子类父类构造函数

class Base {

    private String name = "base";

    public Base() {
        tellName();
        printName();
    }

    public void tellName() {
        System.out.println("Base tell name: " + name);
    }

    public void printName() {
        System.out.println("Base print name: " + name);
    }
}


public class Dervied extends Base {

        private String name = "dervied";

        public Dervied() {
            tellName();
            printName();
        }

        public void tellName() {
            System.out.println("Dervied tell name: " + name);
        }

        public void printName() {
            System.out.println("Dervied print name: " + name);
        }

        public static void main(String[] args){

            new Dervied();
        }
    }
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Dervied tell name: null
Dervied print name: null
Dervied tell name: dervied
Dervied print name: dervied