如何在Linux中安装适用于Java 7的DCEVM？

[admin@LINUXBOX jdk1.7.0_55]$java -jar DCEVM-full-7u79-installer.jar
java.awt.HeadlessException:
No X11 DISPLAY variable was set,but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
at java.awt.Window.<init>(Window.java:535)
at java.awt.Frame.<init>(Frame.java:420)
at javax.swing.JFrame.<init>(JFrame.java:224)
at com.github.dcevm.installer.MainWindow.<init>(MainWindow.java:43)
at com.github.dcevm.installer.Main.main(Main.java:46)
Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set,but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
at java.awt.Window.<init>(Window.java:535)
at java.awt.Frame.<init>(Frame.java:420)
at java.awt.Frame.<init>(Frame.java:385)
at javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1757)
at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1832)
at javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1697)
at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:863)
at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:667)
at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:638)
at com.github.dcevm.installer.Main.main(Main.java:51)

如果需要,我也准备使用安装了Desktop Linux的Virtual Box来尝试,然后我可以将(修补的JDK)复制到我原来的Linux框中.

那么,如何在Linux上安装DCEVM(对于Java 7)？我需要一台基于桌面的Linux吗？

编辑：
这是Sharad的第一个答案建议的几个命令的输出：

[admin@TESTBEDPEGSEARCH jdk1.7.0_55]$echo $DISPLAY

[admin@TESTBEDPEGSEARCH jdk1.7.0_55]$java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03,mixed mode)

EDIT2：
我在Windows中使用DCEVM相当长的时间.