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package day2; import java.util.Collection; public class GenericMethod<E> { //范型方法上,参数范型可以传入任意类型,但是返回参数类型 public static void main(String[] args) { // TODO Auto-generated method stub GenericMethod g=new GenericMethod(); String str=g.method(1, 2);//错,“<T> T method(T t1,T t2)”-普通方法的返回T,需要强转,或者为Object类 String str1=methodStatic(2,3.2); //错 Number num=methodStatic(2.3,3);//对,"static <T> T methodStatic(T t1,T t2)"-静态方法,Nmuber是两个参数的父类 Object n=g.methodW(2,3.3);//对 } public E methodW(E e1,E e2) { return null; } public static <T> T methodStatic(T t1,T t2) { return null; } public <T> T method(T t1,T t2) { return null; } public <T> T method (Collection<String> c,T t) { return null; } }
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原文地址:http://www.cnblogs.com/beyondbycyx/p/4648919.html