title: Remote Debugging GUI Java Application (swing) in NetBeans 8
body: <p>I setup the remote debugging in NetBeans IDE between 2 Linux systems. Remote debugging an application that does not have a GUI works ok,  but I am getting this error when I try to remote debug an application that has swing GUI:</p>
  
  <p>Exception in thread "AWT-EventQueue-0" 
  java.awt.HeadlessException: 
  No X11 DISPLAY variable was set, but this program performed an operation which requires it.</p>
  
  <p>I would appreciate any suggestion! </p>
  
  <p>NetBeans output window:</p>
  
  <p>ant -f /home/toma/NetBeansProjects/GUIFormExamples -Dremote.platform.password=***** -Dremote.platform.rp.target=linux-15 -Dremote.platform.java.spec.ver=17 -Dremote.platform.rp.filename=linux -Ddebug.class=Antenna -Dnb.internal.action.name=debug debug-remote
  init:
  Deleting: /home/toma/NetBeansProjects/GUIFormExamples/build/built-jar.properties
  deps-jar:
  Updating property file: /home/toma/NetBeansProjects/GUIFormExamples/build/built-jar.properties
  compile:
  Copying 1 file to /home/toma/NetBeansProjects/GUIFormExamples/build
  Copy libraries to /home/toma/NetBeansProjects/GUIFormExamples/dist/lib.
  To run this application from the command line without Ant, try:
  java -jar "/home/toma/NetBeansProjects/GUIFormExamples/dist/GUIFormExamples.jar"
  jar:
  Connecting to 192.168.1.122:22
  Connecting to 192.168.1.122:22
  cmd : mkdir -p '/home/toma/NetBeansProjects//GUIFormExamples/dist'
  Connecting to 192.168.1.122:22
  done.
  profile-rp-calibrate-passwd:
  Connecting to 192.168.1.122:22
  cmd : cd '/home/toma/NetBeansProjects//GUIFormExamples'; '/usr/lib/jvm/j2sdk1.7-oracle/jre/bin/java' -Xdebug -Xrunjdwp:transport=dt_socket,address=localhost:39245 -Dfile.encoding=UTF-8   -jar /home/toma/NetBeansProjects//GUIFormExamples/dist/GUIFormExamples.jar 
  Exception in thread "AWT-EventQueue-0" 
  java.awt.HeadlessException: 
  No X11 DISPLAY variable was set, but this program performed an operation which requires it.
  at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
  at java.awt.Window.(Window.java:535)</p>