Question

我有一个从我的数据库中查询的项目列表。此列表在每个项目中有两个单词，这两个单词由空格分隔。我现在想要只访问空格后面的最后一个单词。

来自我的数据库的查询

public  List<String> getList(){
    List<String> array = new ArrayList<String>();
    String selectQuery = "SELECT  * FROM " + TABLE_LIST;
    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    ArrayList<ArrayList<String>> row = new ArrayList<ArrayList<String>>();

    if (cursor .moveToFirst()) {
         ;
        do {
            String listName = cursor.getString(cursor.getColumnIndex(ITEM_A));

            array.add(listName);



        }while(cursor.moveToNext());
    }

    cursor.close();
    return array;
}

访问查询中的项目

List<String> m = new ArrayList<String>();
    m = dbHelper.getList();


 System.out.println(m);

这给出了以下输出

[itemOA AITEME,itemOD BITEMD,itemOC CITEMS, itemOB DTEM]

但我希望得到列表的最后一句话，

   [AITEME, BITEMD, CITEMS ,DTEM]

感谢您的帮助。

Answer 1

我认为您可以重新构建代码以避免必须执行此操作，但是：

class GameScene: SKScene {

    var foreground: SKNode!
    var hud: SKNode!
    var firstBall: SKNode!

    var scoreLabel: SKLabelNode!

    private var score = 0
    override func didMoveToView(view: SKView) {


        scoreLabel = SKLabelNode(fontNamed:"Geared-Slab")
        scoreLabel.fontColor = UIColor.blackColor()
        scoreLabel.position = CGPoint( x: self.frame.midX, y: 3 * self.frame.size.height / 4 )
        scoreLabel.fontSize = 100.0
        scoreLabel.zPosition = 100
        scoreLabel.text = String(score)
        self.addChild(scoreLabel)
    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        for touch: AnyObject in touches {
            let location = touch.locationInNode(self)
            if(firstBall.containsPoint(location)) {
                firstBall.physicsBody?.velocity = CGVectorMake(0, 600)
                firstBall.physicsBody?.applyImpulse(CGVectorMake(0, 1100))


            }
            if
                let touch : UITouch! = touches.first,
                let tappedSprite = nodeAtPoint(touch!.locationInNode(self)) as? SKSpriteNode,
                let scoreLabel = childNodeWithName("scoreLabel") as? SKLabelNode
                where tappedSprite.name == "ballPoints" {
                score += 1
                scoreLabel.text = "Score: \(score)"
            }
        }
    }

    override init(size:CGSize) {
        super.init(size: size)

        foreground = SKNode()
        addChild(foreground)


        //1st Ball//
        firstBall = createPlayer()
        foreground.addChild(firstBall)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}

只要你总是有一个已知的起点（如果它始终以“itemOA”或6个字符+一个空格开头）就会工作

如何从查询列表中的单词访问最后一个单词

1 个答案: