java中文本区域的大小
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Size of Text Area in java
提问by seal
I am writing a code for basic GUI. There i need a Text Area. But i can not make the Text Area in my desirable size. i use setPreferredSizemethod to set the dimension of the Text Area. But it did not work. I also tried setSizemethod but did not work also. Here is my written code.
我正在为基本的 GUI 编写代码。我需要一个文本区域。但是我无法按照我想要的大小制作文本区域。我使用setPreferredSize方法来设置文本区域的尺寸。但它没有用。我也尝试过setSize方法，但也没有奏效。这是我写的代码。
private void textArea() {
setTitle("TextArea");
setSize(700, 500);
setLayout(new BorderLayout());
JTextArea textArea = new JTextArea();
textArea.setPreferredSize(new Dimension(100,100));
System.out.println(textArea.getSize());
textArea.setBackground(Color.GREEN);
textArea.setLineWrap(true);
textArea.setWrapStyleWord(false);
add(textArea,BorderLayout.CENTER);
}
采纳答案by Ben Dale
setPreferredSize won't always work, plus, it's strongly advised that you use the built in layout managers to deal with any sizing issues.
setPreferredSize 并不总是有效，另外，强烈建议您使用内置的布局管理器来处理任何大小问题。
Try and set the columns and rows on the text area:
尝试在文本区域设置列和行：
new JTextArea(5, 10);
回答by Enigma
PreferredSize is what it say what it is: a preferred size. The border layout determines the actual size (taking the preferred size into considerations).
PreferredSize 就是它所说的：首选大小。边框布局决定了实际尺寸（考虑首选尺寸）。
See: http://docs.oracle.com/javase/tutorial/uiswing/layout/border.html
请参阅：http: //docs.oracle.com/javase/tutorial/uiswing/layout/border.html
Consider other layouts to get your desired size. E.G. flowLayout: http://docs.oracle.com/javase/tutorial/uiswing/layout/flow.html
考虑其他布局以获得所需的尺寸。EG flowLayout：http://docs.oracle.com/javase/tutorial/uiswing/layout/flow.html
