another simple client loader with progress bar and simple ui
wrote this couple years ago and seen some help topic, might come in use to others
Code:
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
public final class Loader extends JFrame {
private static final long serialVersionUID = 1L;
private static final String CLIENT_URL = "http://www.SERVER_NAME.extension/client.jar";
private static final String CLIENT_DIRECTORY = System.getProperty("user.home") + "/.SERVER_NAME/";
private JLabel status;
private JProgressBar progressBar;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
final Loader frame = new Loader();
frame.setVisible(true);
double version = Double.parseDouble(System.getProperty("java.version").substring(0, 3));
if(version < 1.6) {
JOptionPane.showMessageDialog(null, "Please update your Java at www.java.com/download/.");
return;
}
SwingWorker<Void, Void> worker = new SwingWorker<Void, Void>() {
@Override
protected Void doInBackground() throws Exception {
File dir = new File(CLIENT_DIRECTORY);
if (!dir.exists() && !dir.mkdir()) {
throw new Exception("Unable to create directory " + CLIENT_DIRECTORY);
}
URL url = new URL(CLIENT_URL);
URLConnection conn = url.openConnection();
conn.setRequestProperty("User-Agent", "SERVER_NAME, Loader 1.00");
int fileSize = conn.getContentLength();
File existingClient = new File(CLIENT_DIRECTORY + "client.jar");
if (existingClient.exists() && existingClient.length() == fileSize) {
return null;
}
InputStream in = null;
OutputStream out = null;
try {
in = new BufferedInputStream(url.openStream());
out = new FileOutputStream(CLIENT_DIRECTORY + "client.jar");
byte data[] = new byte[1024];
long total = 0;
int count = 0;
while ((count = in.read(data)) != -1) {
out.write(data, 0, count);
total += count;
setProgress((int) ((total * 100) / fileSize));
}
} catch (IOException e) {
frame.status.setText("Error loading client...");
JOptionPane.showMessageDialog(null, e.getMessage());
} finally {
if(in != null) {
in.close();
}
if(out != null) {
out.close();
}
}
return null;
}
@Override
protected void done() {
frame.status.setText("Starting client please wait...");
try {
ProcessBuilder pb = new ProcessBuilder(new String[] { "java", "-Xmx768m", "-Xss2m", "-Dsun.java2d.noddraw=true", "-XX:CompileThreshold=1500", "-Xincgc", "-XX:+UseConcMarkSweepGC", "-XX:+UseParNewGC", "-jar", "client.jar"});
// osx fix
if(System.getProperty("os.name").equalsIgnoreCase("mac os x")) {
pb = new ProcessBuilder(new String[] { "/usr/libexec/java_home", "-v", "1.6.*", "--exec", "java", "-Xmx768m", "-Xss2m", "-Dsun.java2d.noddraw=true", "-XX:CompileThreshold=1500", "-Xincgc", "-XX:+UseConcMarkSweepGC", "-XX:+UseParNewGC", "-jar", "client.jar"});
}
pb.directory(new File(CLIENT_DIRECTORY));
pb.start();
System.exit(-1);
/*System.out.println(url.toString());
URL[] urls = new URL[]{ url };
ClassLoader cl = new URLClassLoader(urls);
Class<?> clientClass = cl.loadClass("b");
Applet loader = (Applet) clientClass.newInstance();
frame.setTitle("SERVER_NAME Client");
frame.setSize(771, 532);
frame.setContentPane(loader);
frame.setLocationRelativeTo(null);
loader.init();*/
} catch (Exception e) {
frame.status.setText("Error loading client...");
JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
};
worker.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent event) {
if (event.getPropertyName().equalsIgnoreCase("progress")) {
int progress = (Integer) event.getNewValue();
frame.progressBar.setValue(progress);
}
}
});
worker.execute();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Loader() {
setTitle("SERVER_NAME Loader 1.02");
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setBounds(100, 100, 295, 97);
setLocationRelativeTo(null);
Toolkit kit = Toolkit.getDefaultToolkit();
Image img = kit.createImage(ClassLoader.getSystemResource("logo.png"));
setIconImage(img);
JPanel contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
setResizable(false);
progressBar = new JProgressBar();
progressBar.setBounds(6, 34, 283, 20);
contentPane.add(progressBar);
status = new JLabel("Getting latest client...");
status.setHorizontalAlignment(SwingConstants.CENTER);
status.setBounds(6, 6, 283, 16);
contentPane.add(status);
}
}
