然后，再在派生类中重载dispatchEvent()方法就可以截获所有的系统事件，包括用户输入事件。下面一段代码给出一个操纵EventQueue的实例：
import java.awt.*;
import java.awt.event.*;
public class GenerateEventQueue
extends Frame implements ActionListener
{
Button button1 = new Button();
TextField textField1 = new TextField();
public GenerateEventQueue()
{
try {
jbInit();
}
catch(Exception e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
GenerateEventQueue generateEventQueue
= new GenerateEventQueue();
}
private void jbInit() throws Exception
{
button1.setLabel("button1");
button1.addActionListener(this) ;
textField1.setText("textField1");
this.add(button1,
BorderLayout.SOUTH);
this.add(textField1,
BorderLayout.CENTER);
EventQueue
eq=getToolkit().getSystemEventQueue() ;
eq.postEvent(new ActionEvent(button1,
ActionEvent.ACTION_PERFORMED,"test" )) ;
addWindowListener(new WinListener());
setBounds(100,100,300,200);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
textField1.setText("event is
:"+e.getActionCommand()) ;
}
}
class WinListener extends WindowAdapter
{
public void windowClosing(WindowEvent we)
{
System.exit(0) ;
}
}
运行结果如下图所示：
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