Determine if a java execution from another java application was done successfully

I have an application that calls a java test class in a specified location of my PC. The path is hard-coded for now, and I checked that it worked by executing it from the command line (in case you want to see it: java -cp C:\Users\user\Documents\workspace\test\build\test.jar org.junit.runner.JUnitCore us.test.DynamicWebserviceInvocationTest), so I know that the command works fine.

The thing is, when I do Runtime.getRuntime().exec(command), if I try to log the resulting InputStream and ErrorStream of its resulting process, the program stucks. I tried with exitValue() and waitFor(), but the first throws an incompletition error and the second also gets stuck. The weird thing is that if I don't touch anything of this (the streams, or using the functions), the program has no problem ending.

So my question is: Why could this be? The next step is to build the command with given parameters, but if I can't see the resulting inputs I can't be completely sure if the tests are running or not.

The code, in case you want to see it:

Runtime runtime=Runtime.getRuntime(); logger.debug("Attempting to execute the test {} at path {}",classpath,applicationLocation);

        String command="java -cp C:\\Users\\user\\Documents\\workspace\\test\\build\\test.jar org.junit.runner.JUnitCore us.test.DynamicWebserviceInvocationTest";
        Process process=runtime.exec(command);
        BufferedReader stdInput = new BufferedReader(new 
                 InputStreamReader(process.getInputStream()));

        BufferedReader stdError = new BufferedReader(new 
             InputStreamReader(process.getErrorStream()));

        // read the output from the command
        System.out.println("Here is the standard output of the command:\n");
        String s = null;
        while ((s = stdInput.readLine()) != null) {
            System.out.println(s);
        }

        // read any errors from the attempted command
        System.out.println("Here is the standard error of the command (if any):\n");
        while ((s = stdError.readLine()) != null) {
            System.out.println(s);
        }