J2ME 連連看遊戲核心邏輯與界面實現（含完整註釋源碼）

經典 J2ME 連連看（Link Game）核心代碼，包含 Canvas 界面繪製、遊戲邏輯引擎、連線判定演算法（直連、一折、兩折、邊界延伸），適合學習行動裝置遊戲開發基礎。

架構概覽

• LinkCanvas extends Canvas implements Runnable：繪製、按鍵處理、主迴圈
• GameEngine：地圖數據、選擇狀態、連線判定、繪製輔助

界面類：LinkCanvas

public class LinkCanvas extends Canvas implements Runnable {
    private GameEngine engine;
    private int width, height;

    public LinkCanvas() {
        engine = new GameEngine();
        width = getWidth(); height = getHeight();
        new Thread(this).start();
    }

    protected void paint(Graphics g) {
        clearScreen(g);
        engine.paintMap(g);
        engine.paintSelectArea(g);
        engine.paintLinkLine(g);
    }

    private void clearScreen(Graphics g) {
        g.setColor(0xFFFFFF); g.fillRect(0, 0, width, height); g.setColor(0);
    }

    public void keyPressed(int keyCode) {
        switch (getGameAction(keyCode)) {
            case UP: engine.moveUP(); break;
            case DOWN: engine.moveDown(); break;
            case LEFT: engine.moveLeft(); break;
            case RIGHT: engine.moveRight(); break;
            case FIRE: engine.fire(); break;
        }
    }

    public void run() {
        try {
            while (true) { Thread.sleep(100); engine.action(); repaint(); }
        } catch (Exception e) { e.printStackTrace(); }
    }
}

邏輯類：GameEngine 核心演算法

地圖初始化（10x10，10 種圖案，打亂 10 輪）

private final int MAX_ROW = 10, MAX_COL = 10;
private int[][] map = new int[MAX_ROW][MAX_COL];
private Random ran = new Random();

private void initMap() {
    for (int r=0;r<MAX_ROW;r++) for (int c=0;c<MAX_COL;c++) map[r][c] = r+1;
    for (int i=0;i<10;i++) for (int r=0;r<MAX_ROW;r++) for (int c=0;c<MAX_COL;c++) {
        int tr = Math.abs(ran.nextInt()%10), tc = Math.abs(ran.nextInt()%10);
        if (tr!=r || tc!=c) { int tmp=map[r][c]; map[r][c]=map[tr][tc]; map[tr][tc]=tmp; }
    }
}

連線判定核心

// 連線類型常數
private static final int NO_LINK=0, H_LINK=1, V_LINK=2, ONE_CORNER_X=3, ONE_CORNER_Y=4, TWO_CORNER=5;
private int linkType; private int[] p = new int[4]; // 兩折轉折點座標

private int logic() {
    if (map[firstRow][firstCol] != map[secondRow][secondCol]) return NO_LINK;
    if (isEmptyRow(firstRow,firstCol,secondRow,secondCol)) return H_LINK;
    if (isEmptyCol(firstRow,firstCol,secondRow,secondCol)) return V_LINK;
    int r = isOneCornerLink(firstRow,firstCol,secondRow,secondCol);
    if (r != NO_LINK) return r;
    if (isTwoCornerLink(firstRow,firstCol,secondRow,secondCol)) return TWO_CORNER;
    return NO_LINK;
}

// 同行/同列無阻擋
private boolean isEmptyRow(int r1,int c1,int r2,int c2) { /* 略 */ }
private boolean isEmptyCol(int r1,int c1,int r2,int c2) { /* 略 */ }

// 一折：轉折點為空且兩段均通
private int isOneCornerLink(int r1,int c1,int r2,int c2) {
    if (isEmptyCell(r1,c2) && isEmptyRow(r1,c1,r1,c2) && isEmptyCol(r1,c2,r2,c2)) return ONE_CORNER_X;
    if (isEmptyCell(r2,c1) && isEmptyCol(r1,c1,r2,c1) && isEmptyRow(r2,c1,r2,c2)) return ONE_CORNER_Y;
    return NO_LINK;
}

// 兩折：從首塊四方向延伸，每步嘗試一折連接終點，含邊界外延伸
private boolean isTwoCornerLink(int r1,int c1,int r2,int c2) { /* 詳見源碼 */ }

消除與狀態重置

public boolean action() {
    if (selectTileNum != 2) return false;
    linkType = logic();
    if (linkType != NO_LINK) {
        map[firstRow][firstCol] = 0;
        map[secondRow][secondCol] = 0;
        selectTileNum = 0;
        return true;
    }
    selectTileNum = 0;
    return false;
}

繪製細節

• 格子大小 20x20，左上角 (20,50)
• 選擇框黃色，已選塊紅框
• 連線繪製連接格子中心點，依連線類型分段繪製

完整源碼含詳細中文註釋，可直接作為 J2ME 遊戲開發教學範例或二次開發基礎。