How to Remove duplicates from String Array in Java?

 How to Remove duplicates from String Array ?

>>There are different ways we can remove duplicates in string array. By using Set, LinkedHashset, Streams,HashMap etc.,. we can remove duplicates in string array.

import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
public class removeStringArrayDuplicates {
    public static void main(String[] args) {
    String data= "Java DOTNET SQL Angular Java SQL";
    String words[]=data.split(" ");
    Map<String,Integer> hm=new HashMap<String,Integer>();
    for(String word : words) {
    if(hm.containsKey(word)) {
    hm.put(word, hm.get(word)+1);
    }else {
    hm.put(word, 1);
    }
  }
    System.out.println("Final Hashmap="+hm);
    System.out.println("<<--------------------------------------------->>");
    System.out.print("Final duplicate values using Hash Map=");
    Set<String> keys=hm.keySet();
    for(String key : keys) {
        if(hm.get(key)>1) {
            System.out.print(key+" ");
        }
    }
    System.out.println();
    System.out.print("Final unique values using Hash Map=");
    for(String key : keys) {
        if(hm.get(key)<=1) {
            System.out.print(key+" ");
        }
    }
    System.out.println();
    System.out.println("<<--------------------------------------------->>");
    Set<String> s=new HashSet<>();
    for(String w :words) {
        s.add(w);
    }
    System.out.println("Final unique values using hash set="+s);
    System.out.println("<<--------------------------------------------->>");
    Set<String> lhs=new LinkedHashSet<>();
    for(String w :words) {
        lhs.add(w);
    }
    System.out.println("Final unique values using Linked hash set="+lhs);
    System.out.println("<<---------------------------------------------------->>");
    List<String> list = Arrays.stream(words).distinct().collect(Collectors.toList());
    System.out.println("Final array with unique values using streams=" + list);
  }
}

Output:

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