这个JAVA我怎么编译都不过，拜托高手帮我看看

来源：百度知道 编辑：UC知道 时间：2024/06/11 23:55:14
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class e71 extends Applet implemnents ActionListener
TextField text;
Button buttonEnter,buttonQuit;
public void init()
{ text=new TextField("0",10);add(text);
buttonEnter=new Button("确定");buttonQuit=new Button("清除");
add(buttonEnter);add(buttonQuit);
buttonEnter.addActionListener(this);
buttonQuit.addActionListener(this);
text.addActionListener(this);
}

public void paint(Graphics g)
{g.drawString("在文本框输入数字符号回车或单击按钮",10,100);
g.drawString("第文本框内显示该数的 平方根",10,120);
}
public void actionPerformed(ActionEvent e)
{if (e.getSource()==buttonEnter||e.getSource()==text)
{double number=0;
try{number=Double.valueOf(text.getText()).doubleValue();
text.setText(""+Math.sqrt(number));
}

package del;

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
//implements 写错了,类少了一个{
public class e71 extends Applet implements ActionListener{
TextField text;
Button buttonEnter,buttonQuit;
public void init()
{ text=new TextField("0",10);add(text);
buttonEnter=new Button("确定");buttonQuit=new Button("清除");
add(buttonEnter);add(buttonQuit);
buttonEnter.addActionListener(this);
buttonQuit.addActionListener(this);
text.addActionListener(this);
}

public void paint(Graphics g)
{g.drawString("在文本框输入数字符号回车或单击按钮",10,100);
g.drawString("第文本框内显示该数的 平方根",10,120);
}
public void actionPerformed(ActionEvent e)
{if (e.getSource()==buttonEnter||e.getSource()==text)
{double number=0;
try{number=Double.valueOf(text.getText()).doubleValue();
tex