我应该在 EDT 中分配/创建 swing 元素吗？

我应该在 EDT 中创建 swing 元素吗？

我在编辑非线程安全图形元素时遇到了并发问题，但我正在创建它们，但它们尚未显示，如果它们很多或需要一些时间来分配，这会冻结 GUI，但不会是吗？

下面是我使用 EDT 来显示但不创建 GUI 结构的示例：

public class Launcher {
    private final SwingWorker worker;
    private final JFrame frame;
    private final JLabel label;
    private final JProgressBar progressBar;

    public Launcher() {

        // init user interface
        frame = new JFrame();
        JPanel panel = new JPanel(new BorderLayout());
        label = new JLabel("Launching...", SwingConstants.CENTER);
        progressBar = new JProgressBar(0, 100);
        progressBar.setIndeterminate(true);
        panel.add(label, BorderLayout.CENTER);
        panel.add(progressBar, BorderLayout.PAGE_END);
        initUI(panel);
        worker = new LauncherWorker(this);
        worker.addPropertyChangeListener((PropertyChangeListener)this);
    }

    private void initUI(final Component panel) {
        if (!SwingUtilities.isEventDispatchThread()) {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    DirectaChatLauncher.this.initUI(panel);
                } //run()
            });
            return;
        }
        Container contentPane = frame.getContentPane();
        contentPane.setLayout(new BorderLayout());
        contentPane.add(panel, BorderLayout.PAGE_END);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        if ("progress".equals(evt.getPropertyName())) {
            int progress = (Integer) evt.getNewValue();
            progressBar.setValue(progress);
        }
    }

    private void setProgression(final String msg) {
        label.setText(msg);
    }

    class LauncherWorker extends SwingWorker<Boolean, String> {

        private final Launcher LAUNCHER;

        public LauncherWorker(Launcher launcher) {
            super();
            LAUNCHER = launcher;
        }

        @Override
        protected Boolean doInBackground() throws Exception {
            setProgress(0);
            publish("Started");
            ...
            setProgress(100);
            publish("Launched");
            Thread.sleep(1000);
            return Boolean.TRUE;
        }

        @Override
        protected void process(List<String> chunks) {
            LAUNCHER.setProgression(chunks.get(0));
        }

        @Override
        public void done() {
            LAUNCHER.done();
        }

    }
}

由于元素尚未显示，可以吗？或者我应该全部搬进initUI()?

在秋千上可分离的模型架构 http://www.oracle.com/technetwork/java/architecture-142923.html#separable，视图组件监听其模型。由于视图可能会任意响应模型更新生成的事件，因此相应的模型必须also将在 EDT 上更新。您可以通过以下两种基本方法之一来减少延迟：

• Use EventQueue.invokeLater() https://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html来自单独的线程，如图所示here https://stackoverflow.com/a/7519403/230513.

• Use SwingWorker https://docs.oracle.com/javase/tutorial/uiswing/concurrency/worker.html获得所列举的额外好处here https://stackoverflow.com/a/25526869/230513.