在 java 字符串变量上使用 HTML
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Using HTML on java string variables
提问by Ido Fang Bentov
I'm right now working on a simple chat program, and I came up with an issue I couldn't find anywhere in the web, maybe because I didn't use the correct words to describe it.
我现在正在开发一个简单的聊天程序，我想出了一个在网络上找不到的问题，也许是因为我没有使用正确的词来描述它。
So, I want to simply color part of a text I'm appending to a JTextArea using html, but the problem is the part of the text I want to color is stored in a String variable, and I don't know how to apply the html on it.
所以，我想简单地使用 html 为我附加到 JTextArea 的文本的一部分着色，但问题是我想要着色的文本部分存储在一个 String 变量中，我不知道如何应用上面的html。
this is what I'm trying to do in code:
这就是我在代码中尝试做的事情：
String text = new String("Hello");
String htmlText = new String("<html><font color='red'>" + text + "</font></html>");
But the output is <html><font color='red'>Hello</font></html>
但输出是 <html><font color='red'>Hello</font></html>
Thanks, and sorry for my bad English.
谢谢，很抱歉我的英语不好。
Edit
编辑
I have solved the problem.
It was because my textPane.setText()method was
("<html>"+textPane.getText+"<font color='red'>text</font></html>)
我已经解决了这个问题。那是因为我的textPane.setText()方法是
("<html>"+textPane.getText+"<font color='red'>text</font></html>)
I shouldn't have used textPane.getText(), I should have used textPane.getDocument().getText(0, text.getDocument().getLength()).
我不应该用textPane.getText()，我应该用textPane.getDocument().getText(0, text.getDocument().getLength())。
my present code is:
我现在的代码是：
//chatArea is a JTextPane
//mesArea is just a source where I get some text
if (!mesArea.getText().trim().equals("")) {
mesArea.setText(mesArea.getText().trim());
try {
if (chatArea.getDocument().getText(0, chatArea.getDocument().getLength()).equals("")) {
chatArea.setText("<html><font color='green'>"+user.getNickname()+": </font>"+mesArea.getText()+"</html>");
} else {
System.out.println("what");
String paneText = new String(chatArea.getDocument().getText(0, chatArea.getDocument().getLength()));
chatArea.setText("<html>"+paneText+"\n<font color='green'>"+user.getNickname()+": </font>"+mesArea.getText()+"</html>");
}
} catch (Exception ex) {
ex.printStackTrace();
}
mesArea.setText("");
} else {
mesArea.setText("");
}
回答by Vishnu Katpure
You can use JTextPane / JEditorPaneinstead of JTextArea
like
您可以使用JTextPane / JEditorPane代替 JTextArea 之类的
String text = new String("Hello");
String htmlText = new String("<html><font color='red'>" + text + "</font></html>");
JTextPane jTextPane =new JTextPane ();
jTextPane.setContentType("text/html");
jTextPane.setText(htmlText);
