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  1. import java.awt.*;
  2. import java.awt.event.*;
  3. import java.util.*;
  4. import java.net.*;
  5. import java.io.*;
  6. import javax.swing.*;
  7. import javax.swing.event.*;
  8.  
  9. public class WebBrowser
  10. {
  11.      public static void main(String [] args)
  12.      {
  13.           JFrame frame = new EditorPaneFrame();
  14.           frame.show();
  15.      }
  16. }
  17. class EditorPaneFrame extends JFrame
  18. {
  19.  
  20.      private JTextField url;
  21.      private JCheckBox editable;
  22.      private JButton loadButton;
  23.      private JButton backButton;
  24.      private JEditorPane editorPane;
  25.      private Stack urlStack = new Stack();
  26.  
  27.  
  28.      public EditorPaneFrame()
  29.      {
  30.           setTitle("Java Web Browser");
  31.           setSize(600,400);
  32.           addWindowListener(new WindowAdapter()
  33.           {
  34.                public void windowClosing(WindowEvent e)
  35.                {
  36.                     System.exit(0);
  37.                }
  38.           } );
  39.  
  40.           // set up text field and load button for typing in URL
  41.  
  42.           url = new JTextField(30);
  43.  
  44.           loadButton = new JButton("Load");
  45.           loadButton.addActionListener(new ActionListener()
  46.           {
  47.                public void actionPerformed(ActionEvent event)
  48.                {
  49.                     try
  50.                     {
  51.                          // remember URL for back button
  52.                          urlStack.push(url.getText());
  53.                          editorPane.setPage(url.getText());
  54.                     }
  55.                     catch(Exception e)
  56.                     {
  57.                          editorPane.setText("Error: " +e);
  58.                     }
  59.                }
  60.           });
  61.  
  62.           // set up back button and button action
  63.  
  64.           backButton = new JButton("Back");
  65.           backButton.addActionListener(new ActionListener()
  66.           {
  67.                public void actionPerformed(ActionEvent event)
  68.                {
  69.                     if(urlStack.size()<=1) return;
  70.                     try
  71.                     {
  72.                          urlStack.pop();
  73.                          String urlString = (String)urlStack.peek();
  74.                          url.setText(urlString);
  75.                          editorPane.setPage(urlString);
  76.                     }
  77.                     catch(IOException e)
  78.                     {
  79.                          editorPane.setText("Error : " +e);
  80.                     }
  81.                }
  82.           });
  83.  
  84.           editorPane = new JEditorPane();
  85.           editorPane.setEditable(false);
  86.           editorPane.addHyperlinkListener(new HyperlinkListener()
  87.           {
  88.                public void hyperlinkUpdate(HyperlinkEvent event)
  89.                {
  90.                     if(event.getEventType() ==
  91. HyperlinkEvent.EventType.ACTIVATED)
  92.                     {
  93.                          try
  94.                          {
  95.                               urlStack.push(event.getURL().toString());
  96.                               url.setText(event.getURL().toString());
  97.  
  98.                               editorPane.setPage(event.getURL());
  99.                          }
  100.                          catch(IOException e)
  101.                          {
  102.                               editorPane.setText("Error: " + e);
  103.                          }
  104.                     }
  105.                }
  106.           });
  107.  
  108.           editable = new JCheckBox();
  109.           editable.addActionListener(new ActionListener()
  110.           {
  111.                public void actionPerformed(ActionEvent event)
  112.                {
  113.                     editorPane.setEditable(editable.isSelected());
  114.                }
  115.           });
  116.  
  117.           Container contentPane = getContentPane();
  118.           contentPane.add(new JScrollPane(editorPane), "Center");
  119.  
  120.           JPanel panel = new JPanel();
  121.           panel.add(new JLabel("URL"));
  122.           panel.add(url);
  123.           panel.add(loadButton);
  124.           panel.add(backButton);
  125.           panel.add(new JLabel("Editable"));
  126.           panel.add(editable);
  127.  
  128.           contentPane.add(panel,"South");
  129.      }
  130.  
  131. }
Runtime error #stdin #stdout 0.02s 4980KB
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https://ideone.com/ssMe4
language:
JavaScript (SMonkey 60.2.3)
created:
14 years ago
visibility:
public

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