[root@localhost LumaQQ]# ./lumaqq
Exception in thread "main" java.lang.NullPointerException
at starlight.util.Base64.encode(Unknown Source)
at edu.tsinghua.lumaqq.shells.LoginDialog.setLoginValue(LoginDialog.java:325)
at edu.tsinghua.lumaqq.shells.LoginDialog.doOk(LoginDialog.java:29
at edu.tsinghua.lumaqq.shells.LoginDialog.access$1(LoginDialog.java:281) at edu.tsinghua.lumaqq.shells.LoginDialog$2.mouseUp(LoginDialog.java:215)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:136)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:939)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1953)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1726)
at edu.tsinghua.lumaqq.shells.LoginDialog.open(LoginDialog.java:441)
at edu.tsinghua.lumaqq.LumaQQ.main(LumaQQ.java:76)
[root@localhost LumaQQ]#
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谁能帮我解释一下需要怎么做啊?