Question

Here's my code; https://gist.github.com/anonymous/b8ef69a391c6c4e37b92

I've tried placing the "label1.setText("Bouncing bouncing ball" + bounceCount);" into the main method, but of course the variable bounceCount is a class variable and cannot be used inside the main method, is there any way around this?

Answer 1

这里有两个选择。

添加“getter”＆＃39;你的游戏课中的方法。

    private readonly HashSet<char> _operators = new HashSet<char>() { '+', '*', '-', '/' };

    void AppendOperator(string operation)
    {
        char lastChar = Result.Text.LastOrDefault();
        if (_operators.Contains(lastChar)) return;

        Result.Text = num.ToString() + operation;
    }

然后：

public int getBounceCount() {
    return bounceCount;
}

你的第二个选择（以及更好的选择）是让你的主游戏循环在不同的线程中。你甚至可以实现＆＃39; runnable＆＃39;你班上的界面。

   while (true) {
        game.moveBall();
        game.checkBounceCount();
        //JLabel label1 = new JLabel();
        //label1.setText("Bouncing bouncing ball" + game.getBounceCount());
        game.repaint();
        Thread.sleep(10);
    }

然后在主要方法中：

public class Game extends JPanel implements Runnable {
  //...
  public void run() {
    //Your game's main animation loop
    while (true) {
       //Do your thing
    }
  }
}

How can I print a variable into a JPanel and then use the main method to re-print the variable when it changes?

1 个答案: