public class Base{private void say (int number){
System.out.println ("Base: "+number);
}
}

public class Over extends Base{
public void say (int number ){
System.out.println ("Over: "+number);
}
public static void main (String[] args){
Over over=new Over () ;
over.say (12);
}
}

哥们把排版好好整整吧，看着蛋疼，输出为
Over: 12
原因：子类复写父类方法

简单呀。。。。。