如何在JTextPane中删除第一行并设置setContentType（“ text / html”）
[英]How to remove first line in JTextPane and setting setContentType(“text/html”)
问题描述
I want to remove the first line in JTextPane and setting setContentType("text/html"); 
我想删除JTextPane中的第一行并设置setContentType（“ text / html”）; to be able to use html tags in JTextPane. 才能在JTextPane中使用html标签。
When I use this code 当我使用此代码
setContentType("text/html"); setContentType（“ text / html”）;
try {
Element root = getDocument().getDefaultRootElement();
Element firstLine = root.getElement(0);
getDocument().remove(firstLine.getStartOffset(), firstLine.getEndOffset());
}
catch (Exception e) {e.toString();}
I get an exception 我有一个例外
javax.swing.text.BadLocationException: Invalid remove
if I commented setContentType("text/html"); 如果我评论了setContentType（“ text / html”）; I can be able to remove the first line from JTextPane. 我可以从JTextPane删除第一行。
1 个解决方案
解决方案1
1 2015-02-24 12:33:02
For the HTMLEditorKit the Element firstLine = root.getElement(0); 对于HTMLEditorKit， Element firstLine = root.getElement(0); normally returns <HEAD> but you need <BODY> . 通常返回<HEAD>但您需要<BODY> 。 Go through the Element Tree, find the BODY and remove the first child of BODY. 遍历元素树，找到BODY并删除BODY的第一个子代。
UPDATE: The link shows a tool you can use to understand your Document structure. 更新：链接显示了可用于了解文档结构的工具。 http://java-sl.com/JEditorPaneStructureTool.html http://java-sl.com/JEditorPaneStructureTool.html
You can check which elements you have and figure out which exactly element should be removed. 您可以检查拥有的元素，并确定应该删除的元素。
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