专注于CardLayout内的JTextField [英] Get focus on a JTextField inside a CardLayout

问题描述

我在JPanel A内有一个JTextField，它是CardLayout的一部分.当显示此A时，我想将焦点自动设置为JTextField(即，光标在文本字段中闪烁，因此用户无需单击它即可启用输入).我尝试在初始化时在JTextField对象上调用requestFocusInWindow()，但这似乎不起作用.每次显示A时，我都需要调用此方法吗?谢谢.

I have a JTextField inside a JPanel A which is a part of CardLayout. When this A gets shown, I want to set the focus automatically to the JTextField (i.e. the cursor is flashing in the text field so the user doesn't need to click on it to enable the input). I tried calling requestFocusInWindow() on the JTextField object at initialization, but that doesn't seem to work. Do I need to call this method every time when A gets displayed? Thanks.

推荐答案

也许在显示面板时可以尝试requestFocusInWindow()吗?

Maybe you can try requestFocusInWindow() when the panel is shown ?

像这样吗?

    jPanel.addComponentListener(new ComponentAdapter() {
        @Override 
        public void componentShown(java.awt.event.ComponentEvent e) 
        {
            jTextField.requestFocusInWindow();
        }
    });

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