游戏开发：如何编写处理行数可变的tab数组的方法？

Hey there! Let's work through how to build methods that handle variable-length (or variable-row) tab[] Integer arrays for your puzzle game—since you've already got your arrayFactory set up and 6 levels mapped with switch cases, this should slot right in seamlessly.

1. Build Generic Array Utility Methods #

The core idea is to decouple your array operations from specific level data. Don't write separate shuffle, validation, or manipulation methods for each level—instead, create reusable tools that work with any Integer array, regardless of its length or number range.

Here's a simple utility class you can use (or fold these methods into your existing game logic class):

import java.util.Random;

public class ArrayUtils {

    // Fairly shuffle any Integer array using Fisher-Yates algorithm (efficient and unbiased)
    public static void shuffle(Integer[] array) {
        Random random = new Random();
        for (int i = array.length - 1; i > 0; i--) {
            int swapIndex = random.nextInt(i + 1);
            // Swap elements
            Integer temp = array[swapIndex];
            array[swapIndex] = array[i];
            array[i] = temp;
        }
    }

    // Check if an array is sorted in ascending order (core win condition for your game)
    public static boolean isSorted(Integer[] array) {
        for (int i = 0; i < array.length - 1; i++) {
            if (array[i] > array[i + 1]) {
                return false;
            }
        }
        return true;
    }

    // Swap two elements in the array (for handling player move logic)
    public static void swapElements(Integer[] array, int indexA, int indexB) {
        // Guard against invalid user input/indices
        if (indexA < 0 || indexA >= array.length || indexB < 0 || indexB >= array.length) {
            throw new IllegalArgumentException("Index out of bounds!");
        }
        Integer temp = array[indexA];
        array[indexA] = array[indexB];
        array[indexB] = temp;
    }

    // Get min/max values of the array (for UI hints or level validation checks)
    public static int[] getRange(Integer[] array) {
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for (Integer num : array) {
            min = Math.min(min, num);
            max = Math.max(max, num);
        }
        return new int[]{min, max};
    }
}

2. Integrate with Your Level Switch Logic #

Since you're using a switch case to grab the currentArray from your arrayFactory instances, you can pass that array directly to the utility methods—no changes needed for different levels:

// Example: After selecting your current level's array via switch
Integer[] currentArray = ...; // From your arrayFactory for the active level

// Shuffle the array when the level starts
ArrayUtils.shuffle(currentArray);

// After a player makes a move (e.g., swapping elements at indices 2 and 5)
ArrayUtils.swapElements(currentArray, 2, 5);

// Check if the player has completed the level
if (ArrayUtils.isSorted(currentArray)) {
    System.out.println("Level cleared! Moving to next stage.");
    // Handle level progression logic here
}

// Optional: Get the array's number range for UI display
int[] levelRange = ArrayUtils.getRange(currentArray);
System.out.println("Current level uses numbers from " + levelRange[0] + " to " + levelRange[1]);

3. If You're Working with 2D Variable-Row Arrays #

If your tab is a 2D array (with variable rows, e.g., Integer[][] tab), you can extend the utility methods to handle this without rewriting core logic:

// Shuffle every row in a 2D array
public static void shuffle2D(Integer[][] tab) {
    for (Integer[] row : tab) {
        shuffle(row); // Reuse the existing 1D shuffle method
    }
}

// Check if all rows in a 2D array are sorted
public static boolean is2DSorted(Integer[][] tab) {
    for (Integer[] row : tab) {
        if (!isSorted(row)) {
            return false;
        }
    }
    return true;
}

Quick Optimization Tips #

• Keep your arrayFactory focused solely on generating arrays—don't mix in manipulation logic. This makes it easy to add new levels later (like a 7th level) without touching your operation methods.
• If you need to track state per level (like move counts), wrap the currentArray in a LevelState class that holds the array, move count, and level metadata. This keeps your game logic clean and organized.

内容的提问来源于stack exchange，提问作者Patroy