This is how I implement Comparator

gistfile1.java

public static class MyComparator implements Comparator<MyClass> {
    @Override
    public int compare(MyClass obj1, MyClass obj2) {
        int value1 = obj1.getValue();
        int value2 = obj2.getValue();
        
        // Dumb way
        if (value1 == value2) {
            return 0;
        } else if (value1 > value2) {
            return 1;
        } else {
            return -1;
        }
        
        // LOOKS-LIKE-Cool way (but not safe)
        // Suffers from overflow when value2 is Integer.MAX_VALUE
        return value1 - value2;
        
        // Best way
        return Integer.compare(value1, value2)
    }
}