GUI for TestOpenMailRelay, lets you run it multiple times in one JVM Java code example - Click here to copy ->>>
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/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
/** GUI for TestOpenMailRelay, lets you run it multiple times in one JVM
* to avoid startup delay.
*
* Starts each in its own Thread for faster return to ready state.
*
* Uses PipedI/OStreams to capture system.out/err into a window.
*/
public class TestOpenMailRelayGUI extends JFrame {
public static void main(String unused[]) throws IOException {
new TestOpenMailRelayGUI().setVisible(true);
}
/** The one-line textfield for the user to type Host name/IP */
protected JTextField hostTextField;
/** The push button to start a test; a field so can disable/enable it. */
protected JButton goButton;
/** Multi-line text area for results. */
protected JTextArea results;
/** The piped stream for the main class to write into "results" */
protected PrintStream ps;
/** The piped stream to read from "ps" into "results" */
protected BufferedReader iis;
/** This inner class is the action handler both for pressing
* the "Try" button and also for pressing <ENTER> in the text
* field. It gets the IP name/address from the text field
* and passes it to process() in the main class. Run in the
* GUI Dispatch thread to avoid messing the GUI. -- tmurtagh.
*/
ActionListener runner = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
goButton.setEnabled(false);
SwingUtilities.invokeLater(
new Thread() {
public void run() {
String host = hostTextField.getText().trim();
ps.println("Trying " + host);
TestOpenMailRelay.process(host, ps);
goButton.setEnabled(true);
}
});
}
};
/** Construct a GUI and some I/O plumbing to get the output
* of "TestOpenMailRelay" into the "results" textfield.
*/
public TestOpenMailRelayGUI() throws IOException {
super("Tests for Open Mail Relays");
PipedInputStream is;
PipedOutputStream os;
JPanel p;
Container cp = getContentPane();
cp.add(BorderLayout.NORTH, p = new JPanel());
// The entry label and text field.
p.add(new JLabel("Host:"));
p.add(hostTextField = new JTextField(10));
hostTextField.addActionListener(runner);
p.add(goButton = new JButton("Try"));
goButton.addActionListener(runner);
JButton cb;
p.add(cb = new JButton("Clear Log"));
cb.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
results.setText("");
}
});
JButton sb;
p.add(sb = new JButton("Save Log"));
sb.setEnabled(false);
results = new JTextArea(20, 60);
// Add the text area to the main part of the window (CENTER).
// Wrap it in a JScrollPane to make it scroll automatically.
cp.add(BorderLayout.CENTER, new JScrollPane(results));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack(); // end of GUI portion
// Create a pair of Piped Streams.
is = new PipedInputStream();
os = new PipedOutputStream(is);
iis = new BufferedReader(new InputStreamReader(is, "ISO8859_1"));
ps = new PrintStream(os);
// Construct and start a Thread to copy data from "is" to "os".
new Thread() {
public void run() {
try {
String line;
while ((line = iis.readLine()) != null) {
results.append(line);
results.append("\n");
}
} catch(IOException ex) {
JOptionPane.showMessageDialog(null,
"*** Input or Output error ***\n" + ex,
"Error",
JOptionPane.ERROR_MESSAGE);
}
}
}.start();
}
}
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References.
The list of classes which were used on this page you can find below. The
links to Java API contain official SUN documentation about all used classes.
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