﻿ Java - Find the new length of a given sorted array

# Java: Find the new length of a given sorted array

## Java Basic: Exercise-132 with Solution

Write a Java program to find the updated length of a given sorted array where duplicate elements appear at most twice.

Pictorial Presentation: Sample Solution:

Java Code:

``````import java.util.Arrays;

class Solution {
// Static method to remove duplicates from the given array, allowing at most two duplicates
static int remove_Duplicates_twice(int[] nums) {
// Check for invalid or empty input array
if (nums == null || nums.length == 0) {
return 0;
}

int index = 1; // Initialize the index for the resulting array
for (int i = 2; i < nums.length; i++) {
// Check if the current element is different from the element at 'index',
// or if it's the second occurrence of a duplicate, but not the third
if (nums[i] != nums[index] || (nums[i] == nums[index] && nums[i] != nums[index - 1])) {
index++; // Increment the index for the resulting array
nums[index] = nums[i]; // Copy the unique or second occurrence of a duplicate element
}
}
// The new length of the array is one more than the 'index'
return index + 1;
}

/* Driver program to test above functions */
public static void main(String[] args) {
int[] nums = {1, 1, 2, 3, 3, 3, 4, 5, 6, 7, 7, 7, 7};
System.out.println("Original array: " + Arrays.toString(nums));
System.out.println("The length of the original array is: " + nums.length);
System.out.println("After removing duplicates, the new length of the array is: " + remove_Duplicates_twice(nums));
}
}
```
```

Sample Output:

```Original array: [1, 1, 2, 3, 3, 3, 4, 5, 6, 7, 7, 7, 7]
The length of the original array is: 13
After removing duplicates, the new length of the array is: 10
```

Flowchart: Java Code Editor:

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