Why does my Java code execute the cmd command without responding?

Question

I want to use runtime to execute cmdline. This command is to generate example_jtl.jtl and example_visual (a blank folder and new file in here) by example.jmx. The Java code is without error after running, but there is no new file and folder. What should I do?

try {
    System.out.println("begin cmd");
    Runtime mt = Runtime.getRuntime();
    //mt.exec("cmd \\c ionic -v");
    String cmd = "cmd D:\\Programming\\JMeter\\apache-jmeter-5.5\\bin\\jmeter -n -t D:\\Programming\\JMeter\\apache-jmeter-5.5\\result\\example.jmx -l D:\\Programming\\JMeter\\apache-jmeter-5.5\\result\\example_jtl.jtl -e -o D:\\Programming\\JMeter\\apache-jmeter-5.5\\result\\example_visual";
    Process pro = mt.exec(cmd);
    InputStream ers= pro.getErrorStream();
    pro.waitFor();
} catch (IOException ioe) {
    ioe.printStackTrace();
} catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

After the program is executed, the example_jtl.jtl file and the example_visual folder should be generated under the /result folder.

Answer 1

I think you need to change your command from cmd to cmd /c because currently you're just kicking off a CMD instance and the rest is simply ignored.

Also be aware that it's possible to kick off a JMeter test using JMeter API, take a look at StandardJMeterEngine class JavaDoc and JMeter Command Line Overview: 5 Ways To Launch a Test article for more details if needed