继承

package wang;

/**

• @author wangyongsheng
• @date 2021/4/23 8:11
  */
  public class uncle {
  private String name;
  private int age;

public uncle(){
System.out.println("舅的构造方法被创建");
}
public void fahongbao(){
System.out.println("发红包");
}
public void maiche(){
System.out.println("舅舅送车");
}
}
package wang;

/**

• @author wangyongsheng
• @date 2021/4/23 8:12
  */
  public class UncleOne {
  public void hejiu(){
  System.out.println("大舅喜欢喝酒");
  }
  public void faHongbao(){
  System.out.println("大舅喜欢发红包");
  }
  }
  package wang;

/**

• @author wangyongsheng
• @date 2021/4/23 8:13
  /
  public class demo05 {
  public static void main(String[] args) {
  / UncleOne uncleOne=new UncleOne();
  uncleOne.faHongbao();
  uncleOne.hejiu();

    UncleTwo uncleTwo=new UncleTwo();
    uncleTwo.fahongbao();
    uncleTwo.chouyan();*/
    UncleTwoSon uncleTwoSon=new UncleTwoSon();
    /*uncleTwoSon.fahonhgbao();
    uncleTwoSon.maiche();*/
}

}
package wang;

/**

• @author wangyongsheng
• @date 2021/4/23 9:10
  */
  public class demo06 {
  public static void main(String[] args) {
  final int a=1;
  final int []b={1,2,3};
  b[0]=10;
  b[1]=20;
  b[2]=30;
  int []c=new int[3];
  //b=c;
  }
  }
  package wang;

/**

• @author wangyongsheng

• @date 2021/4/23 8:13
  */
  public class UncleTwo extends uncle {

  public UncleTwo(){
  System.out.println("二舅的构造方法");

  }

//独有的方法
public  void  chouyan(){
    System.out.println("二舅喜欢抽烟");

}
//复写（腹写）Override 父类中的方法
public void fahongbao(){
    System.out.println("家道中落，不发红包");
}

}

package wang;

/**

• @author wangyongsheng
• @date 2021/4/23 8:31
  */
  public class UncleTwoSon extends UncleTwo{
  public UncleTwoSon(){
  super(); //调用二舅方法
  System.out.println("二舅儿子的方法被创建");
  }
  public void fahonhgbao(){
  System.out.println("逆袭了，红包接着发");
  }

}