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  • 11.断点追踪初始化过程

    class Person {
        String name="李光";// 姓名
        public Person() {
            // super();//写不写该语句,效果一样
            System.out.println("execute Person()");
        }
        public Person(String name) {
            this.name = name;
            System.out.println("execute Person(name)");
        }
    }
    
    class Student extends Person {
        String school="武汉大学";// 学校
        public Student() {
            // super();//写不写该语句,效果一样
            System.out.println("execute Student() ");
        }
        public Student(String name, String school) {
            super(name); // 显示调用了父类有参构造方法,将不执行无参构造方法
            this.school = school;
            System.out.println("execute Student(name,school)");
        }
    }
    
    class PostGraduate extends Student {
        String guide;// 导师
        public PostGraduate() {
            // super();//写不写该语句,效果一样
            System.out.println("execute PostGraduate()");
        }
        public PostGraduate(String name, String school, String guide) {
            super(name, school);
            this.guide = guide;
            System.out.println("execute PostGraduate(name, school, guide)");
        }
    }
    
    class TestInherit {
        public static void main(String[] args) {
            PostGraduate pgdt=null;
            pgdt = new PostGraduate();
            System.out.println();
            pgdt=new PostGraduate("刘致同","北京大学","王老师");
        }
    }
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  • 原文地址:https://www.cnblogs.com/xiaotaoxu/p/5536449.html
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