父类子类有关问题

public class Sub extends Super {    int argA;    static int argB;    int argC = 13;    {        System.out.println("动态语句块：Sub.argA = " + (argA = 11));    }    static{        System.out.println("静态语句块：Sub.argB = " + (argB = 12));    }    Sub(){        //super();        System.out.println("构造方法块：Sub.argC = " + argC);        print();        print(argB);        argA = 30;    }    void print(int argA) {        System.out.println("sub.print(args)");        System.out.println(argA);    }        void print(){        System.out.println("sub.print()");        System.out.println(argA);        System.out.println(argB);    }    public static void main(String[] args) {        System.out.print(new Sub().argA);    }}class Super {    protected int argA = 21;    protected static int argB;    static{        argB = 22;    }    Super() {        print();        print(argA);        argA = 23;    }    void print(int argA) {        System.out.println("super.print(args)");        System.out.println(argA);    }        void print() {        System.out.println("super.print()");        System.out.println(argA);        System.out.println(argB);    }}

public class Sub extends Super {    int argA;    static int argB;    int argC = 13;    { //这里应该是在new 一个Sub实例的时候才打印        System.out.println("动态语句块：Sub.argA = " + (argA = 11));    }    static{        System.out.println("------------Sub()静态数据模块.-----------") ;        System.out.println("静态语句块：Sub.argB = " + (argB = 12));    }    Sub(){        //super();        System.out.println("构造方法块：Sub.argC = " + argC);        print();        print(argB);        argA = 30;    }    void print(int argA) {        System.out.println("sub.print(args)");        System.out.println(argA);    }        void print(){        System.out.println("sub.print()");        System.out.println(argA);        System.out.println(argB);    }    public static void main(String[] args) {        System.out.print(new Sub().argA);    }}class Super {    protected int argA = 21;    protected static int argB;    static{        System.out.println("------------Supper()静态数据模块.-----------") ;        argB = 22;    }    Super() {        System.out.println("------------Supper()构造函数 begin.-----------") ;        print();        print(argA);        argA = 23;        System.out.println("------------Supper()构造函数 end.-----------") ;    }    void print(int argA) {        System.out.println("super.print(args)");        System.out.println(argA);    }        void print() {        System.out.println("------------Supper().print() begin .-----------") ;        System.out.println("Supper().argA = " + argA);        System.out.println("Supper().argA = " + argB);        System.out.println("------------Supper().print() end .-----------") ;            }}
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探讨

大家，覆盖问题没什么好谈的吗？为什么执行父类方法，还要被子类给覆盖。