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removeDuplicates.java

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package Arrays;

import java.util.HashSet;

import java.util.Set;

public class removeDuplicates {

/**

* Given an array arr, remove the duplicates from arr

* @param arr

*/

public static void removeDuplicates(int [] arr){

Set<Integer> st = new HashSet<Integer>();

for(int i=0;i<arr.length;i++){

if(!st.contains(arr[i])){

st.add(arr[i]);

}else {

arr[i] = 0;

}

}

// convert back to array

int [ ] result = new int[st.size()];

int i = 0;

for (int num:

st) {

result[i++] = num;

}

// Print the new array

System.out.print("New Array without Duplicates: ");

for (int j = 0; j < result.length; j++) {

System.out.print(result[j] + " ");

}

}

public static void main(String [] args){

int [] arr = {2,4,5,7,6,4,6,12,11,13,12,7};

removeDuplicates(arr);

}

}