Swing 组件不显示 [英] Swing components not displaying

问题描述

我以前在使用 Java swing 时遇到过这个问题很多次.我运行程序，除了窗口什么也没有显示；即使将其大小调整一个像素，一切都会完美呈现.谁能告诉我为什么会这样?
谢谢.

I've had this problem many times before while using Java swing. I run the program, and nothing at all displays but the window; the moment you resize it even by a pixel, everything appears perfectly. Could anyone please tell me why this is happening?
Thanks.

推荐答案

总是从 invokeLater()，使用布局管理器，pack() 框架并使 setVisible() last.

EventQueue.invokeLater(new Runnable() {

    @Override
    public void run() {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel(new GridLayout(0, 1));
        panel.add(...);
        panel.add(...);
        f.add(new JScrollPane(panel));
        f.pack();
        f.setVisible(true);
    }
});

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