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java计算器代码总结 java计算器代码带注释

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JAVA计算器相关代码求大神｛详解｝我给java计算器代码总结你找找
package com.bj.calcultor;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Calcultor extends Frame implements ActionListener {
public static void main(String[] args) {//定义主方
new Calcultor();//创建匿名对象，并调用test()方法;
}
//定义按钮名称
String[] arr={"1","2","3","4","5","6","7","8","9","0","+","-","*","/","=","."};
JButton [] button=new JButton[arr.length];
JButton reset = new JButton("CE");
JTextField display = new JTextField(20);
//创建窗口，定义组件
//执行窗口事件:关闭窗口
private class WindowCloser extends WindowAdapter {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
}
public Calcultor(){
super("计算器");//定义标题
//定义面板容器，并布局
JPanel jpanel=new JPanel(new GridLayout(4,4));
//添加按钮，并给按钮添加名称
for (int i = 0; iarr.length; i++) {
button[i]= new JButton(arr[i]);
jpanel.add(button[i]);
}
JPanel panel2 = new JPanel();
panel2.add("Northr", display);
display.setEnabled(false);
panel2.add("East", reset);
this.add("North", panel2);
this.add("Center", jpanel);
for (int i = 0; iarr.length; i++){
addWindowListener(new WindowCloser());
setVisible(true);
setSize(400,400);
pack();
button[i].addActionListener(this);
reset.addActionListener(this);
display.addActionListener(this);
}
}
@Override
public void actionPerformed(ActionEvent e) {//定义事件
// TODO Auto-generated method stub
Object target=e.getSource();
Stringlable=e.getActionCommand();
if(target==reset){
handleReset();
}else if("0123456789.".indexOf(lable)0){
handleNumber(lable);
}else{
hadleOperator(lable);
}
}
boolean isFirstDigit=true;
private void hadleOperator(String key) {
if(operator.equals("+")){
number += Double.valueOf(display.getText());
}else if (operator.equals("-")){
number -= Double.valueOf(display.getText());
}else if (operator.equals("*")){
number *= Double.valueOf(display.getText());
}else if (operator.equals("/")){
number /= Double.valueOf(display.getText());
}else if(operator.equals("=")){
number =Double.valueOf(display.getText());
}
display.setText(String.valueOf(number));
operator=key;
isFirstDigit=true;
}
private void handleNumber(String key) {
if(true){
display.setText(key);//把键值设置为文本框内容
}else if(key.equals(".")display.getText().indexOf(".")0){
display.setText(display.getText()+".");//把文本框内容设置java计算器代码总结：display.getText()+"."
}else if(!key.equals(".")){
display.setText(display.getText() + key);//把文本框内容设置：display.getText()+key
isFirstDigit=false;
}
}
private void handleReset() {
display.setText("0");
isFirstDigit=true;
operator="=";
}
String operator="=";
Double number=0.0;
}
JAVA简单咋做，计算器代码简单写了下，代码如下请参照：
/**
* 计算器类
*
* @author Administrator
*
*/
public class Calculator extends JFrame implements ActionListener {
private static final long serialVersionUID = 3868243398506940702L;
// 文本框
private JTextField result;
// 按钮数组

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