事件处理程序
package csh;
import java.awt.*;
public class handle implements ActionListener{
JFrame j;
JButton k;
JPanel s;
JLabel d;
public handle(){
j=new JFrame("操作窗口");
k=new JButton("确定");
k.addActionListener(this);
s=new JPanel(null);
d=new JLabel();
k.setBounds(150,80,80,40);
d.setBounds(100,200,80,440);
s.add(d);
s.add(k);
j.add(s);
j.setVisible(true);
j.setSize(400,300);
}
public static void main(String args[ ]){
new handle();
}
public void actionPerformed(ActionEvent arg0){
s.setBackground(Color.red);
d.setText("已改变窗口颜色!");
}
}