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Check if a particular value exists in Java LinkedHashMap example

  1. /*
  2.   Check if a particular value exists in Java LinkedHashMap example
  3.   This Java Example shows how to check if LinkedHashMap object contains a particular
  4.   value using containsValue method of LinkedHashMap class.
  5. */
  6.  
  7. import java.util.LinkedHashMap;
  8.  
  9. public class CheckValueOfLinkedHashMapExample {
  10.  
  11.   public static void main(String[] args) {
  12.    
  13.     //create LinkedHashMap object
  14.     LinkedHashMap lHashMap = new LinkedHashMap();
  15.    
  16.     //add key value pairs to LinkedHashMap
  17.     lHashMap.put("1","One");
  18.     lHashMap.put("2","Two");
  19.     lHashMap.put("3","Three");
  20.    
  21.     /*
  22.       To check whether a particular value exists in LinkedHashMap use
  23.       boolean containsValue(Object key) method of LinkedHashMap class.
  24.       It returns true if the value is mapped to one or more keys in the
  25.       LinkedHashMap otherwise false.
  26.     */
  27.    
  28.     boolean blnExists = lHashMap.containsValue("Two");
  29.     System.out.println("Two exists in LinkedHashMap ? : " + blnExists);
  30.   }
  31. }
  32.  
  33. /*
  34. Output would be
  35. Two exists in LinkedHashMap ? : true
  36. */