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Sunday, 14 June 2015

How to get entry set from Hashtable

import java.util.Hashtable;
import java.util.Map.Entry;
import java.util.Set;

public class HashtableEntrySet {
   
    public static void main(String[] args) {
       
        Hashtable<Integer,String> ht = new Hashtable<Integer,String>();
       
        /*
         * Maps the specified key to the specified
         * value in this hashtable
         */
        ht.put(1, "java");
        ht.put(2, "jersey");
        ht.put(3, "spring");
        ht.put(4, "c");
        ht.put(5, "php");
       
        //print hashtable
        System.out.println("Hash Table is ="+ht);
       
        //Returns a Set view of the mappings contained in this
        // map
        Set<Entry<Integer, String>> entry = ht.entrySet();
       
        for (Entry<Integer, String> ent : entry) {
            System.out.println(" key = "+ent.getKey()+" value = "+ent.getValue());
        }
    }   
   
}

Output:

Hash Table is ={5=php, 4=c, 3=spring, 2=jersey, 1=java}

key = 5 value = php

key = 4 value = c

key = 3 value = spring

key = 2 value = jersey

key = 1 value = java


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