title: java.net.BindException: Address already in use: JVM_Bind
body: <p>I got this error after running my client in java.</p>
  
  <p>run:</p>
  
  <pre><code>Oct 01, 2017 8:08:07 AM from_sever.From_sever main
  SEVERE: null
  java.net.BindException: Address already in use: JVM_Bind
      at java.net.DualStackPlainSocketImpl.bind0(Native Method)
      at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106)
      at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
      at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
      at java.net.ServerSocket.bind(ServerSocket.java:375)
      at java.net.ServerSocket.&lt;init&gt;(ServerSocket.java:237)
      at java.net.ServerSocket.&lt;init&gt;(ServerSocket.java:128)
      at from_sever.From_sever.main(From_sever.java:26)
  </code></pre>