public class MiniBrowser
1: // MiniBrowser.java
2: // Retrieves a file from a web server as raw text.
4: import java.awt.*;
5: import java.awt.event.*;
6: import java.net.*;
7: import java.io.*;
9: public class MiniBrowser
10: extends Frame
11: implements ActionListener
12: {
13: private TextField txtInput;
14: private TextArea contents;
15: private Button btnDisplay;
16: private Button exit;
18: public static void main(String [] args)
19: {
20: MiniBrowser m = new MiniBrowser();
21: m.makeGUI();
22: m.setSize(550, 400);
23: m.setVisible(true);
24: }
26: public void makeGUI()
27: {
28: setLayout(new FlowLayout());
30: txtInput = new TextField(50);
31: add(txtInput);
32: btnDisplay = new Button("Display page at this URL");
33: add(btnDisplay);
35: exit = new Button("Exit");
36: add(exit);
37: exit.addActionListener(this);
39: contents =
40: new TextArea("", 20, 60, TextArea.SCROLLBARS_VERTICAL_ONLY);
41: add(contents);
42: btnDisplay.addActionListener(this);
43: }
45: public void actionPerformed(ActionEvent event)
46: {
47: if (event.getSource() == exit)
48: System.exit(0);
50: String line;
51: String location = txtInput.getText();
53: try
54: {
55: URL url = new URL(location);
56: BufferedReader input = new
57: BufferedReader(new InputStreamReader(url.openStream()));
58: while ((line = input.readLine()) != null)
59: {
60: contents.append(line);
61: contents.append("/n");
62: }
63: input.close();
64: }
65: catch (MalformedURLException e)
66: {
67: contents.setText("Invalid URL Format");
68: }
69: catch (IOException io)
70: {
71: contents.setText(io.toString());
72: }
73: }
74: }