test69.java

SCJP认证考试资料

import java.util.*;
class A {}
class B extends A {}
public class Test69 {
    public static void main(String[] args) {
	List<A> listA = new LinkedList<A>();
	List<B> listB = new LinkedList<B>();
	List<Object> listC = new LinkedList<Object>();
	m1(listA);
	m1(listB);
	m1(listC);
	m2(listA);
	m2(listB);
	m2(listC);
    }
    public static void m1(List<? extends A> list) {}
    public static void m2(List<A> LIST) {}
}