JavaSE-10.2.7【Java中继承的注意事项】

package day1.yppah02;

/*
2.8. Java中继承的注意事项

    1. Java中类只支持单继承，不支持多继承
        错误范例：class A extends B, C { }
    2. Java中类支持多层继承
        正确范例：calss B extends A { }
                  calss C extends B { }
 */

/*public class Son extends Father, Mother{ //error

}*/

public class Son extends Father{

}

package day1.yppah02;

public class Mother {

    public void dance(){
        System.out.println("妈妈爱跳舞");
    }

}

package day1.yppah02;

public class Father extends Granddad{

    public void smoke(){
        System.out.println("爸爸爱抽烟");
    }

}

package day1.yppah02;

public class Granddad {

    public void drink(){
        System.out.println("爷爷爱喝酒");
    }

}