密码锁java

Question

对于我的程序，我想模拟一个密码锁。所以我要求用户将组合锁更改为一个新的3位数组合，但我不知道我哪里出错它似乎留在（0,0,0）

public class Lock
{
private int xCombo;
private int yCombo;
private int zCombo;
private int top = 0;
public static boolean locked = false;

public Lock()
{
    xCombo = 0;
    yCombo = 0;
    zCombo = 0;
}

public void alter(int x, int y, int z)
{
    xCombo = x;
    yCombo = y;
    zCombo = z;

从我的演示课

public class LockDemo
{
public static void main(String [] arg)
{
    lockMenu();
}
public static void lockMenu()
{
    int x, y, z;
    Scanner kb = new Scanner(System.in);
    Lock newLock = new Lock();

    System.out.println("\nSelect an option for the lock.\n");
    System.out.println("    A : Set a new lock combination. ");
    System.out.println("    B : Close the lock.");
    System.out.println("    C : Attempt to open the lock.");
    System.out.println("    D : Check lock status.");
    System.out.println("    E : Check current top number.");

    char menuOption = kb.next().charAt(0);
    menuOption = Character.toUpperCase(menuOption);

    switch(menuOption)
    {
        case 'A':
        {
            System.out.println("Set a new combination for the lock.\n");

            System.out.println("Enter the first number of the combination.");
            x = kb.nextInt();
            System.out.println("Enter the second number of the combination.");
            y = kb.nextInt();
            System.out.println("Enter the third number of the combination.");
            z = kb.nextInt();

            newLock.alter(x,y,z);
            lockMenu();

感谢您的帮助，如果我需要发布更多我将编辑的代码