我正在尝试使用 JEditorPane 来显示一些 HTML 文本。出于某种原因,我必须使用 setText() 方法。但是,这会使 JEditorPane 闪烁。原因是每次更新editorPane.setText(msgBuffer);之后 我必须将光标移到文档editorPane.setCaretPosition((editorPane.getDocument()).getLength()-1)的末尾,因为我希望最近的文本行出现在文档的底部。我为你们提供了整个代码,让你们自己看看。我已经看到了许多关于使用 document.insertString 的建议,但就此而言,我必须使用我不感兴趣的单个属性。有什么办法可以让这段代码无闪烁运行吗?
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.text.Document;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;
public class CMessageWindow {
private static final String ERROR = "ERROR";
private static final String MESSAGE = "msg";
private JScrollPane scrollPane;
public JEditorPane editorPane;
private HTMLEditorKit kit;
private String msgBuffer=new String("");
private static CMessageWindow window=null;
private static JFrame frameContainer=null;
private CMessageWindow()
{
editorPane = new JEditorPane ();
editorPane.setEditable(false);
editorPane.setContentType("text/html");
kit = new HTMLEditorKit();
editorPane.setEditorKit(kit);
StyleSheet styleSheet = kit.getStyleSheet();
styleSheet.addRule("."+MESSAGE+" {font: 10px monaco; color: black; }");
styleSheet.addRule("."+ERROR+" {font: 10px monaco; color: #ff2222; background-color : #cccccc; }");
Document doc = kit.createDefaultDocument();
editorPane.setDocument(doc);
scrollPane = new JScrollPane(editorPane);
}
public static CMessageWindow getInstance(){
if (null==window)
{window=new CMessageWindow();}
return window;
}
/**
* The core
* @param sMessage
* @param sType
*/
private void updateMessages(final String sMessage, final String sType)
{
String sMessageHTML="";
String sTypeText="";
if (!sMessage.equals("\r\n")){
sTypeText = sType+": ";
}
sMessageHTML = sMessage.replaceAll("(\r\n|\n)", "<br/>");
if (!sMessageHTML.equals("<br/>"))
{
sMessageHTML = "<SPAN CLASS="+sType+">"+ sTypeText+sMessageHTML + "</SPAN>";
}
msgBuffer=msgBuffer.concat( sMessageHTML);
editorPane.setText(msgBuffer);
if ((editorPane.getDocument()).getLength()>1){
editorPane.setCaretPosition((editorPane.getDocument()).getLength()-1);
}
}
public void setContainerFrame(JFrame jFrame){
frameContainer = jFrame;
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(frameContainer.getContentPane());
frameContainer.getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(scrollPane)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(scrollPane, javax.swing.GroupLayout.DEFAULT_SIZE, 217, Short.MAX_VALUE))
);
}
public void setVisible(boolean bVisible){
editorPane.setVisible(bVisible);
scrollPane.setVisible(bVisible);
}
public void printMsg(String sMessage){
String sType = MESSAGE;
updateMessages(sMessage,sType);
}
public void printlnMsg(String sMessage){
sMessage=sMessage.concat("\r\n");
printMsg(sMessage);
}
public void printErr(String sMessage){
String sType = ERROR;
updateMessages(sMessage,sType);
}
public void printlnErr(String sMessage){
sMessage=sMessage.concat("\r\n");
printErr(sMessage);
}
public static void main(String args[]){
CMessageWindow m_LogMgr;
JFrame frame = new JFrame();
m_LogMgr=CMessageWindow.getInstance();
m_LogMgr.setContainerFrame(frame);
frame.setVisible(true);
frame.setSize(500, 500);
for(int i=0;i<20;++i){
m_LogMgr.printlnErr("MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM");
}
for(int i=0;i<150;++i){
try {
Thread.sleep(20);
} catch (Exception e) {
}
m_LogMgr.printlnMsg("-----------------------");
}
}
}