求JAVA计算器模拟程序源代码

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class testZ extends JFrame implements ActionListener{ private JPanel jPanel1,jPanel2; private JTextField resultField; private JButton s1,s2,s3,s4,s5,s6,s7,s8,s9,s0,b1,b2,b3,b4,f1,f2; private boolean end,add,sub,mul,div; private String str; private double num1,num2; public testZ(){ super("计算器"); setSize(300,240); Container con=getContentPane(); con.setLayout(new BorderLayout()); jPanel1=new JPanel(); jPanel1.setLayout(new GridLayout(1,1)); jPanel2=new JPanel(); jPanel2.setLayout(new GridLayout(4,4)); resultField=new JTextField("0"); jPanel1.add(resultField); con.add(jPanel1,BorderLayout.NORTH); s1=new JButton(" 1 "); s1.addActionListener(this); s2=new JButton(" 2 "); s2.addActionListener(this); s3=new JButton(" 3 "); s3.addActionListener(this); s4=new JButton(" 4 "); s4.addActionListener(this); s5=new JButton(" 5 "); s5.addActionListener(this); s6=new JButton(" 6 "); s6.addActionListener(this); s7=new JButton(" 7 "); s7.addActionListener(this); s8=new JButton(" 8 "); s8.addActionListener(this); s9=new JButton(" 9 "); s9.addActionListener(this); s0=new JButton(" 0 "); s0.addActionListener(this); b1=new JButton(" + "手氏); b1.addActionListener(this); b2=new JButton(" - "); b2.addActionListener(this); b3=new JButton(" * "); b3.addActionListener(this); b4=new JButton("笑灶 / "); b4.addActionListener(this); f1=new JButton(" . "); f1.addActionListener(this); f2=new JButton(" = "碰薯扮); f2.addActionListener(this); jPanel2.add(s1); jPanel2.add(s2); jPanel2.add(s3); jPanel2.add(b1); jPanel2.add(s4); jPanel2.add(s5); jPanel2.add(s6); jPanel2.add(b2); jPanel2.add(s7); jPanel2.add(s8); jPanel2.add(s9); jPanel2.add(b3); jPanel2.add(s0); jPanel2.add(f1); jPanel2.add(f2); jPanel2.add(b4); con.add(jPanel2,BorderLayout.CENTER); }public void num(int i){ String s = null; s=String.valueOf(i); if(end){ //如果数字输入结束，则将文本框置零，重新输入 resultField.setText("0"); end=false; } if((resultField.getText()).equals("0")){ //如果文本框的内容为零，则覆盖文本框的内容 resultField.setText(s); } else{ //如果文本框的内容不为零，则在内容后面添加数字 str = resultField.getText() + s; resultField.setText(str); } } public void actionPerformed(ActionEvent e){ //数字事件 if(e.getSource()==s1) num(1); else if(e.getSource()==s2) num(2); else if(e.getSource()==s3) num(3); else if(e.getSource()==s4) num(4); else if(e.getSource()==s5) num(5); else if(e.getSource()==s6) num(6); else if(e.getSource()==s7) num(7); else if(e.getSource()==s8) num(8); else if(e.getSource()==s9) num(9); else if(e.getSource()==s0) num(0); //符号事件 else if(e.getSource()==b1) sign(1); else if(e.getSource()==b2) sign(2); else if(e.getSource()==b3) sign(3); else if(e.getSource()==b4) sign(4); //等号 else if(e.getSource()==f1){ str=resultField.getText(); if(str.indexOf(".")<=1){ str+="."; resultField.setText(str); } } else if(e.getSource()==f2){ num2=Double.parseDouble(resultField.getText()); if(add){ num1=num1 + num2;} else if(sub){ num1=num1 - num2;} else if(mul){ num1=num1 * num2;} else if(div){ num1=num1 / num2;} resultField.setText(String.valueOf(num1)); end=true; } }public void sign(int s){ if(s==1){ add=true; sub=false; mul=false; div=false; } else if(s==2){ add=false; sub=true; mul=false; div=false; } else if(s==3){ add=false; sub=false; mul=true; div=false; } else if(s==4){ add=false; sub=false; mul=false; div=true; } num1=Double.parseDouble(resultField.getText()); end=true; } public static void main(String[] args){ testZ th1=new testZ(); th1.show(); } }