运行virgoftp出现问题，帮我看一下，谢谢！

wintersky

1. [root@localhost virgoftp]# ./virgoftp
   
2. start the VirgoFtp
   
3. 6- 6月-06 7:39:27 下午 edu.sysu.virgoftp.gui.VirgoFTP main
   
4. INFO: display the splash
   
5. 6- 6月-06 7:39:47 下午 edu.sysu.virgoftp.gui.VirgoFTP main
   
6. INFO: load the preference
   
7. java.net.MalformedURLException: Absolute URL required with null context: /root/.virgoftp/preference.xml
   
8.    at java.net.URL.<init> (libgcj.so.7)
   
9.    at java.net.URL.<init> (libgcj.so.7)
   
10.    at gnu.xml.aelfred2.XmlParser.pushURL (libgcj.so.7)
    
11.    at gnu.xml.aelfred2.XmlParser.doParse (libgcj.so.7)
    
12.    at gnu.xml.aelfred2.SAXDriver.parse (libgcj.so.7)
    
13.    at gnu.xml.aelfred2.XmlReader.parse (libgcj.so.7)
    
14.    at gnu.xml.aelfred2.XmlReader.parse (libgcj.so.7)
    
15.    at edu.sysu.virgoftp.gui.preferences.zeusPref.PreferencesImpl.unmarshal (Unknown Source)
    
16.    at edu.sysu.virgoftp.gui.preferences.zeusPref.PreferencesUnmarshaller.unmarshal (Unknown Source)
    
17.    at edu.sysu.virgoftp.gui.preferences.Preference.load (Unknown Source)
    
18.    at edu.sysu.virgoftp.gui.preferences.Preference.load (Unknown Source)
    
19.    at edu.sysu.virgoftp.gui.VirgoFTP.main (Unknown Source)
    
20. 6- 6月-06 7:39:47 下午 edu.sysu.virgoftp.gui.VirgoFTP main
    
21. INFO: create the Contents of the Shell
    
22. Exception in thread "main" java.lang.NullPointerException
    
23.    at java.lang.Object.getClass (libgcj.so.7)
    
24.    at edu.sysu.virgoftp.gui.preferences.QuickLoginPreference.getSaveCount (Unknown Source)
    
25.    at edu.sysu.virgoftp.gui.widgets.FTPToolBar.<init> (Unknown Source)
    
26.    at edu.sysu.virgoftp.gui.VirgoFTP.creatToolBar (Unknown Source)
    
27.    at edu.sysu.virgoftp.gui.VirgoFTP.createShellContents (Unknown Source)
    
28.    at edu.sysu.virgoftp.gui.VirgoFTP.main (Unknown Source)
    
29. [root@localhost virgoftp]#

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不知道是不是因为Java的问题，是否一定要装个jre?
谢谢关注！