Question

写一个最简单的JAVA继承代码？？谢谢

Answer 1

可运行的：
import java.awt.*;
import java.awt.event.*;

public class BackJFrame extends Frame{
public BackJFrame(){
super("台球");
setSize(300,300);
setBackground(Color.cyan); //背景
setVisible(true);
addWindowListener(new WindowAdapter()
{
public void windowClosing (WindowEvent e)
{System.exit(0);}
} );
}
public static void main(String args[]){
new BackJFrame();
}
}

追问

Frame这个类在那里呢？

追答

Frame是java的API中定义好的类

Answer 2

public class A {
}

public class B extends A{
}