import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Sample4_7 extends Applet implements ActionListener{
Label l;
TextField input;
double d=0.0;
public void init(){
l=new Label("请输入要转换的英镑数目:");
input=new TextField(15);
add(l);
add(input);
input.addActionListener(this);
}
public void paint(Graphics g){
g.drawString("转换为人民币:"+d,25,70);
}
public void actionPerformed(ActionEvent e){
d=(Double.valueOf(input.getText()).doubleValue())*10.356;
repaint();
}
}
为什么没有main方法啊?到底怎么实现 能弹出一个小程序查看器????
拜托!我这是java!!!!!!!!!!!!!!!!!!