摘要:
package com.hanqi; public abstract class UseCase1 { abstract void testAbstract(); UseCase1(){//(1)首先执行父类构造方法 System.out.println("before testAbstract() 阅读全文
摘要:
package com.hanqi; public class UseCase2 { public void doSomething(){ System.out.println("父类.doSomething()"); } public void doAnything(){ System.out.p 阅读全文