java计算器源代码

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class Calculator extends JFrame implements ActionListener,KeyListener{
 String s="";//S 控制文本框
 float k=0;//K P 保存值
 float p=0;
 int b=0;//控制运算符号
 JPanel p1=new JPanel();
 JPanel p2=new JPanel();
 JTextField text=new JTextField(10);
 GridLayout gridLayout=new GridLayout();
 JButton bc=new JButton("复位");
 JButton b0=new JButton("0");
 JButton b1=new JButton("1");
 JButton b2=new JButton("2");
 JButton b3=new JButton("3");
 JButton b4=new JButton("4");
 JButton b5=new JButton("5");
 JButton b6=new JButton("6");
 JButton b7=new JButton("7");
 JButton b8=new JButton("8");
 JButton b9=new JButton("9");
 JButton bd=new JButton(".");
 JButton bj=new JButton("+");

 JButton bji=new JButton("-");
 JButton bs=new JButton("*");
 JButton bchu=new JButton("/");
 JButton bden=new JButton("=");
 private void init(){
  gridLayout.setColumns(4);
  gridLayout.setRows(4);
  gridLayout.setHgap(8);
  gridLayout.setVgap(8);
  text.setHorizontalAlignment(JTextField.RIGHT ); 
  p1.add(text,"West");
  p1.add(bc,"East");
  p2.setLayout(gridLayout);
  p2.add(b7);
  p2.add(b8);
  p2.add(b9);
  p2.add(bchu);
  p2.add(b4);
  p2.add(b5);
  p2.add(b6);
  p2.add(bs);
  p2.add(b1);
  p2.add(b2);
  p2.add(b3);
  p2.add(bji);
  p2.add(b0);
  p2.add(bd);
  p2.add(bj);
  p2.add(bden);