Java学习----到底调用哪一个方法(多态)

public class Father {public void print() {System.out.println("Father:print()");}
}

public class Son extends Father{// 方法的覆盖：子类重写父类的同名方法 Overridepublic void print() {System.out.println("Son:print()");}// Father obj1 = son;public void a(Father obj1) {//System.out.println("Son:a()");
        obj1.print();}public static void main(String[] agrs) {// 父类 对象 = new 子类();Father obj = new Son();obj.print(); // Son:print()//obj.a(); 只能调用子类覆盖父类的方法// 子类对象赋给父类Son son = new Son();son.a(son);  // Son:print()
        Father obj2 = new Father();obj2.print(); // Father:print()
    }
}

Son:print()
Son:print()
Father:print()