Find duplicate elements and remove it.

  This   is  a  java example   for  finding   duplicate  elements  using  for loop  and remove
  the  duplicate  in   given array. Here  it is shows  how we can do it  two different   ways.

  In  class  we have use  Hashset  . Code is  simple  only  two  java class  is  loose coupled.

import java.util.HashSet;

public class RemoveDuplicatsinArray {

  public void    RemoveDublicatesA()   {

 

 

   String[] strArray = {"JAVA", "Python", "Perl", "JAVA", "C", "CPP", };

 

         for (int i = 0; i < strArray.length-1; i++)

         {

             for (int j = i+1; j < strArray.length; j++)

             {

                 if( (strArray[i].equals(strArray[j])) && (i != j) )

                 {

                     System.out.println("Duplicate Element is : "+strArray[j]);

                   

                   

                 }

             }

           }

     

  }

 public  static  void       main(String[] args) {

 

             System.out.println("=====   Using   For loop===========================");

    

          RemoveDuplicatsinArray a= new RemoveDuplicatsinArray();

 

           a.RemoveDublicatesA();

         

      

                System.out.println("=====   Using  HashSet ===========================");

        

          System.out.println("****Remove Duplicats  using  Collection:*********");

        

                          DuplicatesInArray b=new DuplicatesInArray();

        

              b.RemoveDublicatesB();  

   

 }

}

 class DuplicatesInArray

  {

     public  void  RemoveDublicatesB()

    {

     

       String[] strArray = {"JAVA", "Python", "Perl", "JAVA", "C", "CPP" ,"CPP"};

        HashSet set = new HashSet();

       

        for (String arrayElement : strArray)

        {

            if(!set.add(arrayElement))

            {

                System.out.println("Duplicate Element is : "+arrayElement);

            }

        }

       

       

       

       

        System.out.println( "  Arrays Elecments ");

     

         

        for (String arrayElement : strArray)

             {

        

               System.out.println( arrayElement);

        

               set.add(arrayElement);

               

              

                 }

     

            System.out.println("Elements After removing Dublicates:" );

    

 

          for(String arryset:set){

        

           System.out.println( arryset);

             }

         

                  

    }  

}

Programme  out put

=====   Using   For loop===========================

Duplicate Element is : JAVA

=====   Using  HashSet ===========================

****Remove Duplicats  using  Collection:*********

Duplicate Element is : JAVA

Duplicate Element is : CPP

  Arrays Elecments 

JAVA

Python

Perl

JAVA

C

CPP

CPP

Elements After removing Dublicates:

JAVA

CPP

C

Perl

Python