Java's Graphical User Interface Toolkit Windows, Applets and all that Swings.

What is Swing? A Swing Tour

The Agenda A Tour of Swing Display A Simple Window from main() Display A Window from an Object Display an Object that is a Window Display an Applet Object Laying out Display Components Making Buttons and Stuff Work

Starting with an Example The Basic Window

The Basic JFrame import javax.swing.*; class BasicJFrame { public static void main(String[] args) { JFrame jf = new JFrame("The Basic JFrame"); jf.setSize(250,250); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); }

The Basic JFrame import javax.swing.*; class BasicJFrame { public static void main(String[] args) { JFrame jf = new JFrame("The Basic JFrame"); jf.setSize(250,250); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); }

jf = new JFrame("The Basic JFrame") Setting the title with the constructor.

jf.setSize(250, 250) 250 pixels 250 pixels

jf.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); Causes the thread for the JFrame to terminate when window closed.

jf.setVisible(true);

Adding The JPanel import javax.swing.*; class DoJPanel { public static void main(String[] args) { JFrame jf = new JFrame("The Basic JFrame"); jf.setSize(250,250); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel jp = new JPanel(); jf.getContentPane().add(jp); jf.setVisible(true); } import javax.swing.*; class DoJPanel { public static void main(String[] args) { JFrame jf = new JFrame("The Basic JFrame"); jf.setSize(250,250); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel jp = new JPanel(); jf.getContentPane().add(jp); jf.setVisible(true); } import javax.swing.*; class BasicJFrame { public static void main(String[] args) { JFrame jf = new JFrame("The Basic JFrame"); jf.setSize(250,250); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); }

jf.getContentPane()

Jpanel jp = new Jpanel(); jf.getContentPane().add(jp);

Top Level Containers JFrame JDialog JApplet JWindow JInternalFrame

How do I Build a Display Object? An Object That Displays a Window

MyWindow public class DoMyWindow { public static void main(String[] args) { new MyWindow(); } public class MyWindow { • }

MyWindow Required but not shown. import javax.swing.*; public class MyWindow { } Required but not shown. import javax.swing.*; import java.awt.event.*;

objects and their references MyWindow public class MyWindow { MyWindow() { } Create all the new GUI objects and their references as members here. Assemble the GUI objects in the constructor.

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.getContentPane().add(jp); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.getContentPane().add(jp); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); }

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); } MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true);

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); } MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true);

MyWindow public class MyWindow { JFrame jf = new JFrame("MyWindow"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true);

How Do I Make an Object Visible? Making an Object Display Itself

A Change in Structure MyWindow MyWindow2 Creates a JFrame Object Fills it With Other GUI Objects Displays the Finished JFrame MyWindow2 Is a JFrame Object Fill Itself With Other GUI Objects MyWindow Displays Itself

MyWindow2 public class DoMyWindow2 { public static void main(String[] args) { new MyWindow2(); } public class MyWindow2 { • }

MyWindow2 public class MyWindow2 extends JFrame { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); jp.add(jtf); setVisible(true); public class MyWindow2 extends JFrame { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); public class MyWindow2 extends JFrame { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); public class MyWindow2 { JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); public class MyWindow2 { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true); public class MyWindow2 { JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); jf.getContentPane().add(jp); jp.add(jtf); jf.setVisible(true);

How Do I Display an Object On the Web? Building an Applet

What the Browser Expects in an Applet public void init() public void start() public void stop() public void destroy() First (one) Time Initialization Called when the Applet becomes visible Called when the Applet becomes hidden Called when Applet is unloaded

MyWindow2 SimpleApplet Required but not shown. import javax.swing.*; public class SimpleApplet extends JApplet { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } public void init() { //setSize(500, 100); //setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); //setVisible(true); public class SimpleApplet extends JApplet { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } public void init() { //setSize(500, 100); //setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); public class SimpleApplet extends JApplet { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } public void init() { //setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); public class SimpleApplet extends JFrame { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); public class MyWindow2 extends JFrame { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); public class SimpleApplet extends JApplet { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } MyWindow2() { setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); public class SimpleApplet extends JApplet { //JFrame jf = new JFrame("MyWindow2"); JMenuBar jmb = new JMenuBar(); JMenu jm = new JMenu("File"); JMenuItem jmi = new JMenuItem("Print Something Cute"); JPanel jp = new JPanel(); JTextField jtf = new JTextField("Try the File Menu"); int count = 0; class DoIt implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println("Something Cute"); jtf.setText("Count = " + ++count); } public void init() { setSize(500, 100); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setJMenuBar(jmb); jmb.add(jm); jm.add(jmi); jmi.addActionListener(new DoIt()); getContentPane().add(jp); add(jtf); setVisible(true); Required but not shown. import javax.swing.*; import java.awt.event.*;

Running The Simple Applet Run the Applet in a JFrame Run the Applet in the Appletviewer Build appropriate html file C:\Chap13>appletviewer SimpleApplet.html Run the Applet in a Web Browser Open html file with Browser

MyWindow2 public class DoMyWindow2 { public static void main(String[] args) { new MyWindow2(); } import javax.swing.*; import java.awt.event.*; public class SimpleApplet extends JApplet { • }

An Applet Display Case import javax.swing.*; public class AppletDisplayCase { public static void main(String[] args) { JFrame jf = new JFrame("Applet Display Case"); jf.setSize(500, 100); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JApplet app = new SimpleApplet(); jf.getContentPane().add(app); app.init(); app.start(); jf.setVisible(true); }

Running The Simple Applet Run the Applet in a JFrame Run the Applet in the Appletviewer Build appropriate html file C:\Chap13>appletviewer SimpleApplet.html Run the Applet in a Web Browser Open html file with Browser

VerySimpleApplet.html <html><head><title>SimpleApplet</title></head> <H3>Demonstrating SimpleApplet</H3> <hr> <APPLET code="SimpleApplet.class" width="500" height="100" align="baseline" codebase="." > No Java 2 support for APPLET!! </APPLET> <hr></body></html>

<html><head><title>SimpleApplet</title></head> <H3>Demonstrating SimpleApplet</H3> <hr> <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="500" height="100" align="baseline" codebase="http://java.sun.com/products/plugin/1.3/ jinstall-13-win32.cab#Version=1,3,0,0"> <PARAM NAME="code" VALUE="SimpleApplet.class"> <PARAM NAME="codebase" VALUE="."> <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3"> <COMMENT> <EMBED type= "application/x-java-applet;version=1.3" code="SimpleApplet.class" codebase="." pluginspage="http://java.sun.com/products/plugin/1.3/ plugin-install.html"> <NOEMBED> </COMMENT> No Java 2 support for APPLET!! </NOEMBED> </EMBED> </OBJECT> <hr></body></html> <html><head><title>SimpleApplet</title></head> <H3>Demonstrating SimpleApplet</H3> <hr> <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="500" height="100" align="baseline" codebase="http://java.sun.com/products/plugin/1.3/ jinstall-13-win32.cab#Version=1,3,0,0"> <PARAM NAME="code" VALUE="SimpleApplet.class"> <PARAM NAME="codebase" VALUE="."> <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3"> <COMMENT> <EMBED type= "application/x-java-applet;version=1.3" code="SimpleApplet.class" codebase="." pluginspage="http://java.sun.com/products/plugin/1.3/ plugin-install.html"> <NOEMBED> </COMMENT> No Java 2 support for APPLET!! </NOEMBED> </EMBED> </OBJECT> <hr></body></html> SimpleApplet.html

<html><head><title>SimpleApplet</title></head> <H3>Demonstrating SimpleApplet</H3> <hr> <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="500" height="100" align="baseline" codebase="http://javaweb.eng/plugin/ jre-1_3-win.exe#Version=1,3,0,0"> <PARAM NAME="code" VALUE="SimpleApplet.class"> <PARAM NAME="codebase" VALUE="."> <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3"> <COMMENT> <EMBED type="application/x-java-applet;version=1.3" width="500" height="100" align="baseline" code="SimpleApplet.class" codebase="." pluginspage="http://javaweb.eng/plugin/plugin-install.html"> <NOEMBED></COMMENT> No JDK 1.3 support for APPLET!! </NOEMBED> </EMBED> </OBJECT> <hr></body></html> <html><head><title>SimpleApplet</title></head> <H3>Demonstrating SimpleApplet</H3> <hr> <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="500" height="100" align="baseline" codebase="http://javaweb.eng/plugin/ jre-1_3-win.exe#Version=1,3,0,0"> <PARAM NAME="code" VALUE="SimpleApplet.class"> <PARAM NAME="codebase" VALUE="."> <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3"> <COMMENT> <EMBED type="application/x-java-applet;version=1.3" width="500" height="100" align="baseline" code="SimpleApplet.class" codebase="." pluginspage="http://javaweb.eng/plugin/plugin-install.html"> <NOEMBED></COMMENT> No JDK 1.3 support for APPLET!! </NOEMBED> </EMBED> </OBJECT> <hr></body></html> SimpleApplet.html

All About Running Applets In a Web Browser http://java.sun.com/products/plugin/1.3/docs/intranet.html http://java.sun.com/products/plugin/1.3/docs/tags.html

Running The Simple Applet Run the Applet in a JFrame Run the Applet in the Appletviewer Build appropriate html file C:\Chap13>appletviewer SimpleApplet.html Run the Applet in a Web Browser Open html file with Browser

C:\Chap13>appletviewer SimpleApplet C:\Chap13>appletviewer SimpleApplet.html or C:\Chap13>appletviewer VerySimpleApplet.html

Running The Simple Applet Run the Applet in a JFrame Run the Applet in the Appletviewer Build appropriate html file C:\Chap13>appletviewer SimpleApplet.html Run the Applet in a Web Browser Open html file with Browser

Applet Limitations Can't Read or Write Local Disk Download Every Use Should package in a .jar file Can only communicate with host that is the source of the Applet.

Applet Strengths Distributes Processing Load to Client No Installation Issues Mistakes can't cause damage to client

How Do I Put Stuff Where I Want It? About Layout Managers

Layout Managers Dynamic A Callback JDK Provides six Layout Managers A method performs positioning A Callback You provide reference to class that implements an interface JDK Provides six Layout Managers FlowLayout GridLayout BorderLayout BoxLayout GridBagLayout Absolute Positioning (null Layout Manager)

FlowLayout class FlowDemo extends JFrame { JPanel jp = new JPanel(new FlowLayout()); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); JButton b6 = new JButton("Button Six"); FlowDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1); jp.add(b2); jp.add(b3); jp.add(b4); jp.add(b5); jp.add(b6); setVisible(true); } Remember Imports: import javax.swing.*; import java.awt.*; public class DoFlowDemo { public static void main(String[] args) { new FlowDemo(); }

GridLayout class GridDemo extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); JButton b6 = new JButton("Button Six"); GridDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1); jp.add(b2); jp.add(b3); jp.add(b4); jp.add(b5); jp.add(b6); setVisible(true); } class GridDemo extends JFrame { JPanel jp = new JPanel(new FlowLayout()); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); JButton b6 = new JButton("Button Six"); FlowDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1); jp.add(b2); jp.add(b3); jp.add(b4); jp.add(b5); jp.add(b6); setVisible(true); } public class DoGridDemo { public static void main(String[] args) { new GridDemo(); }

GridLayout class GridDemo2 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); GridDemo2() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jsp2); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); JButton b6 = new JButton("Button Six"); GridDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1); jp.add(b2); jp.add(b3); jp.add(b4); jp.add(b5); jp.add(b6); setVisible(true); } public class DoGridDemo2 { public static void main(String[] args) { new GridDemo2(); }

GridLayout class GridDemo3 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); //JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); JPanel jp2 = new JPanel(new GridLayout(3,1)); JButton jb1 = new JButton("One"); JButton jb2 = new JButton("Two"); JButton jb3 = new JButton("Three"); GridDemo3() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jp2); jp2.add(jb1); jp2.add(jb2); jp2.add(jb3); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo3 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); JPanel jp2 = new JPanel(new GridLayout(3,1)); JButton jb1 = new JButton("One"); JButton jb2 = new JButton("Two"); JButton jb3 = new JButton("Three"); GridDemo3() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jp2); jp2.add(jb1); jp2.add(jb2); jp2.add(jb3); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo3 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); JPanel jp2 = new JPanel(new GridLayout(3,1)); JButton jb1 = new JButton("One"); JButton jb2 = new JButton("Two"); GridDemo3() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jp2); jp2.add(jb1); jp2.add(jb2); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo3 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); JPanel jp2 = new JPanel(new GridLayout(3,1)); GridDemo3() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jp2); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo3 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); JPanel jp2 = new JPanel(new GridLayout(3,1)); JButton jb1 = new JButton("One"); GridDemo3() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jp2); jp2.add(jb1); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } class GridDemo2 extends JFrame { JPanel jp = new JPanel(new GridLayout(2, 3)); JScrollPane jsp1 = new JScrollPane(new JTextArea()); JScrollPane jsp2 = new JScrollPane(new JTextArea()); JScrollPane jsp3 = new JScrollPane(new JTextArea()); JScrollPane jsp4 = new JScrollPane(new JTextArea()); JScrollPane jsp5 = new JScrollPane(new JTextArea()); JScrollPane jsp6 = new JScrollPane(new JTextArea()); GridDemo2() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(jsp1); jp.add(jsp2); jp.add(jsp3); jp.add(jsp4); jp.add(jsp5); jp.add(jsp6); setVisible(true); } public class DoGridDemo3 { public static void main(String[] args) { new GridDemo3(); }

BorderLayout class BorderDemo extends JFrame { JPanel jp = new JPanel(new BorderLayout()); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); BorderDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1, BorderLayout.CENTER); jp.add(b2, BorderLayout.NORTH); jp.add(b3, BorderLayout.SOUTH); jp.add(b4, BorderLayout.EAST); jp.add(b5, BorderLayout.WEST); setVisible(true); } class GridDemo extends JFrame { JPanel jp = new JPanel(new FlowLayout()); JButton b1 = new JButton("Button One"); JButton b2 = new JButton("Button Two"); JButton b3 = new JButton("Button Three"); JButton b4 = new JButton("Button Four"); JButton b5 = new JButton("Button Five"); JButton b6 = new JButton("Button Six"); FlowDemo() { setSize(500, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); jp.add(b1); jp.add(b2); jp.add(b3); jp.add(b4); jp.add(b5); jp.add(b6); setVisible(true); } public class DoBorderDemo { public static void main(String[] args) { new BorderDemo(); }

What Happens When You Click? Handling GUI Events

DisplayEvents import javax.swing.*; import java.awt.*; import java.awt.event.*; • DisplayEvents

DisplayEvents class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); setVisible(true); } DisplayEvents

DoDisplayEvents public class DoDisplayEvents { public static void main(String[] args) { new DisplayEvents(); }

Run Program > cd Events1 > java DoDisplayEvents

Class ML Implements MouseListener public void mouseClicked(MouseEvent e) { ta.append("mouseClicked - " + e.paramString() + "\n"); } public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {}

Place ML class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); setVisible(true); } class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); setVisible(true); } DisplayEvents Place ML class definition here.

Run Program > cd Events2 > java DoDisplayEvents

Class ML Implements MouseListener public void mouseClicked(MouseEvent e) { ta.append("mouseClicked - " + e.paramString() + "\n"); } public void mouseEntered(MouseEvent e) { ta.append("mouseEntered - " + e.paramString() + "\n"); public void mouseExited(MouseEvent e) { ta.append("mouseExited - " + e.paramString() + "\n"); public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {} class ML implements MouseListener { public void mouseClicked(MouseEvent e) { ta.append("mouseClicked - " + e.paramString() + "\n"); } public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {}

Place new ML class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); setVisible(true); } DisplayEvents No changes needed. Place new ML class definition here.

Run Program > cd Events3 > java DoDisplayEvents

Class ML Implements MouseListener public void mouseClicked(MouseEvent e) { ta.append("mouseClicked - " + e.paramString() + "\n"); } public void mouseEntered(MouseEvent e) { ta.append("mouseEntered - " + e.paramString() + "\n"); public void mouseExited(MouseEvent e) { ta.append("mouseExited - " + e.paramString() + "\n"); public void mousePressed(MouseEvent e) { ta.append("mousePressed - " + e.paramString() + "\n"); public void mouseReleased(MouseEvent e) { ta.append("mouseReleased - " + e.paramString() + "\n"); class ML implements MouseListener { public void mouseClicked(MouseEvent e) { ta.append("mouseClicked - " + e.paramString() + "\n"); } public void mouseEntered(MouseEvent e) { ta.append("mouseEntered - " + e.paramString() + "\n"); public void mouseExited(MouseEvent e) { ta.append("mouseExited - " + e.paramString() + "\n"); public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {}

Place new ML class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); setVisible(true); } DisplayEvents No changes needed. Place new ML class definition here.

Run Program > cd Events4 > java DoDisplayEvents

Class FL Implements FocusListener public void focusGained(FocusEvent e) { ta.append("focusGained - " + e.paramString() + "\n"); } public void focusLost(FocusEvent e) { ta.append("focusLost - " + e.paramString() + "\n");

Add new FL class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); setVisible(true); } class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); jb.addFocusListener( new FL() ); setVisible(true); } DisplayEvents Add new FL class definition here.

Run Program > cd Events5 > java DoDisplayEvents

Class KL Implements KeyListener public void keyPressed(KeyEvent e) { ta.append("keyPressed - " + e.paramString() + "\n"); } public void keyReleased(KeyEvent e) { ta.append("keyReleased - " + e.paramString() + "\n"); public void keyTyped(KeyEvent e) { ta.append("keyTyped - " + e.paramString() + "\n");

Add new KL class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); jb.addFocusListener( new FL() ); setVisible(true); } class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); jb.addFocusListener( new FL() ); jb.addKeyListener( new KL() ); setVisible(true); } DisplayEvents Add new KL class definition here.

Run Program > cd Events6 > java DoDisplayEvents

Class MML Implements MouseMotionListener public void mouseDragged(MouseEvent e) { ta.append("mouseDragged - " + e.paramString() + "\n"); } public void mouseMoved(MouseEvent e) { ta.append("mouseMoved - " + e.paramString() + "\n");

Add new MML class definition here. class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); jb.addFocusListener( new FL() ); jb.addKeyListener( new KL() ); setVisible(true); } class DisplayEvents extends JFrame { JPanel jp = new JPanel( new BorderLayout() ); JTextArea ta = new JTextArea(); JScrollPane jsp = new JScrollPane(ta); JButton jb = new JButton("The Button"); DisplayEvents() { setSize(600, 500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().add(jp); ta.setFont(new Font("SansSerif", Font.PLAIN, 18)); jb.setFont(new Font("SansSerif", Font.PLAIN, 18)); jp.add(jsp, BorderLayout.CENTER); jp.add(jb, BorderLayout.SOUTH); jb.setBackground(Color.yellow); jb.addMouseListener(new ML() ); jb.addFocusListener( new FL() ); jb.addKeyListener( new KL() ); jb.addMouseMotionListener(new MML() ); setVisible(true); } DisplayEvents Add new MML class definition here.

Run Program > cd Events7 > java DoDisplayEvents

Summary Creating A Window to Work With JFrame Applet Positioning Object in the Window Using Layout Managers Laying out Layout Managers ... Capturing and Using User Events Mouse Keyboard

A Postscript

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