HashSet

package test.lindl.mor;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class Test2 {
public static void main(String[] args) {
HashMap<String, String> hashMap=new HashMap<String,String>();
hashMap.put("qq", "qq");
hashMap.put("ww", "ww");
hashMap.put("ee", "ee");
hashMap.put("aa", "aa");
hashMap.put("ss", "ss");
hashMap.put("dd", "dd");
System.out.println("---------Collection Value----------");
Collection<String> collection=hashMap.values();
for(String str: collection){
System.out.println(str);
}
System.out.println("----------KeySet Key------------");
Set<String> set=hashMap.keySet();
java.util.Iterator<String> it=set.iterator();
while(it.hasNext()){
System.out.println(it.next());
}
System.out.println("-----------Map Entry---------");
Set<Map.Entry<String, String>> kvSet=hashMap.entrySet();
java.util.Iterator<Map.Entry<String, String>> it2=kvSet.iterator();
while(it2.hasNext()){
Map.Entry<String, String> map=it2.next();
System.out.println("key:"+map.getKey()+" "+"value:"+map.getValue());
}

}
}
---------Collection  Value----------

dd

ee

ww

ss

aa

qq

----------KeySet Key------------

dd

ee

ww

ss

aa

qq

-----------Map Entry---------

key:dd   value:dd

key:ee   value:ee

key:ww   value:ww

key:ss   value:ss

key:aa   value:aa

key:qq   value:qq