testitemevent.java

事件的处理

import java.awt.*;
import java.awt.event.*;
public class TestItemEvent extends Frame implements ItemListener{

  private static TextArea testTA;
 
  public static void main(String args[]){
    TestItemEvent test=new TestItemEvent();
    test.setLayout(new GridLayout(2,1));
    testTA=new TextArea();
    test.add(testTA);
    List testList=new List();
    testList.add("软盘");
    testList.add("硬盘");
    testList.add("磁带");
    testList.add("光盘");
    testList.addItemListener(test);
    test.add(testList);    
    test.setSize(300,200);
    test.setVisible(true);
  }

  public void itemStateChanged(ItemEvent e){
    testTA.append(e.getItem().toString()+"\n");
    testTA.append(((List)e.getItemSelectable()).getSelectedItem()+"\n");
    testTA.append(new Integer(e.getStateChange()).toString()+"\n");
  }

}