java - 向 Java 程序添加一个在特定点打开和关闭的消息框

Question

我能够自己弄清楚从用户那里获取输入并显示最终产品，但我想添加一条“忙碌”消息，该消息在代码中的某个点显示，然后在代码中的某个点关闭。

希望通过在我的代码中显示它会更容易解释。这是一个排序算法，排序时间显然会有所不同。

public static void main(String[] args) throws Exception{

        //Code that doesn't matter for this question...

        String userInput = JOptionPane.showInputDialog("Please enter the amount of input you would like to test (integer): ");

    // Code that doesn't matter for this question....

    //
    // Open dialogue box here that says, "Busy sorting" and stays open 
    // 
        long startTime = System.currentTimeMillis();
            sort(shorts);
        long endTime = System.currentTimeMillis();

    //
    // The dialogue box closes here without the user having to press anything
    //

    // This displays the final output.
            JOptionPane.showMessageDialog(null, error + "The runtime for " + input + " short integers is " + (endTime-startTime) + " milliseconds.", "Final Runtime", JOptionPane.PLAIN_MESSAGE);

        }

希望这个问题是可以理解的。

Answer 1

您需要使用 SwingWorker 类在 GUI 之外的单独线程上运行长任务。当它运行时，显示 JProgressBar 或类似的东西将是理想的。

http://java.sun.com/products/jfc/tsc/articles/threads/threads2.html