关于java的加法器,骨灰级或次骨灰级的朋友请进来下.该如何解决

关于java的加法器,骨灰级或次骨灰级的朋友请进来下....
这是我的那本清华教材上的源码,可是我在windows的记事本下编译不出来,请高手们尽情发挥,帮我看下是什么问题,在此谢过:
import   java.awt.*;
import   java.awt.event.*;
import   javax.swing.*;
public   class   Adder   implements   ActionListener
{
JFrame   AdderFrame;
JTextField   TOprand1;//被加数
JTextField   TOprand2;//加数
JLabel   LAdd,LSum;//加号,和
JButton   BAdd;//Add!按钮
int   i=0;
public   Adder()
{

//建立图形界面的屏幕显示部分
AdderFrame=new   JFrame( "AdderFrame ");
TOprand1=new   JTextField( "0.0 ");
LAdd=new   JLabel( "+ ");
LSum=new   JLabel( "=         ");
BAdd=new   JButton( "Add! ");
AdderFrame.getContentPane().setLayout(new   FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);
//为命令按钮添加事件监听器,监听器的实参是Adder类的对象BAdd.addActionListener(this);
public   void   actionPerformed(ActionEvent   event)
{
//事件服务代码
i=(i+1)%2;
if(i==1)
{//i为奇数,求和
int   sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand2.getText()).doubleValue());
LSum.setText( "= "+sum);
}
else{//i为偶数,清零
TOprand1.setText( "0.0 ");
TOprand2.setText( "0.0 ");
LSum.setText( "= ");
};
}
//主视窗关闭的事件处理
AdderFrame.addWindowListener(new   WindowAdapter()
public   void   WindowClosing(WindowEvent   e)
{
System.exit(0);
}
});
}
public   static   void   main(String[]   args)
{
Adder   adder=new   Adder();
}
}

[解决办法]
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class Adder implements ActionListener {
JFrame AdderFrame;

JTextField TOprand1;// 被加数

JTextField TOprand2;// 加数

JLabel LAdd, LSum;// 加号,和

JButton BAdd;// Add!按钮

int i = 0;

public Adder() {

// 建立图形界面的屏幕显示部分
AdderFrame = new JFrame( "AdderFrame ");
TOprand1 = new JTextField( "0.0 ");
TOprand2 = new JTextField( "0.0 ");
LAdd = new JLabel( "+ ");
LSum = new JLabel( "= ");
BAdd = new JButton( "Add! ");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);

BAdd.addActionListener(this);

// 主视窗关闭的事件处理
AdderFrame.addWindowListener(new WindowAdapter() {
public void WindowClosing(WindowEvent e) {
System.exit(0);
}
});
}

// 为命令按钮添加事件监听器,监听器的实参是Adder类的对象BAdd.addActionListener(this);
public void actionPerformed(ActionEvent event) {
// 事件服务代码
i = (i + 1) % 2;
if (i == 1) {// i为奇数,求和
int sum = (int) (Double.valueOf(TOprand1.getText()).doubleValue() + Double
.valueOf(TOprand2.getText()).doubleValue());
LSum.setText( "= " + sum);
} else {// i为偶数,清零
TOprand1.setText( "0.0 ");

TOprand2.setText( "0.0 ");
LSum.setText( "= ");
}
}

public static void main(String[] args) {
Adder adder = new Adder();
}
}

这样可以了，但是关闭窗口的事件处理好像有点问题，Java界面的没接触过，知道的就这么多了
[解决办法]
/***************************
找本好点的书吧，垃圾教材害死人，一堆的错

下面是我改过的代码
****************************/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Adder implements ActionListener{
JFrame AdderFrame;
JTextField TOprand1; //被加数
JTextField TOprand2; //加数
JLabel LAdd, LSum; //加号,和
JButton BAdd; //Add!按钮
int i = 0;
public Adder (){
AdderFrame = new JFrame( "AdderFrame ");
TOprand1 = new JTextField( "0.0 ");
TOprand2 = new JTextField( "0.0 ");

LAdd = new JLabel( "+ ");
LSum = new JLabel( "= ");
BAdd = new JButton( "Add! ");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);

AdderFrame.addWindowListener(new WindowAdapter(){
public void WindowClosing(WindowEvent e){
System.exit(0);
}
});
}

public void actionPerformed(ActionEvent event){

i = (i + 1) % 2;
if (i == 1){
int sum = (int) (Double.valueOf(TOprand1.getText()).doubleValue() +
Double.valueOf(TOprand2.getText()).doubleValue());
LSum.setText( "= " + sum);
} else{
TOprand1.setText( "0.0 ");
TOprand2.setText( "0.0 ");
LSum.setText( "= ");
}
;
}

public static void main(String[] args){
Adder adder = new Adder ();
}
}
[解决办法]
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Adder implements ActionListener {
JFrame AdderFrame;

JTextField TOprand1;// 被加数

JTextField TOprand2;// 加数

JLabel LAdd, LSum;// 加号,和

JButton BAdd;// Add!按钮

int i = 0;

public Adder() {

// 建立图形界面的屏幕显示部分
AdderFrame = new JFrame( "AdderFrame ");
TOprand1 = new JTextField( "0.0 ");
TOprand2 = new JTextField( "0.0 ");
LAdd = new JLabel( "+ ");
LSum = new JLabel( "= ");
BAdd = new JButton( "Add! ");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);
//为命令按钮添加事件监听器,监听器的实参是Adder类的对象
BAdd.addActionListener(this);
}
public void actionPerformed(ActionEvent event) {
// 事件服务代码
i = (i + 1) % 2;
if (i == 1) {// i为奇数,求和
int sum = (int) (Double.valueOf(TOprand1.getText()).doubleValue() + Double

.valueOf(TOprand2.getText()).doubleValue());
LSum.setText( "= " + sum);
} else {// i为偶数,清零
TOprand1.setText( "0.0 ");
TOprand2.setText( "0.0 ");
LSum.setText( "= ");
}
;

// 主视窗关闭的事件处理
AdderFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}

public static void main(String[] args) {
Adder adder = new Adder();
}
}
这样就可以了
[解决办法]
给你改了点，楼主发的有语法错误！
增加了一句
BAdd.addActionListener(this); // 注册事件 你没这个

PS: 命名看的很别扭


＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝以下为修改后的代码＝＝＝＝＝

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Adder implements ActionListener {
JFrame AdderFrame;

JTextField TOprand1;// 被加数

JTextField TOprand2;// 加数

JLabel LAdd, LSum;// 加号,和

JButton BAdd;// Add!按钮

int i = 0;

public Adder() {

// 建立图形界面的屏幕显示部分
AdderFrame = new JFrame( "AdderFrame ");
TOprand1 = new JTextField( "0.0 ");
TOprand2 = new JTextField( "0.0 ");
LAdd = new JLabel( "+ ");
LSum = new JLabel( "= ");
BAdd = new JButton( "Add! ");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);
BAdd.addActionListener(this); // 注册事件 你没这个

}

// 为命令按钮添加事件监听器,监听器的实参是Adder类的对象BAdd.addActionListener(this);
public void actionPerformed(ActionEvent event) {
// 事件服务代码
i = (i + 1) % 2;
if (i == 1) {// i为奇数,求和
int sum = (int) (Double.valueOf(TOprand1.getText()).doubleValue() + Double
.valueOf(TOprand2.getText()).doubleValue());
LSum.setText( "= " + sum);
} else {// i为偶数,清零
TOprand1.setText( "0.0 ");
TOprand2.setText( "0.0 ");
LSum.setText( "= ");
}
;

// 主视窗关闭的事件处理
AdderFrame.addWindowListener(new WindowAdapter() {
public void WindowClosing(WindowEvent e) {
System.exit(0);
}
});
}

public static void main(String[] args) {
Adder adder = new Adder();
}
}