代码如下：

import java.awt.*;
import javax.swing.*;
//*********Found********** 
public class Java_3 __________________ JApplet{ 
    //*********Found********** 
    public void ___________________() {
        Container contentPane = getContentPane();
        JLabel label = new JLabel("Java的诞生是对传统计算模式的挑战！",
                SwingConstants.CENTER);
        //*********Found********** 
        contentPane.add(_____________________);
    }
}