初学者急求 java小问题解决办法！！

[zbwork000]

import java.awt.*;
import java.awt.event.*;

public class TFMath{
public static void main(String args[]){
new TTFrame().launchFrame();
}
}

class TFFrame extends Frame{
TextField num1,num2,num3;
public void launchFrame(){
Frame f1 = new Frame("math");
num1 = new TextField(10);
num2 = new TextField(10);
num3 = new TextField(20);
Label lab1 = new Label("+");
Button b1 = new Button("=");
b1.addActionListener(new MyMonitor());
setLayout(new FlowLayout());
add(num1);
add(lab1);
add(num2);
add(b1);
add(num3);
pack();
f1.setVisible(true);
}

}


class MyMonitor implements ActionListener{

TFFrame tf1 = null;

public MyMonitor(TFFrame tf1){
this.tf1 = tf1;
}

public void actionPerformed(ActionEvent e) {
int n1 = Integer.parseInt(tf1.num1.getText());
int n2 = Integer.parseInt(tf1.num2.getText());
System.out.println(""+(n1+n2));
}
}

这是一个用窗口实现加法的程序。有点问题，请大家帮忙看看，谢谢了。

[xwguan]

有点乱~

[cydp007]

import java.awt.*;
import java.awt.event.*;

public class TFMath {
	public static void main(String args[]) {
		new TFFrame().launchFrame();
	}
}

class TFFrame extends Frame {
	private static final long serialVersionUID = 1L;
	TextField  num1, num2, num3;

	public void launchFrame() {
		//Frame f1 = new Frame("math");//这句话没必要..
		num1 = new TextField(10);
		num2 = new TextField(10);
		num3 = new TextField(20);
		Label lab1 = new Label("+");
		Button b1 = new Button("=");
		b1.addActionListener(new MyMonitor());
		setLayout(new FlowLayout());
		add(num1);
		add(lab1);
		add(num2);
		add(b1);
		add(num3);
		pack();
		setVisible(true);
	}
	class MyMonitor implements ActionListener {//这里写成内部类..

		public void actionPerformed(ActionEvent e) {
			int n1 = Integer.parseInt(num1.getText());
			int n2 = Integer.parseInt(num2.getText());
			System.out.println("" + (n1 + n2));
			num3.setText("" + (n1 + n2));
		}

}

}

[SylvanLiu]

new TTFrame().launchFrame()与class TFFrame extends Frame，一看就有类名上的错误；

b1.addActionListener(new MyMonitor());与public MyMonitor(TFFrame tf1)，构造函数调用不当

其他的没仔细看

[zbwork000]

谢谢2楼的你的回答。我是第一次在这里发贴的，