类的继承

1.子类覆盖父类的成员变量

class A{
    String name = "tom";
    A(String name){
        this.name = name;
    }
}

class B extends A{
    String name = "jack";
    B(String name){
        super(name);
    }
}

public class BigInt {
    public static void main(String[] args) {
        B b = new B("helen");
        System.out.println(b.name);
    }
}

运行结果：

jack

 

---------------------------------------------------------------------------------------------------------------------------------------

class A{
    String name = "tom";
    A(String name){
        this.name = name;
    }
}

class B extends A{
    String name = "jack";
    B(String name){
        super(name);
    }
}

public class BigInt {
    public static void main(String[] args) {
        A b = new B("helen");
        System.out.println(b.name);
    }
}

运行结果：

helen

 

---------------------------------------------------------------------------------------------------------------------------------------

class A{
    String name = "tom";
    A(String name){
        this.name = name;
    }
}

class B extends A{
    String name = "jack";
    B(String name){
        super(name);
        this.name = name;
    }
}

public class BigInt {
    public static void main(String[] args) {
        A b = new B("helen");
        System.out.println(b.name);
    }
}

运行结果：

helen

 

---------------------------------------------------------------------------------------------------------------------------------------

class A{
    String name = "tom";
    A(String name){
        this.name = name;
    }
}

class B extends A{
    String name = "jack";
    B(String name){
        super(name);
        this.name = name;
    }
}

public class BigInt {
    public static void main(String[] args) {
        B b = new B("helen");
        System.out.println(b.name);
    }
}

运行结果：

helen

 

原文链接:https://www.cnblogs.com/sunzhongyu008/p/11329134.html
如有疑问请与原作者联系

标签：

版权申明：本站文章部分自网络，如有侵权，请联系：west999com@outlook.com
特别注意：本站所有转载文章言论不代表本站观点，本站所提供的摄影照片，插画，设计作品，如需使用，请与原作者联系，版权归原作者所有