如何防止 Java Swing BoxLayout 中的 JTextFields 扩展？
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How do I keep JTextFields in a Java Swing BoxLayout from expanding?
提问by Matthew
I have a JPanelthat looks something like this:
我有一个JPanel看起来像这样的：
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
...
panel.add(jTextField1);
panel.add(Box.createVerticalStrut(10));
panel.add(jButton1);
panel.add(Box.createVerticalStrut(30));
panel.add(jTextField2);
panel.add(Box.createVerticalStrut(10));
panel.add(jButton2);
... //etc.
My problem is that the JTextFields become huge vertically. I want them to only be high enough for a single line, since that is all that the user can type in them. The buttons are fine (they don't expand vertically).
我的问题是JTextFields 在垂直方向上变得很大。我希望它们只对一行来说足够高，因为这是用户可以输入的全部内容。按钮很好（它们不会垂直扩展）。
Is there any way to keep the JTextFields from expanding? I'm pretty new to Swing, so let me know if I'm doing everything horribly wrong.
有什么办法可以防止JTextFields 扩大？我是 Swing 的新手，所以如果我做的一切都非常错误，请告诉我。
采纳答案by camickr
textField = new JTextField( ... );
textField.setMaximumSize( textField.getPreferredSize() );
回答by Randy
set the max height. or put them in a scroll region
设置最大高度。或将它们放在滚动区域
回答by cbrown
If you want the width to keep changing, just keep it set to MAX INT. So...
如果您希望宽度不断变化，只需将其设置为 MAX INT。所以...
textField.setMaximumSize(
new Dimension(Integer.MAX_VALUE, textField.getPreferredSize().height) ); 回答by Zhang Yujiao
JPanel panel = new JPanel();
Box box = Box.createVerticalBox();
JTextField tf = new JTextField(8);
box.add(tf);
panel.add(box);
frame.getContentPane().add(panel, BorderLayout.CENTER);
回答by damix911
In my case I need a combination of all the answers for it to work properly. If I don't use glue, it is not centered vertically; if I don't restrict maximum size, it extends vertically; if I restrict both width and height, it is too small, being only wide enough to contain the initialization text.
在我的情况下，我需要所有答案的组合才能正常工作。如果我不使用胶水，它就不会垂直居中；如果我不限制最大尺寸，它会垂直延伸；如果我同时限制宽度和高度，它就太小了，宽度只能包含初始化文本。
textField = new JTextField("Hello, world!");
textField.setMaximumSize(
new Dimension(Integer.MAX_VALUE,
textField.getPreferredSize().height));
Box box = Box.createVerticalBox();
box.add(Box.createVerticalGlue());
box.add(textField);
box.add(Box.createVerticalGlue());
