java加法器

import java.applet.;

import java.awt.;

import java.awt.event.*;

public class Li2_5 extends Applet implements ActionListener {

Label wz1,wz2,jh,dh;

TextField sr1,sr2;

TextField sc1,sc2,sc3;

Button btn;

public void init(){
	wz1 = new Label("請輸入要計算的數字");
	wz2 = new Label("計算結果為：");
	jh = new Label("+");
	dh = new Label("=");
	sr1 = new TextField(4);
	sr2 = new TextField(4);
	sc1 = new TextField(4);
	sc2 = new TextField(4);
	sc3 = new TextField(6);
	btn = new Button("關閉");
	add(wz1);
	add(sr1);
	add(sr2);
	add(wz2);
	add(sc1);
	add(jh);
	add(sc2);
	add(dh);
	add(sc3);
	add(btn);
	setSize(380,150);
	sr1.addActionListener(this);
	sr2.addActionListener(this);
	btn.addActionListener(this);
	
}



@Override
public void actionPerformed(ActionEvent e) {
	if(e.getSource()==sr1|| e.getSource()==sr2)
	{
		int a=0,b=0;
		a = Integer.parseInt(sr1.getText());
		b = Integer.parseInt(sr2.getText());
		b = b + a;
		String c;
		c = Integer.toString(b);
		sc1.setText(sr1.getText());
		sc2.setText(sr2.getText());
		sc3.setText(c);
	}
	else
	{
		dispose();
		System.exit(0);
	}
		
}



private void dispose() {
	// TODO Auto-generated method stub
	
}
           

}

//給自己留念用哒，第一次寫java，希望以後能不斷進步