How to execute a batch file from java?

Question

I want to execute a batch file from a java program.

I am using the following command.

Runtime.getRuntime().exec("server.bat");

But the problem is I want to give a reative path instead of absolute path so that I can deploy that java project on any comp.

The dir structure of the project is like as follows:

com
   |
  project
   |
   ------ parser
   |         |_____ Main.java
   |
   -------util
             |_____ Server.bat

I want to run the "Server.bat" file in the "util" dir from the "Main.java" file in the "parser" dir.

Answer 1

When Java is running and you use Runtime.exec() with a relative path, relative means relative to the current user direcory, where the JVM was invoked.

This may work

Runtime.getRuntime().exec("cmd.exe", "/c", "./com/projct/util/server.bat");

if you start java from com's parent directory.

Or you must calculate an absolut path:

Runtime.getRuntime().exec("cmd.exe", "/c", 
System.getProperty("user.dir")+"/com/projct/util/server.bat");

I forget, read When Runtime.exec() won't.