hello!why I get such errs
Exception in thread “main” java.lang.NullPointerException
at org.jivesoftware.messenger.launcher.Launcher$1.actionPerformed(Launcher.java:14 3)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
at javax.swing.AbstractButton.doClick(AbstractButton.java:282)
at org.jivesoftware.messenger.launcher.Launcher.(Launcher.java:243)
at org.jivesoftware.messenger.launcher.Launcher.main(Launcher.java:250)