Question

I’m writing my Java app a update mechnism.
I create a windows batch file,exit my program and the batch file continues to delete my Jar, copy the new one from a remote location, start the jar.
My problem: deletion + copy works, BUT – the application won’t start.
I think the problem is that I don’t know how to make Java to execute batch file in separate process tree.
when running this:
Runtime.getRuntime()
I open a child process.

So my question – How can Java execute batch file in separate process tree?

Answer 1

Here is a workaround that uses cmd as the interminent layer:

public class Main {
    public static void main(String[] args) throws Exception {
        Process p = Runtime.getRuntime().exec("cmd /c c:\\test.bat");
    }
}

where test.bat will contain

@echo off
PING 1.1.1.1 -n 1 -w 5000 >nul
java -jar "[path]"