java swing从另一个线程从JTextField获取值

Question

I know that if I need to change JTextField value from a different thread I need to use SwingUtilities.invokeLater() call. But if I need to get that value from a different thread, can I just use textfield.getText() or I need to use some sort of invokeLater call? Thanks.

Answer 1

如果您对getText（）调用的结果可能不确定（即无序）感到满意，那么可以允许使用其他线程来获取值。

Answer 2

Even something as simple as getText() should be called from the event dispatch thread.

If you're in another thread, you can use invokeAndWait :

final String[] textHolder = { null };

EventQueue.invokeAndWait(new Runnable() {
    @Override
    public void run() {
        textHolder[0] = someTextField.getText();
    }
});

String text = textHolder[0];