How to Remove Duplicate Element in an Array Using Java

In this program, I will share how to remove duplicate element in an array using java programming language with an example/output.

How to Remove Duplicate Element in an Array Using Java

Copy the below java program and execute it with the help of Java compiler to see the output. At the end of this tutorial, I have shared some execution results.

public class RemoveDuplicateInArray {

public static int removeDuplicateElement(int arr[], int n)
{
    if (n==0 || n==1)
        return n;
  
    int[] temp = new int[n];
    int j = 0;
    for (int i=0; i<n-1; i++)
        if (arr[i] != arr[i+1])
            temp[j++] = arr[i];
     
    temp[j++] = arr[n-1];   
     
    // Changing original array
    for (int i=0; i<j; i++)
        arr[i] = temp[i];
  
    return j;
}
 
public static void main (String[] args) 
{
    int arr[] = {60,20,60,30,40,40,50,50};
    int length = arr.length;
     
    length = removeDuplicateElement(arr, length);
    //printing array elements
    for (int i=0; i<length; i++)
       System.out.print(arr[i]+" ");
}

}

public class RemoveDuplicateInArray {

public static int removeDuplicateElement(int arr[], int n)

{

if (n==0 || n==1)

return n;

int[] temp = new int[n];

int j = 0;

for (int i=0; i<n-1; i++)

if (arr[i] != arr[i+1])

temp[j++] = arr[i];

temp[j++] = arr[n-1];

// Changing original array

for (int i=0; i<j; i++)

arr[i] = temp[i];

return j;

}

public static void main (String[] args)

{

int arr[] = {60,20,60,30,40,40,50,50};

int length = arr.length;

length = removeDuplicateElement(arr, length);

//printing array elements

for (int i=0; i<length; i++)

System.out.print(arr[i]+" ");

}

Program Output

60 20 60 30 40 50

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How to Remove Duplicate Element in an Array Using Java

How to Remove Duplicate Element in an Array Using Java

Program Output

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