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‎Chapter10/Example1/AWTFrameWithAButton.java‎

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// Chapter 10: Example 1
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// illustrate event handling using listener interfaces
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import java.awt.*;
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import java.awt.event.*;
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public class AWTFrameWithAButton extends Frame implements ActionListener, WindowListener
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{
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public static void main(String args[])
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{ // create instance of Frame
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AWTFrameWithAButton frameWithButton = new AWTFrameWithAButton();
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}
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// constructor
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public AWTFrameWithAButton()
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{ // create instance of Button
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Button closeButton = new Button("Close");
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// set FlowLayout as the layout manager
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this.setLayout(new FlowLayout());
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// place Button on Frame instance
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this.add(closeButton);
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// establish size, create title & make it visible
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this.setSize(300,150);
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this.setTitle("AWT Frame With A Button");
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this.setVisible(true);
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// register frame as listener for button event
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closeButton.addActionListener(this);
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// register frame as listener for frame event
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this.addWindowListener(this);
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}
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// actionPerformed is invoked when closeButton is clicked
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public void actionPerformed(ActionEvent e)
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{ shutDown(); }
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// The following 7 methods are required because we implemented WindowListener
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// windowClosing invoked when window closed
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public void windowClosing(WindowEvent event)
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{ shutDown(); }
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public void windowClosed(WindowEvent event){}
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public void windowDeiconified(WindowEvent event){}
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public void windowIconified(WindowEvent event){}
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public void windowActivated(WindowEvent event){}
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public void windowDeactivated(WindowEvent event){}
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public void windowOpened(WindowEvent event){}
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// terminate
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public void shutDown()
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{
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this.dispose();
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System.exit(0);
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}
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}

‎Chapter10/Example2/AWTFrameWithAButton.java‎

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// Chapter 10: Example 2
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// illustrate event handling using an adapter class
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import java.awt.*;
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import java.awt.event.*;
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public class AWTFrameWithAButton extends Frame implements ActionListener
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{
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public static void main(String args[])
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{ // create instance of Frame
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AWTFrameWithAButton frameWithButton = new AWTFrameWithAButton();
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}
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// constructor
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public AWTFrameWithAButton()
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{ // create instance of Button
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Button closeButton = new Button("Close");
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// set FlowLayout as the layout manager
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this.setLayout(new FlowLayout());
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// place Button on Frame instance
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this.add(closeButton);
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// establish size, create title & make it visible
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this.setSize(300,150);
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this.setTitle("AWT Frame With A Button");
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this.setVisible(true);
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// register frame as listener for button event
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closeButton.addActionListener(this);
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// create instance of WindowCloser
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WindowCloser eventHandler = new WindowCloser(this);
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// register WindowCloser as listener for frame event
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this.addWindowListener(eventHandler);
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}
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// actionPerformed is invoked when closeButton is clicked
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public void actionPerformed(ActionEvent e)
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{ shutDown(); }
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public void shutDown()
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{
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this.dispose();
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System.exit(0); // terminate
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}
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}
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// WindowCloser is a subclass of WindowAdapter
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class WindowCloser extends WindowAdapter
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{
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AWTFrameWithAButton frameToClose;
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// constructor populates reference to frame instance
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public WindowCloser(AWTFrameWithAButton frame)
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{ frameToClose = frame;}
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// windowClosing is invoked when window closed
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// this method overrides windowClosing in WindowAdapter
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public void windowClosing(WindowEvent event)
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{ frameToClose.shutDown(); }
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}
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‎Chapter10/Example3/AWTFrameWithAButton.java‎

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// Chapter 10: Example 3
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// illustrate event handling using an anonymous inner class
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import java.awt.*;
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import java.awt.event.*;
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public class AWTFrameWithAButton extends Frame implements ActionListener
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{
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public static void main(String args[])
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{ // create instance of Frame
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AWTFrameWithAButton frameWithButton = new AWTFrameWithAButton();
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}
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// constructor
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public AWTFrameWithAButton()
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{ // create instance of Button
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Button closeButton = new Button("Close");
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// set FlowLayout as the layout manager
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this.setLayout(new FlowLayout());
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// place Button on Frame instance
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this.add(closeButton);
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// establish size, create title & make it visible
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this.setSize(300,150);
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this.setTitle("AWT Frame With A Button");
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this.setVisible(true);
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// register frame as listener for button event
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closeButton.addActionListener(this);
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// create anonymous inner class to handle window closing event
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// register the inner class as a listener with the frame
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this.addWindowListener
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( // begin inner class definition
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new WindowAdapter() // superclass of inner class is WindowAdapter
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{
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public void windowClosing(WindowEvent event)
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{shutDown();} // invoke shutDown in outer class
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}// end of inner class definition
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); // end of argument sent to addWindowListener method
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}
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// actionPerformed is invoked when closeButton is clicked
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public void actionPerformed(ActionEvent e)
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{ shutDown(); }
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public void shutDown()
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{
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this.dispose();
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System.exit(0); // terminate
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}
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}

‎Chapter10/Example4/AWTFrameAndComponents.java‎

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// Chapter 10: Example 4
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// illustrate multiple AWT components
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import java.awt.*;
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import java.awt.event.*;
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public class AWTFrameAndComponents extends Frame implements ActionListener
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{
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// Button & TextField reference variables need class scope
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Button displayButton, clearButton, closeButton;
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TextField messageTextField;
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public static void main(String args[])
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{ // create instance of AWTFrameAndComponents
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AWTFrameAndComponents frameAndCompnents = new AWTFrameAndComponents();
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}
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// constructor
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public AWTFrameAndComponents()
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{ // create Button, Label and TextField instances
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displayButton = new Button("Display");
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clearButton = new Button("Clear");
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closeButton = new Button("Close");
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Label messageLabel = new Label("Message:");
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messageTextField = new TextField(15);
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// create two Panels - default FlowLayout manager
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Panel upperPanel = new Panel();
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Panel lowerPanel = new Panel();
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// add label & textfield to upper panel
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upperPanel.add(messageLabel);
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upperPanel.add(messageTextField);
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// add buttons to lower panel
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lowerPanel.add(displayButton);
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lowerPanel.add(clearButton);
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lowerPanel.add(closeButton);
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// add panels to frame - frame default is BorderLayout
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this.add("North",upperPanel);
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this.add("South",lowerPanel);
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// register frame as event listener with all buttons
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displayButton.addActionListener(this);
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clearButton.addActionListener(this);
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closeButton.addActionListener(this);
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this.setSize(320,150);
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this.setTitle("AWT Frame and Components");
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this.setVisible(true);
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// create anonymous inner class to handle window closing event
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// register the inner class as a listener with the frame
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this.addWindowListener
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( // begin inner class definition
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new WindowAdapter() // superclass of inner class is WindowAdapter
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{
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public void windowClosing(WindowEvent event)
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{shutDown();} // invoke shutDown in outer class
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}// end of inner class definition
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); // end of argument sent to addWindowListener method
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}
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// actionPerformed is invoked when a Button is clicked
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public void actionPerformed(ActionEvent e)
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{ // see which button was clicked
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if(e.getSource() == displayButton)
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displayMessage();
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if(e.getSource() == clearButton)
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clearMessage();
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if(e.getSource() == closeButton)
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shutDown();
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}
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public void displayMessage()
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{ messageTextField.setText("Hello World"); }
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public void clearMessage()
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{ messageTextField.setText(" "); }
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public void shutDown()
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{
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this.dispose();
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System.exit(0); // terminate
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}
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}

‎Chapter10/Example4/AWTFrameWithAButton.java‎

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// Chapter 10: Figure 10-3
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// illustrate Frame with a button
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import java.awt.*;
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import java.awt.event.*;
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public class AWTFrameWithAButton extends Frame implements ActionListener, WindowListener
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{
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public static void main(String args[])
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{ // create instance of Frame
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AWTFrameWithAButton frameWithButton = new AWTFrameWithAButton();
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}
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// constructor
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public AWTFrameWithAButton()
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{ // create instance of Button
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Button closeButton = new Button("Close");
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// BorderLayout is the default layout manager
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// place Button on Frame instance
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this.add(closeButton);
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// establish size, create title & make it visible
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this.setSize(300,150);
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this.setTitle("AWT Frame With A Button");
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this.setVisible(true);
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// register frame as listener for button event
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closeButton.addActionListener(this);
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// register frame as listener for frame event
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this.addWindowListener(this);
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}
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// actionPerformed is invoked when closeButton is clicked
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public void actionPerformed(ActionEvent e)
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{ shutDown(); }
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// The following 7 methods are required because we implemented WindowListener
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// windowClosing invoked when window closed
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public void windowClosing(WindowEvent event)
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{ shutDown(); }
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public void windowClosed(WindowEvent event){}
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public void windowDeiconified(WindowEvent event){}
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public void windowIconified(WindowEvent event){}
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public void windowActivated(WindowEvent event){}
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public void windowDeactivated(WindowEvent event){}
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public void windowOpened(WindowEvent event){}
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// terminate
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public void shutDown()
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{
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this.dispose();
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System.exit(0);
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}
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}

‎Chapter10/Example5/AWTApplet.html‎

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<APPLET
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CODE="AWTApplet.class"
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WIDTH="300" HEIGHT="100"
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>
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</APPLET>

‎Chapter10/Example5/AWTApplet.java‎

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// Chapter 10: Example 5
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// illustrate AWT Applet
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import java.awt.*;
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import java.awt.event.*;
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import java.applet.*;
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public class AWTApplet extends Applet implements ActionListener
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{
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// Button & TextField reference variables need class scope
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Button displayButton, clearButton, closeButton;
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TextField messageTextField;
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// constructor
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public void init()
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{
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// create Button, Label and TextField instances
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displayButton = new Button("Display");
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clearButton = new Button("Clear");
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Label messageLabel = new Label("Message:");
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messageTextField = new TextField(15);
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// create two Panels - default FlowLayout manager
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Panel upperPanel = new Panel();
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Panel lowerPanel = new Panel();
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// add label & textfield to upper panel
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upperPanel.add(messageLabel);
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upperPanel.add(messageTextField);
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// add buttons to lower panel
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lowerPanel.add(displayButton);
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lowerPanel.add(clearButton);
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// add panels to frame - frame default is BorderLayout
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this.add("North",upperPanel);
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this.add("South",lowerPanel);
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// register frame as listener for button events
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displayButton.addActionListener(this);
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clearButton.addActionListener(this);
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}
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// actionPerformed is invoked when a Button is clicked
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public void actionPerformed(ActionEvent e)
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{ // see which button was clicked
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if(e.getSource() == displayButton)
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displayMessage();
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if(e.getSource() == clearButton)
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clearMessage();
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}
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public void displayMessage()
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{ messageTextField.setText("Hello World"); }
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public void clearMessage()
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{ messageTextField.setText(" "); }
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}

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