» » » Java Basic example program to check particular value exists in hashmap

1.Basic Java example program to check particular value exists in hashmap


  1. package com.javacheckvaluehashmap;
  2.  
  3. import java.util.Hashmap;
  4. import java.util.Iterator;
  5. import java.util.Map;
  6. import java.util.Map.Entry;
  7.  
  8. public class HashmapExample{
  9.  
  10. public static void main(String[] args) {
  11.   
  12. //create an Hashmap object
  13. HashMap<String, String> hashmap = new HashMap();
  14.        
  15. //Add key values pairs to hashmap
  16.         
  17. hashmap.put("1","One");
  18. hashmap.put("2","Two");
  19. hashmap.put("3","Three");
  20. hashmap.put("4","Four");
  21. hashmap.put("5","Five");
  22. hashmap.put("6","Six");       
  23.         
  24.  
  25.  /*
  26.  To check whether a particular value exists in HashMap use
  27.  boolean containsValue(Object value) method of HashMap class.
  28. containsValue(Object value) returns true if the HashMap contains mapping for specified
  29. value otherwise false.*/
  30.        
  31. boolean isExists = hashmap.containsValue("Six");
  32. System.out.println("The value Six exists in HashMap ? : " + isExists);
  33.     
  34.  
  35. if(!hashmap.isEmpty()){
  36.  
  37. Iterator it=hashmap.entrySet().iterator();
  38.              
  39. while(it.hasNext()){

  40. Map.Entry obj=(Entry) it.next();
  41. System.out.print(obj.getKey()+" ");
  42. System.out.println(obj.getValue());
  43.              
  44. }           
  45. }   
  46.  
  47. }
  48.  
  49. }
     



Output:

  1. The value Six exists in HashMap ? : true
  2. 1 One
  3. 2 Two
  4. 3 Three
  5. 4 Four
  6. 5 Five
  7. 6 Six

check particular value exits in hashmap

Instance Of Java

We will help you in learning.Please leave your comments and suggestions in comment section. if you any doubts please use search box provided right side. Search there for answers thank you.
«
Next
Newer Post
»
Previous
Older Post

No comments

Leave a Reply

Select Menu