Jfreechart without X11

I'm using Jfreechart for creating charts. I'm creating `BufferedImage` of chart and writing it in `OutputStream`. It's working fine with display environment, but its Not working In `headless` environment. Please help how do you make it work in such an environment. Exception I got in log: ``` SEVERE: Servlet.service() for servlet [appServlet] in context with path [/WebAdmin] threw exception [Handler processing failed; nested exception is java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.] with root cause java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method) at sun.awt.X11GraphicsEnvironment.access$200(X11GraphicsEnvironment.java:65) at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:110) at java.security.AccessController.doPrivileged(Native Method) at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:74) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:186) at java.awt.GraphicsEnvironment.createGE(GraphicsEnvironment.java:102) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:81) at sun.swing.SwingUtilities2.isLocalDisplay(SwingUtilities2.java:1457) at javax.swing.plaf.metal.MetalLookAndFeel.initComponentDefaults(MetalLookAndFeel.java:1556) at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(BasicLookAndFeel.java:148) at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:1592) at javax.swing.UIManager.setLookAndFeel(UIManager.java:536) at javax.swing.UIManager.setLookAndFeel(UIManager.java:576) at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1345) at javax.swing.UIManager.initialize(UIManager.java:1455) at javax.swing.UIManager.maybeInitialize(UIManager.java:1422) at javax.swing.UIManager.getDefaults(UIManager.java:656) at javax.swing.UIManager.getColor(UIManager.java:698) at org.jfree.chart.JFreeChart.<clinit>(JFreeChart.java:263) at org.jfree.chart.ChartFactory.createBarChart(ChartFactory.java:893) ``` And the part of catalina.sh I have edited: ``` # JSSE_HOME (Optional) May point at your Java Secure Sockets Extension # (JSSE) installation, whose JAR files will be added to the # system class path used to start Tomcat. # # CATALINA_PID (Optional) Path of the file which should contains the pid # of catalina startup java process, when start (fork) is used # # $Id: catalina.sh 609438 2008-01-06 22:14:28Z markt $ # ----------------------------------------------------------------------------- JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server -Xms1536m -Xmx1536m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:+DisableExplicitGC" ``` Thank you for your reply.