how to give wait & close the command prompt in java

Question

I am using the following code to execute a batch file:

java.lang.Runtime rt = java.lang.Runtime.getRuntime();
Process pr = rt.exec("MyBatch.bat");

My batch file takes some time to execute. I want my servlet process to wait till the batch file execution completes. I would like to close the command prompt after executing the batch file. How can I do this?

Answer 1

Use Process.waitFor() to have your thread wait for the completion of the batch file's execution.

java.lang.Runtime rt = java.lang.Runtime.getRuntime();
Process pr = rt.exec("MyBatch.bat");
pr.waitFor();

You may also want to look at using ProcessBuilder instead of Runtime.getRuntime().exec() if you need access to the console's output and/or input.