Java高亮显示被选中文本:StyledDocument.setCharacterAttributes()

Java高亮显示被选中文本:StyledDocument.setCharacterAttributes() 复用代码 javax.swing.text.JTextComponent。requestFocus(); javax.swing.text.JTextComponent。select(start, end); 不获得焦点，文本被选中但不会高亮。 ----------------------- hxzon：上面的方式转移了焦点，更好的方式如下： JTextPane hexPane; SimpleAttributeSet notSelected; SimpleAttributeSet selected; StyledDocument doc; //设置样式 notSelected = new SimpleAttributeSet();         selected = new SimpleAttributeSet(notSelected);         StyleConstants.setForeground(selected, new DefaultTreeCellRenderer().getTextSelectionColor());         StyleConstants.setBackground(selected, new DefaultTreeCellRenderer().getBackgroundSelectionColor()); //文本内容 hexPane.setText(packet.messageToHex()); //高亮显示被选中文本 goosetree.addTreeSelectionListener(new TreeSelectionListener() {    public void valueChanged(TreeSelectionEvent e) {     TreePath treePath = e.getPath();     if (treePath == null) {      return;     }     DefaultMutableTreeNode node = (DefaultMutableTreeNode) treePath       .getLastPathComponent();     int offset = 0;                 int len = 0;     if (node.getUserObject() instanceof PropertyNode) {      PropertyNode leaf = (PropertyNode) node.getUserObject();      offset = leaf.offset;      len = leaf.len;     }     else if (node.getUserObject() instanceof GooseNode) {                     GooseNode leaf = (GooseNode) node.getUserObject();                     offset = leaf.offset;                     len = leaf.len;                 }     else if (node.getUserObject() instanceof DatasetNode) {                     DatasetNode leaf = (DatasetNode) node.getUserObject();                     offset = leaf.offset;                     len = leaf.len;                 }                 int end = offset + len;                 offset = offset * 2 + offset;                 end = end * 2 + end;                 offset += offset / 48;                 end += end / 48 - 1; //                hexPane.requestFocus();                 doc=hexPane.getStyledDocument();                 doc.setCharacterAttributes(0, doc.getLength(), notSelected, true);                 doc.setCharacterAttributes(offset, end - offset, selected, true);                 hexPane.select(offset, end);//加上此句，当选中文本不可见时滚动条自动滚动    } });