How to wait and close the command prompt in Java

I use the following code to execute the 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 until the batch file is executed I want to close the command prompt after executing the batch file How can I do this?

Solution

Using process Waitfor() lets your thread wait for the execution of the batch file to complete

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

If you need to access the output and / or input of the console, you may also want to see using process builder instead of runtime getRuntime(). exec().