java 设置 JTextArea 的固定宽度,而高度应根据其内容自动调整
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/11018845/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Setting fixed width of JTextArea while height should be automatically adjusted to its content
提问by Michal Vician
When I run the sample code below the width of JTextArea is fixed (100px) while its height is dynamically adjusted as I type some text in it.
当我在 JTextArea 的宽度下方运行示例代码时,它的宽度是固定的(100px),而当我在其中输入一些文本时,它的高度会动态调整。
So for example I start with this:
例如,我从这个开始:
--------------------
| some text |
--------------------
and as I type more text the height of JTextArea expands so it fits the content while preserving the width:
当我输入更多文本时,JTextArea 的高度会扩展,以便在保留宽度的同时适合内容:
--------------------
| some text, some |
| other longer text|
| etc... |
--------------------
How can I double the width of JTextArea?
When I do it by changing preferredSize
the height is not dynamic anymore.
如何将 JTextArea 的宽度加倍?当我通过改变preferredSize
高度来做到这一点时,它不再是动态的。
public class TestTextArea extends JFrame {
public static void main(String[] args) {
new TestTextArea().setVisible(true);
}
public TestTextArea() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(0,0,800,600);
setContentPane(createPane());
}
protected Container createPane() {
JTextArea textArea = createTextArea();
// ------------------------------------------
// UNCOMMENT TO DOUBLE THE WIDTH OF JTextArea
// Dimension oldPrefSize = textArea.getPreferredSize();
// Dimension newPrefSize = new Dimension(oldPrefSize.width * 2, oldPrefSize.height);
// textArea.setPreferredSize(newPrefSize);
JPanel pane = new JPanel(new FlowLayout());
pane.add(textArea);
return pane;
}
protected JTextArea createTextArea() {
JTextArea textArea = new JTextArea();
textArea.setWrapStyleWord(true);
textArea.setLineWrap(true);
return textArea;
}
}
采纳答案by Robin
Use the JTextArea#setColumns
method to adjust the width
使用JTextArea#setColumns
方法调整宽度
回答by Ahmad Moussa
set linewrap to true => textArea.setLineWrap(true); this will make the maximum line width = textarea with
将换行设置为 true => textArea.setLineWrap(true); 这将使最大线宽 = textarea 与
回答by user3015208
Change this line of code textArea.setPreferredSize(newPrefSize); to textArea.setSize(newPrefSize); The height will be dynamically adjusted.
更改这行代码 textArea.setPreferredSize(newPrefSize); 到 textArea.setSize(newPrefSize); 高度将动态调整。