Question

Read 20 integers into an array. Next, use the unique algorithm to reduce the array to the unique values entered by the user. Use the copy algorithm to display the unique values.

Answer 1

public class RemoveDuplicatesArray {

    public static int[] removeDuplicates(int[] originalArray) {
        int uniqueLength = 0;
        boolean duplicateFound;
        for (int i = 0; i < originalArray.length; ++i) {
            duplicateFound = false;
            for (int j = 0; j < i; ++j) {
                if (originalArray[i] == originalArray[j]) duplicateFound = true;
            }
            if (!duplicateFound) {
                uniqueLength++;
            }
        }
        int[] result = new int[uniqueLength];
        int ind = 0;
        for (int i = 0; i < originalArray.length; ++i) {
            duplicateFound = false;
            for (int j = 0; j < i; ++j) {
                if (originalArray[i] == originalArray[j]) duplicateFound = true;
            }
            if (!duplicateFound) {
                result[ind++] = originalArray[i];
            }
        }
        return result;
    }

    public static void main(String[] args) {
        int[] arr = {6, 5, 6, 2, 4, 2, 7};
        int[] unique = removeDuplicates(arr);
        System.out.print("Array after removing duplicates is: ");
        for (int i = 0; i < unique.length; ++i) {
            System.out.print(unique[i] + " ");
        }
        System.out.println();
    }

}