java 如何将长字符串放入 JLabel
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How to fit a long String into a JLabel
提问by Tobias Moe Thorstensen
as the title says: I need to fit a JLabel into a JFrame, but the text in the JLabel are too long, so I need to add some linebreaks. The text in the JLabel are obtained from an online XML file, so i cant just change the text to contain linebreaks.
正如标题所说：我需要将 JLabel 放入 JFrame 中，但 JLabel 中的文本太长，因此我需要添加一些换行符。JLabel 中的文本是从在线 XML 文件中获取的，因此我不能将文本更改为包含换行符。
This code extracts data from the XML-file
此代码从 XML 文件中提取数据
Element element = (Element)nodes1.item(i);
String v?r = getElementValue(element,"body");
String v = v?r.replaceAll("<.*>", "" );
String forecast = "V?r: " + v;
in this case the string I want to add some linebreaks to the string v. The String v contains the parsed data from the xml file. The String forecast is returned and set as a text to the JLabel.
在这种情况下，我想向字符串 v 添加一些换行符的字符串。字符串 v 包含来自 xml 文件的解析数据。返回字符串预测并将其设置为 JLabel 的文本。
Just ask if something is uncleared, thanks in advance!
请问有什么不清楚的地方，先谢谢了！
回答by tskuzzy
I suggest using a JTextAreainstead and turning wrapping on. The only way to do it in a JLabelis to put line breaks <br />, which wouldn't work (at least not easily) in your situation if you don't know the text beforehand.
我建议使用 aJTextArea代替并打开包装。在 a 中做到这一点的唯一方法JLabel是放置换行符<br />，如果您事先不知道文本，这在您的情况下将不起作用（至少不容易）。
JTextAreais much more flexible. By default it looks different, but you can fiddle around with some of the display properties to make it look like a JLabel.
JTextArea灵活得多。默认情况下，它看起来不同，但您可以调整一些显示属性，使其看起来像JLabel.
A simple modifiedusage example taken from the How to Use Text Areastutorial -
取自How to Use Text Areas教程的简单修改使用示例-
public class JTextAreaDemo {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI(){
final JFrame frame = new JFrame("JTextArea Demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
JTextArea textArea = new JTextArea(
"If there is anything the nonconformist hates worse " +
"than a conformist, it's another nonconformist who " +
"doesn't conform to the prevailing standard of nonconformity.",
6,
20);
textArea.setFont(new Font("Serif", Font.ITALIC, 16));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setOpaque(false);
textArea.setEditable(false);
panel.add(textArea);
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
}
回答by Thomas
JLabel is able to display HTML text, i.e. if you wrap your text with <html>your text<html>it might be able to wrap the text. That's not tested though, so YMMV.
JLabel 能够显示 HTML 文本，即如果您用<html>your text<html>它包裹文本，它可能能够包裹文本。不过这还没有经过测试，所以 YMMV。
回答by othman
you can dynamically tell your JLabel to resize itself to fit the text.
您可以动态地告诉您的 JLabel 调整自身大小以适应文本。
if you are not using a LayoutManager try :
如果您没有使用 LayoutManager 尝试：
jLabel.setText ("A somewaht long message I would not want to
stop");
jLabel.setSize(jLabel.getPreferredSize());
If you are using a Layout Manager this snippet should work:
如果您使用的是布局管理器，此代码段应该可以工作：
jLabel.setText ("A somewaht long message I would not want to
stop");
jLabel.validate();
