Java开发网 - 大家帮忙看看我这个JComboBox的itemStateChanged事件怎么被执行了2次

Topic: 大家帮忙看看我这个JComboBox的itemStateChanged事件怎么被执行了2次

1.大家帮忙看看我这个JComboBox的itemStateChanged事件怎么被执行了2次

Posted by: blueman
Posted on: 2004-09-27 18:04

package wzs;

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

public class testComboBox extends JComboBox implements ItemListener{
public testComboBox() {
super();
this.addItem("first");
this.addItem("second");
this.addItemListener(this);
}

public void itemStateChanged(ItemEvent event)
{
if(event.getStateChange() == ItemEvent.SELECTED)
{
System.out.println(event.getStateChange());
}
else
{
System.out.println(event.getStateChange());
}
}

}

2.Re:大家帮忙看看我这个JComboBox的itemStateChanged事件怎么被执行了2次 [Re: blueman]	Copy to clipboard
Posted by: diystar Posted on: 2004-09-29 16:58 一共发生了2个事件，旧的选项DESELECTED，以及新的选项SELECTED