weixin_45416917的博客

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 answer=new JTextField(10); JButton clear=new JButton("清除"); JButton equal=new JButton("="); JButton point=new JButton("."); JButton plus=new JButton("+"); JButton minus=new JButton("-"); JButton multi=new JButton("×"); JButton division=new JButton("÷"); String foreText=new String(""); String backText=new String(""); String s=new String(); String s1=new String(); Object op=new String(); Object o=new String(); double d, dFore, dBack; int i=9; public static void main(String[] args) { // TODO Auto-generated method stub