如何打开一个HTML文件

Question

在JAVA语言中，有什么语句可以直接执行，打开一个index.html文件
比如说在
button1.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
  //打开一个a.html文件，我怎么写  }
});

Answer 1

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
   
public class JEditorPaneExample extends JFrame implements
    HyperlinkListener
{
    public static void main(String[] argv)
    {
        JEditorPaneExample mainApp = new JEditorPaneExample();
    }
    
    public JEditorPaneExample()
    {
        super("JEditorPaneExample Example");
        setBounds(0, 0, 600, 400);
        getContentPane().setLayout(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
               
        // Attempt to load an 'index' html page...
        try
        {
            URL url = null;
        
           try
            {
                url = getClass().getResource("index.html");
            }
            catch(Exception e)
            {
                System.out.println("Could not open file!");
                url = null;
            }
            
            if(url != null)
            {
                htmlViewer = new JEditorPane(url);
                htmlViewer.setEditable(false);
                htmlViewer.addHyperlinkListener(this);
            
                scrollpane = new JScrollPane();
                scrollpane.setBounds(10, 10, 570, 350);
                scrollpane.getViewport().add(htmlViewer);
            }
         }
         catch(MalformedURLException e)
         {
             System.out.println(e);
         }
         catch(IOException e)
         {
             System.out.println(e);
         }
         
        getContentPane().add(scrollpane);
        
        setVisible(true);
    }
    
    public void hyperlinkUpdate(HyperlinkEvent e)
    {
        if(e.getEventType() == HyperlinkEvent.EventType.ACTIVATED)
        {
            if(e instanceof HTMLFrameHyperlinkEvent)
            {
                ((HTMLDocument) htmlViewer.getDocument()).processHTML
                    FrameHyperlinkEvent((HTMLFrameHyperlinkEvent) e);
            }
            else
            {
                try
                {
                    htmlViewer.setPage(e.getURL());
                }
                catch(IOException e2)
                {
                    System.out.println(e2);
                }
            }
        }
    }
       
    JEditorPane htmlViewer;
    JScrollPane scrollpane;
}