swing 创建一个DefaultStyledDocument
示例
try {
StyledDocument doc = new DefaultStyledDocument();
doc.insertString(0, "This is the beginning text", null);
doc.insertString(doc.getLength(), "\nInserting new line at end of doc", null);
MutableAttributeSet attrs = new SimpleAttributeSet();
StyleConstants.setBold(attrs, true);
doc.insertString(5, "This is bold text after 'this'", attrs);
} catch (BadLocationException ex) {
//处理错误
}DefaultStyledDocuments可能是您使用最多的资源。可以直接创建它们，并StyledDocument抽象类的子类。