Executing Batch file from java and open the cmd of running batch file

Batch files alone can't be executed. They need an application to run them. In your case, that application is cmd.exe. Windows Explorer takes care of this when you run a batch by clicking on it. Java doesn't have this luxury.

Runtime.getRuntime().exec("cmd /c start HelloWorld.bat"); // *

Another similar command that anyone reading this would be familiar with is:

java HelloWorld.java

Notice how you had to specify which application you wanted to use to run this file? Typing the file name, HelloWorld.java, all by itself would not accomplish much.

_{*The /c switch puts the output in a new window which terminates when the batch file has completed.}

Try adding a waitFor() to your code.

Process p = Runtime.getRuntime().exec("cmd /C e:/Users/Bryan/touchafile.bat");
p.waitFor();

Also you might find looking at the output of the process useful.

InputStream error = p.getErrorStream();
InputStream output = p.getInputStream();
System.out.println(IOUtils.toString(error));
System.out.println(IOUtils.toString(output));