package generics;

import java.util.*;

import java.lang.reflect.*;

/**

* RUN:

* javac generics/UnboundedWildcards1.java && java generics.UnboundedWildcards1

* OUTPUT:

*

*/

public class UnboundedWildcards1 {

static List list1;

static List<?> list2;

static List<? extends Object> list3;

static void assign1(List list) {

list1 = list;

list2 = list;

list3 = list;

}

static void assign2(List<?> list) {

list1 = list;

list2 = list;

list3 = list;

}

static void assign3(List<? extends Object> list) {

list1 = list;

list2 = list;

list3 = list;

}

public static void main(String[] args) {

assign1(new ArrayList());

assign2(new ArrayList());

assign3(new ArrayList()); // Warning

assign1(new ArrayList<String>());

assign2(new ArrayList<String>());

assign3(new ArrayList<String>());

List<?> wildList = new ArrayList();

wildList = new ArrayList<String>();

assign1(wildList);

assign2(wildList);

assign3(wildList);

}

}