[Solved] how to remove duplicate value from hash map [closed]

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Your HashMap is hm. Put the values of hm in another HashMap hm2 in which the values of hm are the keys of hm2, and the values of hm2 can be anything (e.g. the object Boolean.TRUE).

Then loop through that second HashMap hm2 and print out its keys.

Instead of HashMap you can also use HashSet for hm2 (this is even better as you would not need the Boolean.TRUE part).

import java.util.HashMap;
import java.util.HashSet;

public class MyClass {

    public static void main(String[] args) {

        HashMap<Integer, String> hm = new HashMap<Integer, String>();
        hm.put(1, "Anil");
        hm.put(2, "Deven");
        hm.put(3, "sanjay");
        hm.put(4, "sanjay");
        hm.put(5, "Raj");
        hm.put(6, "sanjay");

        HashSet<String> hm2 = new HashSet<String>();
        hm2.addAll(hm.values());

        for (String str : hm2){
            System.out.println(str);
        }
    }

}

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solved how to remove duplicate value from hash map [closed]