While loop exiting before computation because of datatypes

Question

My program specifications are as follows. 1. All four digits are different 2. The digit in the thousands place is three times the digit in the tens place 3. The number is odd. 4

Answer 1

I believe this can be simplified significantly by looking at the given inequalities, soemthing like

// thousands + hundreds + tens + ones == 27
// thousands = tens * 3, or tens = thousands / 3
// thousands = 3, 6 or 9
public static void main(String[] args) {
    // thousands = tens * 3; so it must be a multiple of 3.
    for (int thousands = 3; thousands < 10; thousands += 3) {
        for (int hundreds = 0; hundreds < 10; hundreds++) {
            if (hundreds == thousands) {
                continue;
            }
            // thousands = tens * 3; so the reverse is also true
            int tens = thousands / 3;
            if (tens == hundreds) {
                continue;
            }
            // All of the digits sum to 27.
            int ones = 27 - thousands - hundreds - tens;
            if (ones > 9 || ones % 2 != 0 || ones == tens
                    || ones == hundreds || ones == thousands) {
                continue;
            }
            int val = (thousands * 1000) + (hundreds * 100) + (tens * 10)
                    + ones;
            System.out.println(val);
        }
    }
}

Of course, the output is still

9738