Java Array Exercises: Remove the duplicate elements of a given array and return the new length of the array

Java Array: Exercise-33 with Solution

Write a Java program to remove the duplicate elements of a given array and return the new length of the array.
Sample array: [20, 20, 30, 40, 50, 50, 50]
After removing the duplicate elements the program should return 4 as the new length of the array.

Pictorial Presentation:

Sample Solution:

Java Code:

public class Exercise33 {    
   public static void main(String[] args) {
        int nums[] = {20, 20, 30, 40, 50, 50, 50};  
		System.out.println("Original array length: "+nums.length);
		System.out.print("Array elements are: ");
       for (int i = 0; i < nums.length; i++)
        {
            System.out.print(nums[i]+" ");
        }
		System.out.println("\nThe new length of the array is: "+array_sort(nums));
			
    }
    
    public static int array_sort(int[] nums) {
         int index = 1;
        for (int i = 1; i < nums.length; i++) {
            if (nums[i] != nums[index-1])
                nums[index++] = nums[i];
        }
	  return index;
    }
}

Sample Output:

                                                                              
Original array length: 7                                               
Array elements are: 20 20 30 40 50 50 50                               
The new length of the array is: 4

Flowchart:

Java Code Editor:

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