoutTest 
+{
+    public static void main(String[] args)
+    {
+        JFrame window = new JFrame("Grid Layout Test");
+        window.setLayout(new GridLayout(6,7));
+        for (int row = 1; row <= 6; row++)
+        {
+            for (int col = 1; col <= 7; col++)
+            {
+                JButton cell = new JButton(col+","+row+" ");
+                window.add(cell);
+            }
+        }
+        window.pack();
+        window.setVisible(true);
+        window.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/LeanGui.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import java.awt.BorderLayout;
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class LeanGui
+{
+    public static void main(String[] args) throws InterruptedException 
+    {
+        JFrame ourwindow = new JFrame("Yay! Window");
+        ourwindow.setLayout(new BorderLayout());
+        JTextArea text = new JTextArea();        
+        text.setLineWrap(true); // otherwise everything is on one line
+        text.setEditable(false); // otherwise people can type over the text
+        ourwindow.add(text,BorderLayout.CENTER);        
+        
+        ourwindow.setSize(500,400);
+        ourwindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        ourwindow.setVisible(true);
+        
+        // the next code is to illustrate "printing"
+        while (true) // repeat forever
+        {
+            String currentText = text.getText();
+            currentText += "Hello! ";
+            text.setText(currentText);
+            Thread.sleep(10); // add a delay just so you can see it build up
+        }
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/basicgui/LeanGuiWithScroll.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.basicgui;
+
+import java.awt.BorderLayout;
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class LeanGuiWithScroll 
+{
+    public static void main(String[] args) throws InterruptedException // needed for Thread.sleep
+    {
+        JFrame ourwindow = new JFrame("Yay! Window");
+        ourwindow.setLayout(new BorderLayout());
+        JTextArea text = new JTextArea();        
+        text.setLineWrap(true); // otherwise everything is on one line
+        text.setEditable(false); // otherwise people can type over the text
+        
+        // JScrollPane gives magical scrollbar powers
+        // We specify the component that we want scrollable
+        // in the JScrollPane constructor
+        JScrollPane scrolly = new JScrollPane(text);                
+        // we add the JScrollPane to our window
+        ourwindow.add(scrolly,BorderLayout.CENTER);        
+        
+        ourwindow.setSize(500,400);
+        ourwindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        ourwindow.setVisible(true);
+        
+        // the next code is to illustrate "printing"
+        while (true) // repeat forever
+        {
+            String currentText = text.getText();
+            currentText += "Hello! ";
+            text.setText(currentText);
+            // below line will make it scroll to the bottom after each
+            // "print"
+            text.setCaretPosition(text.getDocument().getLength());
+            Thread.sleep(10); // add a delay just so you can see it build up
+        }
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/guimoar/FlowLayoutExample.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.guimoar;
+
+import java.awt.FlowLayout;
+import java.awt.Color;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author paulneve
+ */
+public class FlowLayoutExample extends JPanel {
+    
+    private JButton component1 = new JButton("click me");
+    private JLabel component2 = new JLabel("component 2");
+    private JLabel component3 = new JLabel("component 3");
+    private JLabel component4 = new JLabel("component 4");
+    private JLabel component5 = new JLabel("component 5");
+    
+    public FlowLayoutExample()
+    {
+        FlowLayout fl = new FlowLayout();
+        this.setLayout(fl);
+        
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+        
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+        
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+        
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true);
+        
+        this.add(component1);
+        this.add(component2);
+        this.add(component3);
+        this.add(component4);
+        this.add(component5);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/guimoar/GridLayoutExample.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.guimoar;
+
+import java.awt.Color;
+import java.awt.GridLayout;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author paulneve
+ */
+public class GridLayoutExample extends JPanel {
+    
+    private JLabel component1 = new JLabel("component 1",JLabel.CENTER);
+    private JLabel component2 = new JLabel("component 2", JLabel.CENTER);
+    private JLabel component3 = new JLabel("component 3");
+    private JLabel component4 = new JLabel("component 4");
+    private JLabel component5 = new JLabel("<html><h1>component 5 with BIGNESS</h1></html>");
+    private JLabel component6 = new JLabel("component 6");
+    
+    public GridLayoutExample()
+    {
+        GridLayout gl = new GridLayout(0,3);
+        this.setLayout(gl);
+        
+        component1.setBackground(Color.YELLOW);
+        component1.setOpaque(true);
+        
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+        
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+        
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+        
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true);
+        
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+        
+        this.add(component1);
+        this.add(component2);
+        this.add(component3);
+        this.add(component4);
+        this.add(component5);
+        this.add(component6);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/guimoar/GridTo500.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.guimoar;
+
+import java.awt.Color;
+import java.awt.GridLayout;
+import java.util.Random;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author paulneve
+ */
+public class GridTo500 extends JPanel {
+    public GridTo500()
+    {
+        GridLayout gl = new GridLayout(0,15);
+        this.setLayout(gl);
+
+        for (int i = 1; i < 501; i++)
+        {
+            JLabel numberJL = new JLabel(String.valueOf(i+" "));
+            numberJL.setOpaque(true);
+            numberJL.setBackground(Color.getHSBColor(new Random().nextFloat(), 1.0F, 1.0F ));
+            this.add(numberJL);
+        }       
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/guimoar/MixAndMatchDemo.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.guimoar;
+
+/**
+ *
+ * @author paul
+ */
+public class MixAndMatchDemo {
+    public static void main(String[] args)
+    {
+        // shortest program evar :-)
+        MixAndMatchWindow mainwindow = new MixAndMatchWindow();
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/guimoar/MixAndMatchWindow.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.guimoar;
+
+import java.awt.BorderLayout;
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class MixAndMatchWindow extends JFrame 
+{
+    private FlowLayoutExample fl = new FlowLayoutExample();
+    private GridLayoutExample gl = new GridLayoutExample();
+    private GridTo500 g500 = new GridTo500();
+    
+    public MixAndMatchWindow()
+    {
+        super("Demo of mixing and matching layouts with JPanes");
+        this.setLayout(new BorderLayout());                
+        this.add(fl,BorderLayout.NORTH);
+        this.add(gl,BorderLayout.SOUTH);                        
+        
+        // try commenting out this...
+        this.add(g500,BorderLayout.CENTER);
+        
+        // and uncommenting these two...
+        //JScrollPane scrolly = new JScrollPane(g500);
+        //this.add(scrolly,BorderLayout.CENTER);        
+        
+        // and observe the difference!                
+        
+        this.setSize(600,500);
+        this.setVisible(true);
+        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        
+        // also try flipping round the positions of the components and
+        // see how things work out...
+    }    
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/BorderLayoutExample.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class BorderLayoutExample extends JPanel {
+    public BorderLayoutExample()
+    {
+        BorderLayout bl = new BorderLayout();
+        this.setLayout(bl);
+
+        JLabel component1 = new JLabel("component 1",JLabel.CENTER);
+        component1.setBackground(Color.YELLOW);
+        component1.setOpaque(true);
+
+        JLabel component2 = new JLabel("component 2", JLabel.CENTER);
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+
+        JLabel component3 = new JLabel("component 3");
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+
+        JLabel component4 = new JLabel("component 4");
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+
+    /*    JLabel component5 = new JLabel("<html><h1>component 5 with BIGNESS</h1></html>");
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true); */
+       
+        JPanel component5 = new GridTo500();
+        
+        this.add(component1,BorderLayout.NORTH);
+        this.add(component2,BorderLayout.SOUTH);
+        this.add(component3,BorderLayout.EAST);
+        this.add(component4,BorderLayout.WEST);
+        this.add(component5,BorderLayout.CENTER);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/Cat.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+/**
+ *
+ * @author paul
+ */
+public class Cat {
+
+    private String colour;
+    private int numberOfLegs;
+    private int loudnessOfPurr;
+
+    public void purr()
+    {
+        // cat purrs
+    }
+
+    public void inexplicablyScratchYou()
+    {
+        // etc
+    }
+
+    public String getColour()
+    {
+        return colour;
+    }
+
+    public void setColour(String colour)
+    {
+        this.colour = colour;
+    }
+
+    public int getLoudnessOfPurr()
+    {
+        return loudnessOfPurr;
+    }
+
+    public void setLoudnessOfPurr(int loudnessOfPurr)
+    {
+        this.loudnessOfPurr = loudnessOfPurr;
+    }
+
+    public int getNumberOfLegs()
+    {
+        return numberOfLegs;
+    }
+
+    public void setNumberOfLegs(int numberOfLegs)
+    {
+        this.numberOfLegs = numberOfLegs;
+    }
+
+
+
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/CombiningLayouts.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.layoutmanagers;
+
+import java.awt.BorderLayout;
+import java.awt.GridLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class CombiningLayouts {
+    public static void main(String[] args) {
+JFrame frame = new JFrame();
+frame.setLayout(new BorderLayout());
+frame.add(new JButton("North"),BorderLayout.NORTH);
+frame.add(new JButton("South"),BorderLayout.SOUTH);
+frame.add(new JButton("East"),BorderLayout.EAST);
+frame.add(new JButton("West"),BorderLayout.WEST);
+
+JPanel middlePanel = new JPanel();
+middlePanel.setLayout(new GridLayout(2,2));
+middlePanel.add(new JButton("1"));
+middlePanel.add(new JButton("2"));
+middlePanel.add(new JButton("3"));
+middlePanel.add(new JButton("4"));
+frame.add(middlePanel,BorderLayout.CENTER);
+
+frame.setSize(400,400);
+frame.setVisible(true);
+
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    } 
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/ComponentShowcase.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.FlowLayout;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JRadioButton;
+import javax.swing.JTextField;
+
+/**
+ *
+ * @author 
+ */
+public class ComponentShowcase {
+
+    public static void main(String[] args)
+    {
+        // add top level window
+        JFrame ourWindow = new JFrame("Component showcase");
+        // set layout
+        ourWindow.setLayout(new FlowLayout());
+
+        // create components
+        JButton buttonOK = new JButton("OK");
+        JLabel label = new JLabel("Enter your name");
+        JTextField text = new JTextField("Bill Bloggs");
+        JCheckBox chbox = new JCheckBox("Option A");
+        JRadioButton rbut = new JRadioButton("Option 1");
+        JComboBox cbox = new JComboBox(new String [] {"red", "green", "blue"});
+       JList jlist = new JList(new String [] {"red", "green", "blue"});
+
+        // add components
+        ourWindow.add(buttonOK);
+        ourWindow.add(label);
+        ourWindow.add(text);
+        ourWindow.add(chbox);
+        ourWindow.add(rbut);
+        ourWindow.add(cbox);
+       ourWindow.add(jlist);
+        
+
+        // set size
+        ourWindow.setSize(650,60); //ourWindow.pack();
+        // set visibility
+        ourWindow.setVisible(true);
+        ourWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/ConstructorDemo.java

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+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+/**
+ *
+ * @author 
+ */
+public class ConstructorDemo {
+
+    public ConstructorDemo(String msg)
+    {
+        System.out.println("I've been constructed with "+msg);
+    }
+
+    public ConstructorDemo()
+    {
+        this("a default value");
+    }
+
+    public static void main(String[] args)
+    {
+        //ConstructorDemo z = new ConstructorDemo();
+        //ConstructorDemo x = new ConstructorDemo(" an elephant in a bun");
+        File file = new File("test.txt");
+        // original FileReader only code
+        try
+        {
+            BufferedReader bufInput1 =
+                       new BufferedReader(new FileReader(file));
+            String str = bufInput1.readLine();
+            while (str != null)
+            {
+                //students.add(new Student(str));
+                ConstructorDemo c = new ConstructorDemo(str);
+                str = bufInput1.readLine();
+               
+            }
+            bufInput1.close();
+        }
+        catch (Exception ex)
+        {
+            ex.printStackTrace();
+        }
+
+        /*
+        try {
+            InputStreamReader reader =
+                    new InputStreamReader(new FileInputStream("myfile.txt"), "UTF-8");
+            BufferedReader bufInput1 = new BufferedReader(reader);
+        } catch (FileNotFoundException ex) {
+           // do nothing
+        } catch (UnsupportedEncodingException ex)
+        {
+            // do nothing
+        }
+         */
+    }
+
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/Controller.java

@@ -0,0 +1,83 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import javax.swing.JFrame;
+
+/**
+ *
+ * @author 
+ */
+public class Controller implements ActionListener, MouseListener
+{
+    private static Controller oneInstance ;//= new Controller();
+
+    public static Controller getInstance() {
+        if (oneInstance == null){
+            oneInstance = new Controller();
+        }
+        return oneInstance;
+    }
+
+    // singleton pattern
+    private Controller()
+    {
+        
+    }
+
+    public void actionPerformed(ActionEvent ae)
+    {
+       
+        System.out.println(ae.getActionCommand());
+        if (ae.getActionCommand().equals("clickme")) {
+            GridTo500 g500 = new GridTo500();
+            JFrame newWindow = new JFrame("New");
+            newWindow.add(g500);
+            newWindow.setSize(500, 500);
+            newWindow.setVisible(true);
+        }
+        if (ae.getActionCommand().equals("abc"))
+        {
+            System.out.println("hello");
+        }
+    }
+
+//    @Override
+//    public void actionPerformed(ActionEvent ae) {
+//        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+//    }
+
+    @Override
+    public void mouseClicked(MouseEvent me) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void mousePressed(MouseEvent me) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void mouseReleased(MouseEvent me) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void mouseEntered(MouseEvent me) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void mouseExited(MouseEvent me) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/FlowLayoutExample.java

@@ -0,0 +1,54 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.FlowLayout;
+import java.awt.Color;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class FlowLayoutExample extends JPanel {
+    public FlowLayoutExample()
+    {
+        FlowLayout fl = new FlowLayout();
+        this.setLayout(fl);
+
+        /*JLabel component1 = new JLabel("component 1");
+        component1.setBackground(Color.YELLOW);
+        component1.setOpaque(true); */
+
+        JButton component1 = new JButton("click me");
+        component1.setActionCommand("clickme");
+        component1.addActionListener(Controller.getInstance());
+
+        JLabel component2 = new JLabel("component 2");
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+
+        JLabel component3 = new JLabel("component 3");
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+
+        JLabel component4 = new JLabel("component 4");
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+
+        JLabel component5 = new JLabel("component 5");
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true);
+        
+        this.add(component1);
+        this.add(component2);
+        this.add(component3);
+        this.add(component4);
+        this.add(component5);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/GridLayoutExample.java

@@ -0,0 +1,54 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.Color;
+import java.awt.GridLayout;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class GridLayoutExample extends JPanel {
+    public GridLayoutExample()
+    {
+        GridLayout gl = new GridLayout(2,3);
+        this.setLayout(gl);
+
+        JLabel component1 = new JLabel("component 1",JLabel.CENTER);
+        component1.setBackground(Color.YELLOW);
+        component1.setOpaque(true);
+
+        JLabel component2 = new JLabel("component 2", JLabel.CENTER);
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+
+        JLabel component3 = new JLabel("component 3");
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+
+        JLabel component4 = new JLabel("component 4");
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+
+        JLabel component5 = new JLabel("<html><h1>component 5 with BIGNESS</h1></html>");
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true);
+
+        JLabel component6 = new JLabel("component 6");
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+        
+        this.add(component1);
+        this.add(component2);
+        this.add(component3);
+        this.add(component4);
+        this.add(component5);
+        this.add(component6);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/GridTo500.java

@@ -0,0 +1,38 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.Color;
+import java.awt.GridLayout;
+import java.util.Random;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class GridTo500 extends JPanel {
+    public GridTo500()
+    {
+        GridLayout gl = new GridLayout(0,15);
+        this.setLayout(gl);
+
+        for (int i = 1; i < 501; i++)
+        {
+            JLabel numberJL = new JLabel(String.valueOf(i+" "));
+            numberJL.setOpaque(true);
+            numberJL.setBackground(Color.getHSBColor(new Random().nextFloat(), 1.0F, 1.0F ));
+            this.add(numberJL);
+        }
+        JButton button = new JButton("spling");
+       // button.setActionCommand("abc");
+       button.setActionCommand("clickme");
+        button.addActionListener(Controller.getInstance());
+        this.add(button);
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/LayoutManagers.java

@@ -0,0 +1,37 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author 
+ */
+public class LayoutManagers  {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+      //  JPanel jp = new FlowLayoutExample();
+        //JPanel jp = new GridLayoutExample();
+       JPanel jp = new BorderLayoutExample();
+       // JPanel jp = new MigLayoutExample();
+        //JPanel jp = new GridTo500();
+        JFrame mainWindow = new JFrame("Layout Manager Demo");
+        System.out.println(mainWindow);
+        mainWindow.add(jp);
+        mainWindow.pack();
+//        mainWindow.setBounds(50,50,600,600);
+        mainWindow.setVisible(true);
+        Object o = new Object();
+        System.out.println(o.toString());
+        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/MigLayoutExample.java

@@ -0,0 +1,50 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import java.awt.Color;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import net.miginfocom.swing.MigLayout;
+
+/**
+ *
+ * @author 
+ */
+public class MigLayoutExample extends JPanel {
+    private  JLabel component4;
+    public MigLayoutExample()
+    {
+        MigLayout migL = new MigLayout("wrap 2");
+        this.setLayout(migL);
+
+        JLabel component1 = new JLabel("component 1");
+        component1.setBackground(Color.YELLOW);
+        component1.setOpaque(true);
+
+        JLabel component2 = new JLabel("component 2");
+        component2.setBackground(Color.GREEN);
+        component2.setOpaque(true);
+
+        JLabel component3 = new JLabel("component 3");
+        component3.setBackground(Color.ORANGE);
+        component3.setOpaque(true);
+
+        component4 = new JLabel("component 4");
+        component4.setBackground(Color.CYAN);
+        component4.setOpaque(true);
+
+        JLabel component5 = new JLabel("component 5");
+        component5.setBackground(Color.WHITE);
+        component5.setOpaque(true);
+        
+        this.add(component1,"width 70%");
+        this.add(component2,"grow");
+        this.add(component3);
+        this.add(component4);
+        this.add(component5,"span 2, width 100%");
+    }
+}

SwingCodeExamplesNB/src/main/java/javateaching/layoutmanagers/ScrollPaneDemo.java

@@ -0,0 +1,36 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package javateaching.layoutmanagers;
+
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+
+/**
+ *
+ * @author 
+ */
+public class ScrollPaneDemo {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+        //JPanel jp = new FlowLayoutExample();
+        //JPanel jp = new GridLayoutExample();
+        //JPanel jp = new BorderLayoutExample();
+        //JPanel jp = new MigLayoutExample();
+        GridTo500 g500 = new GridTo500();
+        JFrame mainWindow = new JFrame("ScrollPane Manager Demo");
+        JScrollPane js = new JScrollPane(g500);
+        mainWindow.add(js);
+        mainWindow.pack();
+        //mainWindow.setBounds(50,50,600,600);
+        mainWindow.setVisible(true);
+        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+
+}

SwingCodeExamplesNB/src/main/java/javateaching/leanconsole/GCDemo.java

@@ -0,0 +1,43 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.leanconsole;
+
+import java.awt.BorderLayout;
+import javax.swing.JFrame;
+import javax.swing.WindowConstants;
+
+/**
+ *
+ * @author paul
+ */
+public class GCDemo 
+{    
+    public static void main(String[] args) throws InterruptedException
+    {
+        JFrame ourwindow = new JFrame("Yay! Window");
+        ourwindow.setLayout(new BorderLayout());
+        
+        LeanConsoleWithInput console = new LeanConsoleWithInput();        
+        ourwindow.add(console,BorderLayout.CENTER);        
+        
+        ourwindow.setSize(500,400);
+        ourwindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        ourwindow.setVisible(true);
+        
+        console.println("Hello everyone!");
+        
+        for (int i = 1; i <= 200; i++)
+        {
+            console.println("Hello times "+i);
+        }
+        
+        console.println("What is your name?");
+        String name = console.readln();
+        console.println("Hello, "+name);
+        console.println("*** end of program ***");
+    }
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/leanconsole/LeanConsole.java

@@ -0,0 +1,52 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.leanconsole;
+
+import java.awt.BorderLayout;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+
+/**
+ *
+ * @author paul
+ */
+public class LeanConsole extends JPanel
+{
+    private JTextArea textarea = new JTextArea();
+    
+    public LeanConsole()
+    {
+        this.setLayout(new BorderLayout());
+        JScrollPane scroll = new JScrollPane(textarea);
+        this.add(scroll,BorderLayout.CENTER);
+        textarea.setLineWrap(true); // otherwise everything is on one line
+        textarea.setEditable(false); // otherwise people can type over the text
+    }
+    
+    public void print(String text)
+    {
+        String currentText = this.getTextarea().getText();
+        currentText += text;
+        this.getTextarea().setText(currentText);
+        this.getTextarea().setCaretPosition(this.getTextarea().getDocument().getLength());
+    }
+    
+    public void println(String text)
+    {
+        this.print(text+System.getProperty("line.separator"));
+    }
+    
+    public void clear()
+    {
+        this.getTextarea().setText("");
+    }
+
+    public JTextArea getTextarea() {
+        return textarea;
+    }   
+}
+

SwingCodeExamplesNB/src/main/java/javateaching/leanconsole/LeanConsoleWithInput.java

@@ -0,0 +1,101 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package javateaching.leanconsole;
+
+import java.awt.BorderLayout;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+
+/**
+ *
+ * @author paul
+ */
+public class LeanConsoleWithInput extends JPanel
+{
+    private JTextArea textarea = new JTextArea();
+    private JTextField inputfield = new JTextField();
+    
+    private boolean returnPressed = false;
+    
+    public LeanConsoleWithInput()
+    {
+        this.setLayout(new BorderLayout());
+        JScrollPane scroll = new JScrollPane(textarea);
+        this.add(scroll,BorderLayout.CENTER);
+        textarea.setLineWrap(true); // otherwise everything is on one line
+        textarea.setEditable(false); // otherwise people can type over the text
+        // add input field at bottom
+        this.add(inputfield,BorderLayout.SOUTH);
+        inputfield.addKeyListener(new KeyListener(){
+            @Override
+            public void keyTyped(KeyEvent e) {}
+
+            @Override
+            public void keyPressed(KeyEvent e) {}
+
+            @Override
+            public void keyReleased(KeyEvent e) {
+                // while it might seem more natural to hook keyTyped,
+                // apparently getKeyCode only returns values for
+                // keyPressed and keyReleased.
+                if (e.getKeyCode() == KeyEvent.VK_ENTER) returnPressed = true;
+            }        
+        });
+    }
+    
+    public void print(String text)
+    {
+        String currentText = this.getTextarea().getText();
+        currentText += text;
+        this.getTextarea().setText(currentText);
+        this.getTextarea().setCaretPosition(this.getTextarea().getDocument().getLength());
+    }
+    
+    public void println(String text)
+    {
+        this.print(text+System.getProperty("line.separator"));
+    }
+    
+    public String readln()
+    {
+        // clear any existing text
+        inputfield.setText("");
+        // put the cursor in the input field
+        inputfield.requestFocusInWindow();
+        this.returnPressed = false;
+        
+        // returnPressed is going to get set when the
+        // user presses return on the KeyListener for
+        // the input field. We wait until it is...
+        while (!this.returnPressed)
+        {
+            // add in a brief pause to processing. Otherwise this loop would
+            // peg the CPU at 100%
+            try { Thread.sleep(200); } catch (InterruptedException ex) {}
+        }
+        String result = inputfield.getText();
+        // we've pressed return, so clear the field
+        inputfield.setText("");
+        this.returnPressed = false;
+        return result;        
+    }
+    
+    public void clear()
+    {
+        this.getTextarea().setText("");
+    }
+
+    public JTextArea getTextarea() {
+        return textarea;
+    }   
+}
+

SwingCodeExamplesNB/src/main/java/singletonexample/MySingleton.java

@@ -0,0 +1,57 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package singletonexample;
+
+import java.util.ArrayList;
+
+/**
+ *
+ * @author localadmin
+ */
+public class MySingleton {
+       // this is the static attribute which contains the only object of this 
+       // example class. being static it won't get swept up by the garbage collector
+       // it is null before the constructor is called
+    	private static MySingleton uniqueInstance;
+        
+	// instance variables here 
+        // some data for our unique instance object to show you can use it 
+        // to get model data in this case just Strings empty at first but it could be 
+        // Collections of objects or anything
+        private String myUniqueInstanceData;
+       
+ 
+        // this is the way of getting the unique instance 
+        // printlines have been put in to show how it works
+	public static MySingleton getInstance() {
+		if (uniqueInstance == null) {
+                        System.out.println("The uniqueInstance is null.");
+                        System.out.println("Call the constructor");
+			uniqueInstance = new MySingleton();
+		}
+                System.out.println("We have a uniqueInstance so return it");
+		return uniqueInstance;
+	}
+        
+        // the private constructor
+        private MySingleton() {
+        // a print line just to show when the constructor is called 
+        // it is a private constructor and can only be called from the getInstance method
+          System.out.println("Creating our uniqueInstance");
+        }
+        
+	// other useful methods here
+
+        // getters and setters for whatever data we have in our uniqueInstance
+    public String getMyUniqueInstanceData() {
+        return myUniqueInstanceData;
+    }
+
+    public void setMyUniqueInstanceData(String myUniqueInstanceData) {
+        this.myUniqueInstanceData = myUniqueInstanceData;
+    }
+        
+}

SwingCodeExamplesNB/src/main/java/singletonexample/SingletonExample.java

@@ -0,0 +1,37 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package singletonexample;
+
+import java.util.ArrayList;
+
+/**
+ *
+ * @author localadmin
+ */
+public class SingletonExample {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+        // We are going to get our uniqueInstance of a Singleton object
+        System.out.println("First call to get our uniqueInstance");
+        MySingleton theOnlyOne = MySingleton.getInstance();
+        System.out.println("Now I'm going to put some data in and it will be: theOnlyOne");
+        theOnlyOne.setMyUniqueInstanceData("theOnlyOne");
+       // now I am going to retrieve the data
+       System.out.println("Now I want to get  my uniqueInstance again (I can get it from anywhere in my application)");
+       
+       MySingleton theOnlyOneAgain = MySingleton.getInstance();
+       
+       System.out.println("Let's see if it is the same object - what's the data?");
+       
+       System.out.println(theOnlyOneAgain.getMyUniqueInstanceData());
+       
+       System.out.println("Hey man it's the same object! That was easy :-) No more passing the object all over the place. Patterns rule!"); 
+    }
+    
+}