super()关键字?有何用,怎么用?java
首先咱们上代码,实际测试来看看。函数
package com.yuan.test; class Game { Game(int i) { System.out.println("Game constructor"); } } class BoardGame extends Game { BoardGame(int i) { super(i); System.out.println("BoardGame constructor"); } } public class TestSuper extends BoardGame { TestSuper() { super(11); System.out.println("Chess constructor"); } public static void main(String[] args) { TestSuper x = new TestSuper(); } } //BoardGame constructor //Chess constructor
从例子能够看出,super( E )关键字用于调用父类的构造方法,其中 E 表示构造函数的参数。测试