- 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 win; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class work implements ActionListener { JFrame f; JPanel p; JButton b; JLabel l; public work() { f = new JFrame("lN3"); p = new JPanel(); b = new JButton("599"); b.setBounds(80, 50, 80, 50); b.addActionListener(this); l = new JLabel(); l.setBounds(100,200,50,100); p.add(b); p.add(l); p.setBackground(Color.pink); f.add(p); f.setVisible(true); f.setSize(400, 400); } public static void main(String args[]) { new work(); } public void actionPerformed(ActionEvent e) { p.setBackground(Color.orange); b.setBounds(60, 70, 100, 20); l.setText("Faithful to your heart."); l.setBounds(150, 100, 150,100); } }