说明: import javax.swing.*; import java.awt.*; import java.awt.event.*; public class Calculator extends JFrame { JButton[] b = new JButton[10]; JPanel panel1 = new JPanel(); // 实例化面板 JPanel panel2 = new JPanel(); JPanel panel3 = new JPanel(); JTextField a
<weixin_45416917> 上传 | 大小:4kb