if (( (startX - endX) == 1 && (startY - endY) == 1 ) ||
                ( (startX - endX) == 1 && (startY - endY) == 0 ) ||
                ( (startX - endX) == 1 && (startY - endY) == -1 ) ||
                ( (startX - endX) == 0 && (startY - endY) == 1 ) ||
                ( (startX - endX) == 0 && (startY - endY) == -1 ) ||
                ( (startX - endX) == -1 && (startY - endY) == 1 ) ||
                ( (startX - endX) == -1 && (startY - endY) == 0 ) ||
                ( (startX - endX) == -1 && (startY - endY) == -1 ))))

ArrayList<Point> kingMoveRange = new ArrayList<Point>();

    kingMoveRange.add(new Point(1, 0));
    kingMoveRange.add(new Point(0, -1));
    kingMoveRange.add(new Point(0 , 1));
    kingMoveRange.add(new Point(-1, -1));
    kingMoveRange.add(new Point(-1, 1));
    kingMoveRange.add(new Point(1, -1));
    kingMoveRange.add(new Point(1, 1));

"If (startX - endX) and (startY - endY) matches ANY one of the pairs in the list "