HashMap search

import java.util.HashMap;
//from  jav a  2s .  co m
public class Main {
  public static void main(String[] args) {
    HashMap<String, String> hMap = new HashMap<String, String>();

    hMap.put("1", "One");
    hMap.put("2", "Two");
    hMap.put("3", "Three");

    boolean blnExists = hMap.containsKey("3");
    System.out.println("3 exists in HashMap ? : " + blnExists);
  }
}

import java.util.HashMap;
import java.util.Map;
/*from   j a va2 s  .c o  m*/
public class Main {
  public static void main(String[] a) {
    Map<String,String> map = new HashMap<String,String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map.containsKey("key1"));
    System.out.println(map.containsValue("value2"));
  }
}