java中Super到底是什么意思?必须举例说明! |
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java中Super到底是什么意思?必须举例说明!
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马克-to-win，Super是一个参考（或说指针）指向他紧邻的父类（见下面的例子）。Super is a reference of its neighbour superclass So Use super to call superclass’s constructor 用super可以指向被隐藏的父类的同名成员。Use super to call superclass’s members that has been hidden by a member of a subclass. 3.1 super指向父类的成员 注 意： 下例中：子类和父类都有i，我们一共有两个i，用super可以指向前一个父类的i。 note that: in the following case, subclass and super class both have a i, so altogether they have two i. 例1.3.1 class AMark_to_win { int i; } class B extends AMark_to_win { int i; public B(int x, int y) { super.i = x;//AMark_to_win 的 i被赋值 i = y;//B的i被赋值 } public void show() { System.out.println("i in superclass: " + super.i); System.out.println("i in subclass: " + i); } } public class Test { public static void main(String[] args) { B b = new B(2, 3); b.show(); } }result is: i in superclass: 2 i in subclass: 3
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