JAVA编写的计算器源代码

package jsq;

import java.awt.Color;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.UIManager;

public class Test implements ActionListener {

/**

*

*/

JFrame f = new JFrame();

JTextField tf = new JTextField("0.");

JMenuBar bar=new JMenuBar();

JMenu menuEdit=new JMenu("编辑(E)");

JMenu menuView=new JMenu("查看(V)");

JMenu menuHelp=new JMenu("帮助(H)");

JMenuItem menuEditCopy=new JMenuItem("复制(C)");

JMenuItem menuEditPaste=new JMenuItem("粘贴(V)");

JMenuItem menuHelpAbout = new JMenuItem("关于计算器(A)");

JPanel panel0 = new JPanel();

JPanel panel2 = new JPanel();

JPanel panel = new JPanel();

JPanel panel3 = new JPanel();

JPanel panel4 = new JPanel();

JPanel panel5 = new JPanel();

JButton btBk = new JButton(" Backspace"); JButton btCe = new JButton("Ce");

JButton btCl = new JButton("C");

JButton bt7 = new JButton("7");

JButton bt8 = new JButton("8");

JButton bt9 = new JButton("9");

JButton btDiv = new JButton("/");

JButton btSqrt = new JButton("sqrt");

JButton bt4 = new JButton("4");

JButton bt5 = new JButton("5");

JButton bt6 = new JButton("6");

JButton btMult = new JButton("*"); JButton btMol = new JButton(" % ");

JButton bt1 = new JButton("1");

JButton bt2 = new JButton("2");

JButton bt3 = new JButton("3");

JButton btMinu = new JButton("-"); JButton btCoun = new JButton(" 1/x");

JButton bt0 = new JButton("0");

JButton btPoint = new JButton("."); JButton btEqual = new JButton("="); JButton btAdd = new JButton("+");

JButton btSign = new JButton(" +/-");

/**

*@param args

*/

public void init(){

f.add(panel0);

f.add(tf,"North");

f.setJMenuBar(bar);

bar.add(menuEdit);

bar.add(menuView);

bar.add(menuHelp);

menuEdit.add(menuEditCopy);

menuEdit.add(menuEditPaste);

menuHelp.add(menuHelpAbout);

tf.setEditable(false);//不可编辑

tf.setHorizontalAlignment(JTextField.RIGHT);//从右侧输入数据panel0.add(panel2);

panel0.add(panel);

panel0.add(panel3);

panel0.add(panel4);

panel0.add(panel5);

panel2.setLayout(new GridLayout(1,4));

panel2.add(btBk);

panel2.add(btCe);

panel2.add(btCl);

panel.setLayout(new GridLayout(1,5));

panel.add(bt7);

panel.add(bt8);

panel.add(bt9);

panel.add(btDiv);

panel.add(btSqrt);//根号

panel3.setLayout(new GridLayout(1,5));

panel3.add(bt4);

panel3.add(bt5);

panel3.add(bt6);

panel3.add(btMult);

panel3.add(btMol);//百分号

panel4.setLayout(new GridLayout(1,5));

panel4.add(bt1);

panel4.add(bt2);

panel4.add(bt3);

panel4.add(btMinu);

panel4.add(btCoun);//倒数

panel5.setLayout(new GridLayout(1,5));

panel5.add(bt0);

panel5.add(btPoint);

panel5.add(btAdd);

panel5.add(btEqual);

panel5.add(btSign);//正负符号