在Swing Java中向JList添加元素 [英] Adding elements to JList in Swing Java

问题描述

我有一个单击按钮时执行的功能。假设有一个循环将1到10加到 JList 。我将该数据添加到 DefaultListModel 。它完美地运行并且数字被添加。然后我在循环中添加了一个 Thread.sleep（1000）。但输出是不同的。我想每秒添加1个元素。但现在它等待10秒，并在第10秒结束时将所有1到10加在一起。我在哪里错了？

I have a function that executes when a button is clicked. Suppose there is a loop to add 1 to 10 to a JList. I add that data to DefaultListModel. It works perfectly and the numbers get added. Then I added a Thread.sleep(1000) within the loop. But the output is different. I wanted to add 1 element every second. But now it waits for 10secs and the add all 1 to 10 together at the end of 10th second. Am I wrong anywhere?

List processList = listNumbers.getSelectedValuesList();
DefaultListModel resultList = new DefaultListModel();
listResult.setModel(resultList);

for (int i = 0; i < processList.size(); i++) {
    resultList.addElement(String.valueOf(i));
    try {
        Thread.sleep(1000);
    }
    catch (InterruptedException ex) {
    }
}

推荐答案

您应该在单独的线程中更新列表，否则最终会阻止事件派发线程。

You should update your list in a separate thread otherwise you end up blocking the event dispatch thread.

尝试以下：

final DefaultListModel model = new DefaultListModel();
final JList list = new JList(model);

//another thread to update the model
final Thread updater = new Thread() {
    /* (non-Javadoc)
     * @see java.lang.Thread#run()
     */
    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            model.addElement(i);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }
};
updater.start();

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