?? timetestwindow.java
字號(hào):
// Demonstrating the Time class set and get methods
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TimeTestWindow extends JFrame {
private Time t;
private JLabel hourLabel, minuteLabel, secondLabel;
private JTextField hourField, minuteField,
secondField, display;
private JButton exitButton;
public TimeTestWindow()
{
super( "Inner Class Demonstration" );
t = new Time();
Container c = getContentPane();
// create an instance of the inner class
ActionEventHandler handler = new ActionEventHandler();
c.setLayout( new FlowLayout() );
hourLabel = new JLabel( "Set Hour" );
hourField = new JTextField( 10 );
hourField.addActionListener( handler );
c.add( hourLabel );
c.add( hourField );
minuteLabel = new JLabel( "Set minute" );
minuteField = new JTextField( 10 );
minuteField.addActionListener( handler );
c.add( minuteLabel );
c.add( minuteField );
secondLabel = new JLabel( "Set Second" );
secondField = new JTextField( 10 );
secondField.addActionListener( handler );
c.add( secondLabel );
c.add( secondField );
display = new JTextField( 30 );
display.setEditable( false );
c.add( display );
exitButton = new JButton( "Exit" );
exitButton.addActionListener( handler );
c.add( exitButton );
}
public void displayTime()
{
display.setText( "The time is: " + t );
}
public static void main( String args[] )
{
TimeTestWindow window = new TimeTestWindow();
window.setSize( 400, 140 );
window.show();
}
// INNER CLASS DEFINITION FOR EVENT HANDLING
private class ActionEventHandler implements ActionListener {
public void actionPerformed( ActionEvent e )
{
if ( e.getSource() == exitButton )
System.exit( 0 ); // terminate the application
else if ( e.getSource() == hourField ) {
t.setHour(
Integer.parseInt( e.getActionCommand() ) );
hourField.setText( "" );
}
else if ( e.getSource() == minuteField ) {
t.setMinute(
Integer.parseInt( e.getActionCommand() ) );
minuteField.setText( "" );
}
else if ( e.getSource() == secondField ) {
t.setSecond(
Integer.parseInt( e.getActionCommand() ) );
secondField.setText( "" );
}
displayTime();
}
}
}
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