title: Why am I getting the following error when starting a Java application?
body: <p><a href="https://i.stack.imgur.com/UZbGB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UZbGB.png" alt="enter image description here" /></a>The application failed to run
  Because the port is in use. I don't know which port to close to run the application.</p>