Use the Java Socket object and the BufferedReader to retrieve the response of an HTTP web request.
1. import java.awt.BorderLayout;
2. import java.awt.GridBagConstraints;
3. import java.awt.GridBagLayout;
4. import java.io.BufferedReader;
5. import java.io.IOException;
6. import java.io.InputStreamReader;
7. import java.io.PrintWriter;
8. import java.net.Socket;
9.
10. import javax.swing.JButton;
11. import javax.swing.JFrame;
12. import javax.swing.JPanel;
13. import javax.swing.JTextArea;
14. import javax.swing.JTextField;
15. import javax.swing.JToolBar;
16.
17. public class Browser extends JFrame {
18.
19. private static final long serialVersionUID = 1L;
20.
21. private JPanel jContentPane = null;
22.
23. private JPanel jPanel = null;
24.
25. private JToolBar jToolBar = null;
26.
27. private JTextField jTextField = null;
28.
29. private JButton goButton = null;
30.
31. private JTextArea jTextArea = null;
32.
33. private Socket webSocket; // @jve:decl-index=0:
34. private BufferedReader buffIn;
35. private PrintWriter printOut;
36.
37. /**
38. * This is the default constructor
39. */
40. public Browser() {
41. super();
42. initialize();
43. }
44.
45. /**
46. * This method initializes this
47. *
48. * @return void
49. */
50. private void initialize() {
51. this.setSize(300, 200);
52. this.setContentPane(getJContentPane());
53. this.setTitle("Browser");
54. }
55.
56. /**
57. * This method initializes jContentPane
58. *
59. * @return javax.swing.JPanel
60. */
61. private JPanel getJContentPane() {
62. if (jContentPane == null) {
63. jContentPane = new JPanel();
64. jContentPane.setLayout(new BorderLayout());
65. jContentPane.add(getJPanel(), BorderLayout.CENTER);
66. jContentPane.add(getJToolBar(), BorderLayout.NORTH);
67. }
68. return jContentPane;
69. }
70.
71. /**
72. * This method initializes jPanel
73. *
74. * @return javax.swing.JPanel
75. */
76. private JPanel getJPanel() {
77. if (jPanel == null) {
78. GridBagConstraints gridBagConstraints = new GridBagConstraints();
79. gridBagConstraints.fill = GridBagConstraints.BOTH;
80. gridBagConstraints.gridy = 0;
81. gridBagConstraints.weightx = 1.0;
82. gridBagConstraints.weighty = 1.0;
83. gridBagConstraints.gridx = 0;
84. jPanel = new JPanel();
85. jPanel.setLayout(new GridBagLayout());
86. jPanel.add(getJTextArea(), gridBagConstraints);
87. }
88. return jPanel;
89. }
90.
91. /**
92. * This method initializes jToolBar
93. *
94. * @return javax.swing.JToolBar
95. */
96. private JToolBar getJToolBar() {
97. if (jToolBar == null) {
98. jToolBar = new JToolBar();
99. jToolBar.add(getJTextField());
100. jToolBar.add(getGoButton());
101. }
102. return jToolBar;
103. }
104.
105. /**
106. * This method initializes jTextField
107. *
108. * @return javax.swing.JTextField
109. */
110. private JTextField getJTextField() {
111. if (jTextField == null) {
112. jTextField = new JTextField();
113. jTextField.setText("www.geekpedia.com");
114. }
115. return jTextField;
116. }
117.
118. /**
119. * This method initializes goButton
120. *
121. * @return javax.swing.JButton
122. */
123. private JButton getGoButton() {
124. if (goButton == null) {
125. goButton = new JButton();
126. goButton.setText("Go");
127. goButton.addMouseListener(new java.awt.event.MouseAdapter() {
128. public void mouseReleased(java.awt.event.MouseEvent e) {
129. openConnection();
130. }
131. });
132. }
133. return goButton;
134. }
135.
136. private void openConnection()
137. {
138. try
139. {
140. jTextArea.setText(""); // Clear the text area
141. webSocket = new Socket(jTextField.getText(), 80);
142.
143. buffIn = new BufferedReader(new InputStreamReader(webSocket.getInputStream()));
144. printOut = new PrintWriter(webSocket.getOutputStream(), true);
145. printOut.println("GET index.html");
146. printOut.flush();
147. String currLine;
148. while((currLine = buffIn.readLine()) != null)
149. {
150. jTextArea.setText(jTextArea.getText() + currLine);
151. }
152. printOut.close();
153. buffIn.close();
154. webSocket.close();
155. }
156. catch(IOException e)
157. {
158. e.printStackTrace();
159. }
160. }
161.
162. /**
163. * This method initializes jTextArea
164. *
165. * @return javax.swing.JTextArea
166. */
167. private JTextArea getJTextArea() {
168. if (jTextArea == null) {
169. jTextArea = new JTextArea();
170. jTextArea.setLineWrap(true);
171. }
172. return jTextArea;
173. }
174.
175. }
