相关疑难解决方法(0)

我有下面的代码.

一切正常,但令人讨厌的是,while循环中的打印行命令运行两次.有(我已经测试过),队列中只有唯一的项目,没有重复项.

public void paint(Graphics g) {

    boolean isParent;

    int drawCount = 1;

    int x = 0, y = 0, width = 0, height = 0;
    Color colour;

    while (!qtreeQueue.empty()) {

        drawNode = (QuadTreeNode) qtreeQueue.deque();
        isParent = drawNode.getIsParent();

        if (!isParent) {
            x = drawNode.getRectangle().x;
            y = drawNode.getRectangle().y;
            width = drawNode.getRectangle().width;
            height = drawNode.getRectangle().height;
            colour = getRectangleColour(drawNode);
            System.out.println(drawCount + ". Drawing: x = " + x + "; y = " + y + 
                    "; width = " + …