Can Java Applications Run Separately Based on Their Names?

Invoking Java Applications in Independent Processes

Question:

Can Java applications be executed in separate processes based on their names, independent of their location?

Answer:

Yes, it is possible to execute Java applications in separate processes using their names, rather than their file paths. This can be achieved in a platform-independent manner by leveraging Java system properties.

To run a Java application in a separate process, you can use the following approach:

<code class="java">public class JavaProcess {

    public static int execute(Class<?> appClass, List<String> args) throws IOException, InterruptedException {
        String javaHome = System.getProperty("java.home");
        String javaBin = javaHome + File.separator + "bin" + File.separator + "java";
        String classpath = System.getProperty("java.class.path");
        String className = appClass.getName();

        List<String> command = new LinkedList<>();
        command.add(javaBin);
        command.add("-cp");
        command.add(classpath);
        command.add(className);
        if (args != null) {
            command.addAll(args);
        }

        ProcessBuilder builder = new ProcessBuilder(command);
        Process process = builder.inheritIO().start();
        process.waitFor();
        return process.exitValue();
    }
}</code>

Usage:

<code class="java">int exitCode = JavaProcess.execute(MyApplicationClass.class, arguments);</code>

This approach seamlessly integrates with the classpath mechanism, allowing for easy execution of applications regardless of their physical location.

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