import java.applet.*;
import java.awt.*;
import java.awt.event.*;public class Example8_2 extends Applet implements ActionListener{
    TextField text1,text2,text3;
    public void init()
    { text1=new TextField(10);
        text2=new TextField(10);
        text3=new TextField(10);
        add(text1);add(text2);add(text3);
        text1.addActionListener(this);
    }
    public void actionperformed(ActionEvent e)
    {if((e.getSource()==text1)&&(text1.getText().equals("boy")))
     {text3.setText("男孩");}
     else if((e.getSource()==text1)&&(text1.getText().equals("girl")))
     {text3.setText("女孩");}
     else if((e.getSource()==text1)&&(text1.getText().equals("sun")))
     {text3.setText("太阳");}
     else
     {text3.setText("没有该单词");}
    }
    
    public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
    }
    
}可以编译,看看你的一些编译设置是否弄好