扫雷游戏空白格子可展开但数字格子无法展开问题求助

Hey Julio, I see exactly what's going on here—your current code only handles revealing blank cells (mineCount = 0) and completely skips over numbered cells. Let's break this down and fix it:

The Root Problem #

Looking at your conditional logic:

else if(cell.getMineCount() == 0 && !(cell.isRevealed())){
    cell.reveal();
    // recursive calls here
}

This code only triggers when the cell is blank and not revealed. Numbered cells (where mineCount > 0) never get their reveal() method called, which is why they stay hidden when clicked.

The Fixed Code #

Here's how to adjust your method to handle both blank and numbered cells correctly:

public void revealCells(int row, int column) {
    // First, check if we're out of bounds—exit immediately if so
    if (row < 0 || row >= cells.length || column < 0 || column >= cells[0].length) {
        return;
    }
    
    Cell cell = cells[row][column];
    
    // Exit if it's a mine or already revealed (prevents redundant work/loops)
    if (cell instanceof MineCell || cell.isRevealed()) {
        return;
    }
    
    // Reveal the current cell—this works for both numbered and blank cells!
    cell.reveal();
    
    // Only recursively reveal neighbors if this is a blank cell (mineCount = 0)
    if (cell.getMineCount() == 0) {
        revealCells(row-1, column-1);
        revealCells(row-1, column);
        revealCells(row-1, column+1);
        revealCells(row, column-1);
        revealCells(row, column+1);
        revealCells(row+1, column-1);
        revealCells(row+1, column);
        revealCells(row+1, column+1);
    }
}

Key Changes Explained #

1. Early Exit for Already Revealed Cells: Added a check for cell.isRevealed() to avoid re-processing cells we've already shown.
2. Unified Reveal Step: Moved cell.reveal() outside the conditional—now every valid non-mine cell gets revealed immediately when this method runs on it.
3. Recursion Only for Blanks: We still only recurse to neighboring cells if the current cell is blank (since numbered cells shouldn't trigger a chain reveal).

This way, when you click a numbered cell, it will reveal itself, and when you click a blank cell, it will reveal itself and all connected blank/numbered neighbors just like standard Minesweeper.

内容的提问来源于stack exchange，提问作者Julio