How to Enable the GUI at Linux terminal.

[oraqwt@prd1 ~]$ dbca

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11.XToolkit

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:264)

        at java.awt.Toolkit$2.run(Toolkit.java:860)

        at java.awt.Toolkit$2.run(Toolkit.java:855)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:854)

        at com.jgoodies.looks.LookUtils.isLowResolution(LookUtils.java:484)

        at com.jgoodies.looks.LookUtils.<clinit>(LookUtils.java:249)

        at com.jgoodies.looks.plastic.PlasticLookAndFeel.<clinit>(PlasticLookAndFeel.java:135)

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:348)

        at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1879)

        at javax.swing.UIManager.setLookAndFeel(UIManager.java:582)

        at oracle.install.commons.util.Application.startup(Application.java:976)

        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)

        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:198)

        at oracle.assistants.common.base.driver.AssistantApplication.startup(AssistantApplication.java:336)

        at oracle.assistants.dbca.driver.DBConfigurator.startup(DBConfigurator.java:378)

        at oracle.assistants.dbca.driver.DBConfigurator.main(DBConfigurator.java:513)

To resolve issue  I have used below command to display.

[oraqwt@prd1 ~]$ cat dis.sh

export DISPLAY=:0.0;