Question

if(!dataFolder.isHidden())
          if(System.getProperty("os.name").toLowerCase()
                              .indexOf("windows") > -1){
             String command = "attrib +h -r -s " + dataFolder.getAbsolutePath();
             Runtime.getRuntime().exec(command);
             System.out.println(command);
          }

I’m running the code above, and there is no way I can get it to work. I want to make the “.data” folder hidden, not read-only and not a system folder, but it gets created visible and read-only.

This is the output of the System.out.println line:

attrib +h -r -s D:\eclipse\bin\.data

I’m also unable to use the exitValue() method of the process because it always complains about:

java.lang.IllegalThreadStateException: process has not exited

What am I doing wrong?

Answer 1

You should call the Process.waitFor() method first. This method will block until the attrib process has exited. A process will not have an exit code until it has finished.