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  • 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
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  • 原文地址:https://www.cnblogs.com/sunzhongyu008/p/11329134.html
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