Java - 无法加载相同的 url 并将其显示在编辑器 Pane 中两次？

Question

这是我用来在编辑器 Pane 中显示 url 内容的代码




 import javax.swing.*;
 import java.awt.event.*;
 import java.awt.*;
 import java.io.*;
 import java.net.*;


 public class header extends JFrame {

 private void initComponents() {

 jTextField2 = new JTextField();
 jTextField3 = new JTextField();
 jButton1 = new JButton();
 jScrollPane1 = new JScrollPane();
 jTextArea1 = new JEditorPane();

 setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

 jButton1.setText("Load");
 jButton1.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent evt) {
 jButton1ActionPerformed(evt);
 }
 });

 jTextArea1.setEditable(false);
 jScrollPane1.setViewportView(jTextArea1);
 setSize(418,300);
 setVisible(true);
 GroupLayout layout = new GroupLayout(getContentPane());
 getContentPane().setLayout(layout);
 layout.setHorizontalGroup(
 layout.createParallelGroup(GroupLayout.Alignment.LEADING)
 .addGroup(GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
 .addContainerGap()
 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.TRAILING)
 .addComponent(jScrollPane1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 394, Short.MAX_VALUE)
 .addGroup(layout.createSequentialGroup()
 .addComponent(jTextField2, GroupLayout.PREFERRED_SIZE, 277, GroupLayout.PREFERRED_SIZE)
 .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
 .addComponent(jTextField3, GroupLayout.PREFERRED_SIZE, 32, GroupLayout.PREFERRED_SIZE)
 .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
 .addComponent(jButton1, GroupLayout.DEFAULT_SIZE, 71, Short.MAX_VALUE)))
 .addContainerGap())
 );
 layout.setVerticalGroup(
 layout.createParallelGroup(GroupLayout.Alignment.LEADING)
 .addGroup(layout.createSequentialGroup()
 .addContainerGap()
 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
 .addComponent(jTextField2, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
 .addComponent(jTextField3, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
 .addComponent(jButton1))
 .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
 .addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 242, Short.MAX_VALUE)
 .addContainerGap())
 );

 pack();
 }// </editor-fold>

 private void jButton1ActionPerformed(ActionEvent evt) {
 try {
 URL header = new URL(jTextField2.getText());
 jTextArea1.setPage(header);
 }catch(MalformedURLException e){} catch(IOException e){}
 }


 /**
 * @param args the command line arguments
 */
 public static void main(String args[]) {
 header gui = new header();
 gui.initComponents();
 }
 // Variables declaration - do not modify
 private JButton jButton1;
 private JScrollPane jScrollPane1;
 private JEditorPane jTextArea1;
 private JTextField jTextField2;
 private JTextField jTextField3;
 // End of variables declaration
 }

我只是无法让它刷新并显示相同 url 的内容两次。当我点击加载按钮时它会加载内容，但如果我再次点击加载按钮，它不会加载 url 或显示内容..我做错了什么？我对java很陌生，如果它是一个简单的解决方案，那么抱歉，如果您能指出我解决这个问题的正确方向，那就太好了，谢谢!

Answer 1

我依稀记得你需要强制编辑器面板重新加载页面。

只是猜测，但您可以尝试:

setContentType("");

或者

setDocument(null);