.java

int[] findTheNumbers(int[] a) {
    
    int[] theNumbers = new int[2];
    Arrays.sort(a);
    int matchedNumbers = 0;
    
    while (matchedNumbers < 2) {
        for (int i=0; i < a.length; i++) {
            if (a[i] != a[i+1]) {
                theNumbers[matchedNumbers] = a[i];
                matchedNumbers++;
            }
        }
    }
    return theNumbers;