做网站的总结,河北seo推广方法,正规企业展厅设计公司,域名优化在线关于泛型的基本介绍和理解请参考以下几篇文章#xff0c;或查询更多资料#xff1a;本篇以简单的List方式来进行说明。ArrayList继承了List,ArrayList没有继承ListList等价于List extends Object请参考以下代码#xff1a;/*** author Ding Chengyun* 2014-…关于泛型的基本介绍和理解请参考以下几篇文章或查询更多资料本篇以简单的List方式来进行说明。ArrayList继承了List,ArrayList没有继承ListList等价于List extends Object请参考以下代码/*** author Ding Chengyun* 2014-2-27*/package test;import java.util.ArrayList;import java.util.LinkedList;import java.util.List;/*** author Ding Chengyun* 2014-2-27L*/public class ListTest {public void method1(List list) {}public void method2() {method1(new ArrayList());method1(new ArrayList()); //会编译报错method1(new LinkedList());}public void method3(List extends Object list) {}public void method4() {method3(new ArrayList());method3(new ArrayList());method3(new LinkedList());}public void method5(List list) {//泛型中?等价于? extends Object}public void method6() {method5(new ArrayList());method5(new ArrayList());method5(new LinkedList());}/*** param args*/public static void main(String[] args) {List list new ArrayList(20);}}原文http://blog.csdn.net/sundenskyqq/article/details/27788705
