java计算器 图形用户界面 升级版 v1.02(一)

package com.rgy.entity;

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

@SuppressWarnings("serial")
public class Calculator2 extends JFrame{
	// 声明辅助变量
	private String str = "0";// 保存显示框中的字符串
	private String show_str="";
	private double num_record = 0;// 记录当前数据的值
	private int operator = 0;// 记录当前运算符类型
	private int count_point=0;// 记录小数点个数，避免重复输入小数点
	// 声明并初始化各个组件
	private JTextField text_show = new JTextField("0");
	private JTextField text_show1 = new JTextField();
	private JPanel panel_up = new JPanel();
	private JPanel panel_CEandC = new JPanel();
	private JPanel panel_keys = new JPanel();
	private JButton button_CE = new JButton("CE");
	private JButton button_C = new JButton("C");
	private JButton button_num0 = new JButton("0");
	private JButton button_num1 = new JButton("1");
	private JButton button_num2 = new JButton("2");
	private JButton button_num3 = new JButton("3");
	private JButton button_num4 = new JButton("4");
	private JButton button_num5 = new JButton("5");
	private JButton button_num6 = new JButton("6");
	private JButton button_num7 = new JButton("7");
	private JButton button_num8 = new JButton("8");
	private JButton button_num9 = new JButton("9");
	private JButton button_division = new J





Button("/");
	private JButton button_multiplication = new JButton("*");
	private JButton button_cut = new JButton("-");
	private JButton button_add = new JButton("+");
	private JButton button_equal = new JButton("=");
	private JButton button_point = new JButton(".");

	public Calculator2(String s) {
		super(s);
		this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		this.setBounds(500,250,270,400);
		this.setVisible(true);
		//设置显示框
		text_show.setHorizontalAlignment(JTextField.RIGHT);
		text_show.setFont(new Font("Default", 0, 30));
		text_show.setEditable(false);// 不可编辑
		text_show1.setHorizontalAlignment(JTextField.RIGHT);
		text_show1.setFont(new Font("Default", 0, 16));
		text_show1.setEditable(false);
		// 设置布局及边框
		panel_up.setLayout(new BorderLayout());
		button_CE.setBorder(BorderFactory.createRaisedBevelBorder());
		button_C.setBorder(BorderFactory.createRaisedBevelBorder());
		button_CE.setFont(new Font("Default", 1, 20));
		button_C.setFont(new Font("Default", 1, 20));
		panel_up.setBorder(BorderFactory.createEtchedBorder ());
		panel_CEandC.setLayout(new GridLayout(1, 2, 7, 7));
		panel_keys.setLayout(new GridLayout(4, 4, 7, 7));
		// 面板的嵌套
		panel_up.add(text_show1, BorderLayout.NORTH);
		panel_up.add(text_show, BorderLayout.CENTER);
		panel_up.add(panel_CEandC, BorderLayout.SOUTH);
		this.add(panel_up, BorderLayout.NORTH);
		this.add(panel_keys, BorderLayout.CENTER);
		//在面板上添加按钮
		panel_CEandC.add(button_CE);panel_CEandC.add(button_C);
		panel_keys.add(button_num7);panel_keys.add(button_num8);
		panel_keys.add(button_num9);panel_keys.add(button_division);
		panel_keys.add(button_num4);panel_keys.add(button_num5);
		pa