How to Restart a Java AWT Application like C# Application.Restart()?

Restarting a Java Application

Question:

How can I restart a Java AWT application initiated by an event handler attached to a button, replicating the functionality of Application.Restart() in C#?

Answer:

Yes, it is possible to restart a Java application. Here's a solution:

public void restartApplication() {
    String javaBin = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
    File currentJar = new File(MyClassInTheJar.class.getProtectionDomain().getCodeSource().getLocation().toURI());

    // Check if it's a jar file
    if (!currentJar.getName().endsWith(".jar")) {
        return;
    }

    // Build command: java -jar application.jar
    ArrayList<String> command = new ArrayList<>();
    command.add(javaBin);
    command.add("-jar");
    command.add(currentJar.getPath());

    ProcessBuilder builder = new ProcessBuilder(command);
    builder.start();
    System.exit(0);
}

This method operates as follows:

1. Locate Java Executable: It retrieves the java executable (in this case, java binary).
2. Identify Application: It identifies the application, assumed to be a jar file in this example, using the provided class.
3. Construct Restart Command: It assembles a command to restart the jar using the java binary.
4. Execute Command: The command is executed, terminating the current application and starting it again.

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