actionlistener
package swing;import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
/*
* 动作事件监听器
*
*/
//实现ActionListener接口
public class SimpleEvent2 extends JFrame implements ActionListener{
private JButton a=new JButton("按钮");
public SimpleEvent2(){
setTitle("测试动作监听");
setVisible(true);
setSize(300,300);
Container b=getContentPane();
b.add(a);
a.addActionListener(this);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
}
//重写actionPerformed()
public void actionPerformed(ActionEvent arg0){
a.setText("我被单击了");
}
public static void main(String[] args){
new SimpleEvent2();
}
}
运行结果:
点击之后: