java布尔方法的行为不符合预期，当预期为true时返回false

Question

下面是有问题的代码：

public boolean validMoveRook(int[] start, int[] end) {

    int xDif = end[0]-start[0];
    int yDif = end[1]-start[1];

    if (xDif == 0 ^ yDif == 0) {

        int distance;
        int direction;

        if (xDif == 0) {
            distance = Math.abs(yDif);
            direction = 1;
        }
        else {
            distance = Math.abs(xDif);
            direction = 0;
        }

        for (int i = distance - 1; i >= 0; i--) {
            if (direction == 0) {
                int newX = start[0] + utilities.AbsoluteChange(xDif, -i);
                if (this.board[newX][start[1]] != FREE) return false;
            }
            if (direction == 1) {
                int newY = start[1] + utilities.AbsoluteChange(yDif, -i);
                if (this.board[start[0]][newY] != FREE) return false;
            }

            if (this.board[start[0]][start[1]] == TURN0_WHITEROOK) {
                this.board[start[0]][start[1]] = WHITEROOK;
            }
            if (this.board[start[0]][start[1]] == TURN0_BLACKROOK) {
                this.board[start[0]][start[1]] = BLACKROOK;
            }
        }
        System.out.println("success");
        return true;
    }
    System.out.println("Oh no!");
    return false;
}

我想下一盘棋。问题是，即使在不应该返回false的时候，它仍然返回false。打印“success”时，它仍然返回false。为什么会这样

Answer 1

正如@Gblodgett所指出的，很可能在utilities.AbsoluteChange方法中有一个Sop("success")，并且false就在调用之后返回