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我做了一個拼寫檢查器類的東西。在這段代碼中，當用戶點擊一個鏈接時，出現一個選項列表，當選擇一個選項時，超鏈接中的文本被更新。 我的問題是，當我更新第一個單詞時，它消失了。我正在爲它寫一個示例工作代碼。單詞「鏈接」是可點擊的。當使用kit.insertHTML（）更新時，jTextPane中的第一個字消失（）
import java.awt.ComponentOrientation;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JEditorPane;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.event.HyperlinkEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
public class TextPaneTesting1 extends javax.swing.JFrame {
/**
* Creates new form TextPaneTesting
*/
static HTMLEditorKit kit = new HTMLEditorKit();
static HTMLDocument doc = new HTMLDocument();
static String mainText;
public TextPaneTesting1() throws IOException {
initComponents();
jTextPane1.setEditorKit(kit);
jTextPane1.setDocument(doc);
mainText = "<a href = '#'>Link</a> NotLink <a href = '#'>Link</a> NotLink <a href = '#'>Link</a>.";
jTextPane1.setEditable(false);
jTextPane1.setText(mainText);
jTextPane1.setCaretPosition(0);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTextPane1 = new javax.swing.JTextPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextPane1.setContentType("text/UTF-8"); // NOI18N
jTextPane1.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jTextPane1.addHyperlinkListener(new javax.swing.event.HyperlinkListener() {
public void hyperlinkUpdate(javax.swing.event.HyperlinkEvent evt) {
jTextPane1HyperlinkUpdate(evt);
}
});
jScrollPane1.setViewportView(jTextPane1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
private void jTextPane1HyperlinkUpdate(javax.swing.event.HyperlinkEvent evt) {
if(evt.getEventType() == HyperlinkEvent.EventType.ACTIVATED){
int begin = evt.getSourceElement().getStartOffset();
int end = evt.getSourceElement().getEndOffset();
popup = new JPopupMenu();
JMenuItem listOption = new JMenuItem("Click It");
listOption.setFont(new java.awt.Font("Tahoma", java.awt.Font.PLAIN, 12));
listOption.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
try {
updateText(begin, end);
} catch (IOException ex) {
Logger.getLogger(TextPaneTesting1.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
popup.add(listOption);
popup.show(jTextPane1, jTextPane1.getMousePosition().x, jTextPane1.getMousePosition().y);
}
}
static void updateText(int begin, int end) throws IOException{
try {
doc.remove(begin, end - begin);
String replaced = "<a href = '#'>Replaced</a>";
kit.insertHTML((HTMLDocument) doc, begin, replaced, 0, 0, HTML.Tag.A);
} catch (BadLocationException ex) {
Logger.getLogger(TextPaneTesting1.class.getName()).log(Level.SEVERE, null, ex);
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TextPaneTesting1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TextPaneTesting1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TextPaneTesting1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TextPaneTesting1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
new TextPaneTesting1().setVisible(true);
} catch (IOException ex) {
Logger.getLogger(TextPaneTesting1.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private static javax.swing.JTextPane jTextPane1;
// End of variables declaration
private javax.swing.JPopupMenu popup;
}
我已經嘗試過這種insertBeforStart（）命令的
insertBeforeStart()方法，但我得到的錯誤 異常在線程 「AWT-EventQueue的 - 0」 的java.lang .IllegalStateException：在此函數調用時沒有HTMLEditorKit.Parser 。 –我忘了將'jTextPane1.setDocument（doc）;'改成'doc =（HTMLDocument）jTextPane1.getDocument（）;'。它現在有效。謝謝:) –
沒有解析器，因爲你創建了EditorKit範圍內的文檔。所以它沒有正確初始化。 – StanislavL