Java to batch file

Question

Can any body help me in knowing how to pass a parameter from a Java program to a Batch file which is also used in the same java program.

The following stub indicates the piece of code where I run the batch file

Runtime rt = Runtime.getRuntime();
rt.exec("C:/test.bat");

I need to know if I could pass some parameters to test.bat which is used in the above snippet.

Answer 1

Why can't you insert the parameters into the exec() call?

 rt.exec("C:/test.bat <param 1>...");

I think the syntax to get at the parameters in the bat file is:

%1 for first param    
%2 for second...

Answer 2

you can use a string array as the arg to Runtime.getRuntime().exec(). see the JavaDoc

 public Process exec(String[] cmdarray) throws IOException

Answer 3

I am pretty sure you just stick it on the end the string, same as if you were to run it on a command line:

rt.exec("C:/test.bat "+someparm+" "+anotherparm);

Answer 4

This should work:

String[] cmd = { "C:/test.bat", "param1", "param2" }
Runtime rt = Runtime.getRuntime();
rt.exec(cmd);