完成一个按钮的事件处理程序,实现功能自拟,例如:改变窗口的背景颜色,改变按钮的位置等等
package LL; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class shijian implements ActionListener{ JFrame f; JPanel p; JButton b; JLabel l; public shijian() { f=new JFrame(); p=new JPanel(null); b=new JButton("确定"); l=new JLabel(); b.addActionListener(this); f.add(p); p.add(b); p.add(l); f.setVisible(true); f.setSize(400,400); l.setBounds(50,120,50,50); b.setBounds(150,150,80,80); } public static void main(String[] args) { new shijian(); } public void actionPerformed(ActionEvent e) { p.setBackground(Color.cyan); l.setText("#include哟"); b.setBounds(250,50,80,80); } }