public class GetRemoteTime
1: // GetRemoteTime.java
2: // Retrieves the time from a "remote" server.
4: import java.awt.*;
5: import java.awt.*;
6: import java.awt.event.*;
7: import java.net.*;
8: import java.io.*;
10: public class GetRemoteTime
11: extends Frame
12: implements ActionListener
13: {
14: private TextField hostInput;
15: private TextArea display;
16: private Button button;
17: private Button exit;
19: public static void main(String [] args)
20: {
21: GetRemoteTime gr = new GetRemoteTime();
22: gr.makeGUI();
23: gr.setSize(550, 300);
24: gr.setVisible(true);
25: }
27: public void makeGUI()
28: {
29: setLayout(new FlowLayout());
31: hostInput = new TextField(50);
32: add(hostInput);
33: button = new Button("Get time from this host");
34: add(button);
35: display = new
36: TextArea("", 0, 0, TextArea.SCROLLBARS_VERTICAL_ONLY);
37: add(display);
38: button.addActionListener(this);
40: exit = new Button("Exit");
41: add(exit);
42: exit.addActionListener(this);
43: }
45: public void actionPerformed(ActionEvent event)
46: {
47: if (event.getSource() == exit)
48: System.exit(0);
50: String theTime;
51: String host = hostInput.getText();
53: try
54: {
55: Socket socket = new Socket(host, 7013);
56: //Socket socket = new Socket(host, 13);
57: BufferedReader input = new
58: BufferedReader(new
59: InputStreamReader(socket.getInputStream()));
60: theTime = input.readLine();
61: display.append("The time at " + host +
62: " is " + theTime + ". ");
64: socket.close();
65: }
66: catch (UnknownHostException e)
67: {
68: display.setText("No such host. ");
69: }
70: catch (IOException io)
71: {
72: display.setText(io.toString());
73: }
74: }
75: }