计算器模拟程序的Java代码

计算器模拟程序的Java代码

import java.awt.Button;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Panel;

import java.awt.*;

import java.awt.event.*;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.*;

public class Cal extends JFrame

{

GridLayout gl3;

Panel p0, p3;

JTextField tf1;

JButton b7, b8, b9, b10, b12,b13, b14,b15, b17, b18, b19, b20, b22, b24, b25, b26;

StringBuffer str;// 显示屏所显示的字符串

double x, y;// x和y都是运算数

double sum=0;//加和

double mul=1;//乘积

double sub=0;//减差令其为输入的第一个值

double dev;//除商令其为输入的第一个值

boolean tag= true;

boolean tag1= true;

int z = -1,k;// Z表示单击了那一个运算符.0表示"+",1表示

"-",2表示"*",3表示"/"

//static double m ;// 记忆的数字

public Cal()

{

Container con=getContentPane();

con.setLayout(new FlowLayout());

gl3 = new GridLayout(4, 4, 15, 15);

tf1 = new JTextField(30);// 显示屏

tf1.setHorizontalAlignment(JTextField.RIGHT);

tf1.setEnabled(false);

tf1.setEditable(false);

tf1.setText("0");

tf1.addKeyListener(new Tt());

b7 = new JButton("7");

b7.setForeground(Color.blue);

b7.addActionListener(new Bt());

b8 = new JButton("8");

b8.setForeground(Color.blue);

b8.addActionListener(new Bt());

b9 = new JButton("9");

b9.setForeground(Color.blue);

b9.addActionListener(new Bt());

b10 = new JButton("/");

b10.setForeground(Color.red);

b10.addActionListener(new Bt());

b12 = new JButton("4");

b12.setForeground(Color.blue); b12.addActionListener(new Bt());

b13 = new JButton("5");

b13.setForeground(Color.blue); b13.addActionListener(new Bt());

b14 = new JButton("6");

b14.setForeground(Color.blue); b14.addActionListener(new Bt());

b15 = new JButton("*");

b15.setForeground(Color.red);

b15.addActionListener(new Bt());

b17 = new JButton("1");

b17.setForeground(Color.blue); b17.addActionListener(new Bt());

b18 = new JButton("2");

b18.setForeground(Color.blue); b18.addActionListener(new Bt());

b19 = new JButton("3");

b19.setForeground(Color.blue);

b19.addActionListener(new Bt());

b20 = new JButton("-");

b20.setForeground(Color.red);

b20.addActionListener(new Bt());

b22 = new JButton("0");

b22.setForeground(Color.blue); b22.addActionListener(new Bt());

b24 = new JButton(".");

b24.setForeground(Color.blue); b24.addActionListener(new Bt());

b25 = new JButton("+");

b25.setForeground(Color.red);

b25.addActionListener(new Bt());

b26 = new JButton("=");

b26.setForeground(Color.red);

b26.addActionListener(new Bt());

// 实例化四个面板

p0 = new Panel();

//p1 = new Panel();

//p2 = new Panel();