错误代码如下：Exception in thread "main" 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.<clinit>(X11GraphicsEnvironment.java:77)
        at java.lang.Class.forName1(Native Method)
        at java.lang.Class.forName(Class.java:142)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:72)
        at java.awt.Font.initializeFont(Font.java:285)
        at java.awt.Font.<init>(Font.java:319)
        at javax.swing.plaf.FontUIResource.<init>(FontUIResource.java:51)
        at javax.swing.plaf.basic.BasicLookAndFeel.getFont(BasicLookAndFeel.java:252)
        at javax.swing.plaf.basic.BasicLookAndFeel.initComponentDefaults(BasicLookAndFeel.java:271)
        at javax.swing.plaf.metal.MetalLookAndFeel.initComponentDefaults(MetalLookAndFeel.java:210)
        at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(BasicLookAndFeel.java:80)
        at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:1088)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:408)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:435)
        at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:895)
        at javax.swing.UIManager.initialize(UIManager.java:991)
        at javax.swing.UIManager.maybeInitialize(UIManager.java:974)
        at javax.swing.UIManager.getDefaults(UIManager.java:495)
        at javax.swing.UIManager.get(UIManager.java:586)
        at com.ibm.db2.tools.common.CommonUIManager.initialize(Unknown Source)
        at CC.setLookAndFeel(Unknown Source)
        at CC.<init>(Unknown Source)
        at CC.main(Unknown Source)
DB2JAVIT : RC = 1

起X，设置DISPLAY环境变量
export DISPLAY=localhost:0.0

$ xhost +
1356-200 xhost unable to open display ""
$ export DISPLAY=192.168.1.252:0.0
$ xhost +

是这样吗？但还是启不来啊

你是太新手了吧
基本功需要好好锻炼
msn联系

应该这样写:

su - root
xhost +
su - db2inst1
export DISPLAY=你机器的IP地址:0.0
db2cc

我是这样起的：安装完后以用DB2实例用户登录AIX图形环境，执行实例用户目录下的.profile，如实例db2inst1，则可以：   .  /home/db2inst1/.profile，然后再运行命令如db2cc     db2ca就可以启动图形界面了。