源代码下载地址：http://www.zuidaima.com/share/1550463496948736.htm
用java swing写的简易计算器
/**
*@author www.zuidaima.com
*/
package com.zuidaima.swing;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
import java.awt.event.KeyEvent;
import java.awt.event.InputEvent;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class JSQFrame extends JFrame
{
private JPanel contentPane;
/**
* 计算结果
*/
private JTextField txtJiSuanJieGuo;
/**
* 第一个数
*/
double shuA;
/**
* 第二个数
*/
double shuB;
double shu;
//f
/**
* Launch the application.
*/
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
try
{
JSQFrame frame = new JSQFrame();
frame.setVisible(true);
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public JSQFrame()
{
setResizable(false);
setTitle("\u8BA1\u7B97\u5668");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 362, 347);
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnNewMenu = new JMenu("\u7F16\u8F91(E)");
mnNewMenu.setMnemonic('E');
menuBar.add(mnNewMenu);
JMenuItem mntmNewMenuItem = new JMenuItem("\u590D\u5236(C)");
mntmNewMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK));
mnNewMenu.add(mntmNewMenuItem);
JMenuItem mntmNewMenuItem_1 = new JMenuItem("\u7C98\u8D34(V)");
mntmNewMenuItem_1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK));
mnNewMenu.add(mntmNewMenuItem_1);
JMenu mnNewMenu_1 = new JMenu("\u67E5\u770B");
menuBar.add(mnNewMenu_1);
JMenuItem mntmNewMenuItem_3 = new JMenuItem("\u6807\u51C6\u578B(T)");
mntmNewMenuItem_3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_T, 0));
mnNewMenu_1.add(mntmNewMenuItem_3);
JMenuItem mntmNewMenuItem_4 = new JMenuItem("\u79D1\u5B66\u578B(S)");
mntmNewMenuItem_4.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, 0));
mnNewMenu_1.add(mntmNewMenuItem_4);
JSeparator separator_1 = new JSeparator();
mnNewMenu_1.add(separator_1);
JMenuItem mntmNewMenuItem_5 = new JMenuItem("\u6570\u5B57\u5206\u7EC4(I)");
mntmNewMenuItem_5.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_I, 0));
mnNewMenu_1.add(mntmNewMenuItem_5);
JMenu mnNewMenu_2 = new JMenu("\u5E2E\u52A9(H)");
mnNewMenu_2.setMnemonic('H');
menuBar.add(mnNewMenu_2);
JMenuItem mntmNewMenuItem_6 = new JMenuItem("\u5E2E\u52A9\u4E3B\u9898(H)");
mntmNewMenuItem_6.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, 0));
mnNewMenu_2.add(mntmNewMenuItem_6);
JSeparator separator = new JSeparator();
mnNewMenu_2.add(separator);
JMenuItem mntmNewMenuItem_7 = new JMenuItem("\u5173\u4E8E\u8BA1\u7B97\u5668(A)");
mntmNewMenuItem_7.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, 0));
mnNewMenu_2.add(mntmNewMenuItem_7);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
txtJiSuanJieGuo = new JTextField();
txtJiSuanJieGuo.setHorizontalAlignment(SwingConstants.RIGHT);
txtJiSuanJieGuo.setToolTipText("\u8BA1\u7B97\u7ED3\u679C");
txtJiSuanJieGuo.setText("0.");
txtJiSuanJieGuo.setBounds(10, 0, 334, 29);
contentPane.add(txtJiSuanJieGuo);
txtJiSuanJieGuo.setColumns(20);
JButton btn7 = new JButton("7");
btn7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("7");
}
});
btn7.setBounds(40, 64, 52, 37);
contentPane.add(btn7);
JButton btnChu = new JButton("4");
btnChu.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("4");
}
});
btnChu.setBounds(40, 119, 52, 37);
contentPane.add(btnChu);
JButton btn1 = new JButton("1");
btn1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
//TODO 按下1
txtJiSuanJieGuo.setText("1");
}
});
btn1.setBounds(40, 178, 52, 37);
contentPane.add(btn1);
JButton btn0 = new JButton("0");
btn0.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("0");
}
});
btn0.setBounds(40, 236, 52, 37);
contentPane.add(btn0);
JButton btn8 = new JButton("8");
btn8.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("8");
}
});
btn8.setBounds(102, 64, 52, 37);
contentPane.add(btn8);
JButton btn5 = new JButton("5");
btn5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("5");
}
});
btn5.setBounds(102, 119, 52, 37);
contentPane.add(btn5);
JButton btn2 = new JButton("2");
btn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("2");
}
});
btn2.setBounds(102, 178, 52, 37);
contentPane.add(btn2);
JButton btnZhengYuFu = new JButton("+/-");
btnZhengYuFu.setBounds(102, 236, 52, 37);
contentPane.add(btnZhengYuFu);
JButton btn9 = new JButton("9");
btn9.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("9");
}
});
btn9.setBounds(164, 64, 52, 37);
contentPane.add(btn9);
JButton btn6 = new JButton("6");
btn6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("6");
}
});
btn6.setBounds(164, 119, 52, 37);
contentPane.add(btn6);
JButton btn3 = new JButton("3");
btn3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText("3");
}
});
btn3.setBounds(164, 178, 52, 37);
contentPane.add(btn3);
JButton btnDian = new JButton(".");
btnDian.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
txtJiSuanJieGuo.setText(""+txtJiSuanJieGuo.getText()+".");
}
});
btnDian.setBounds(164, 236, 52, 37);
contentPane.add(btnDian);
JButton button_11 = new JButton("/");
button_11.setBounds(226, 64, 52, 37);
contentPane.add(button_11);
JButton btn7Cheng = new JButton("*");
btn7Cheng.setBounds(226, 119, 52, 37);
contentPane.add(btn7Cheng);
JButton btnJian = new JButton("-");
btnJian.setBounds(226, 178, 52, 37);
contentPane.add(btnJian);
JButton btnJia = new JButton("+");
btnJia.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
//+++++
txtJiSuanJieGuo.setText(""+txtJiSuanJieGuo.getText()+"+");
}
});
btnJia.setBounds(226, 236, 52, 37);
contentPane.add(btnJia);
JButton btnQuYu = new JButton("%");
btnQuYu.setBounds(288, 119, 52, 37);
contentPane.add(btnQuYu);
JButton btnDaoShu = new JButton("1/x");
btnDaoShu.setBounds(288, 178, 52, 37);
contentPane.add(btnDaoShu);
JButton btnDeng = new JButton("=");
btnDeng.setBounds(288, 236, 52, 37);
contentPane.add(btnDeng);
JButton btnSqrt = new JButton("sqr");
btnSqrt.setBounds(288, 64, 52, 37);
contentPane.add(btnSqrt);
JButton btnClear = new JButton("clear");
btnClear.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
//TODO 清空
txtJiSuanJieGuo.setText("0.");
}
});
btnClear.setBounds(251, 31, 93, 23);
contentPane.add(btnClear);
}
}
原文地址：http://blog.csdn.net/springmvc_springdata/article/details/40736865
