Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

[alx]

При нажатии кнопки "Войти под другим именем" возникает два исключения:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at sip.client.User.equals(User.java:314)
        at javax.swing.JComboBox.contentsChanged(JComboBox.java:1328)
        at javax.swing.JComboBox.intervalRemoved(JComboBox.java:1351)
        at javax.swing.AbstractListModel.fireIntervalRemoved(AbstractListModel.java:179)
        at javax.swing.DefaultComboBoxModel.removeAllElements(DefaultComboBoxModel.java:174)
        at sip.client.LoginForm.setModel(LoginForm.java:47)
        at sip.client.MainFrame.ChangeUsrMouseClicked(MainFrame.java:2018)
        at sip.client.MainFrame.access$4700(MainFrame.java:86)
        at sip.client.MainFrame$43.mouseClicked(MainFrame.java:1444)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
        at java.awt.Component.processMouseEvent(Component.java:6519)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
        at java.awt.Component.processEvent(Component.java:6281)
        at java.awt.Container.processEvent(Container.java:2229)
        at java.awt.Component.dispatchEventImpl(Component.java:4872)
        at java.awt.Container.dispatchEventImpl(Container.java:2287)
        at java.awt.Component.dispatchEvent(Component.java:4698)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4501)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
        at java.awt.Container.dispatchEventImpl(Container.java:2273)
        at java.awt.Window.dispatchEventImpl(Window.java:2719)
        at java.awt.Component.dispatchEvent(Component.java:4698)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
        at java.awt.EventQueue.access$200(EventQueue.java:103)
        at java.awt.EventQueue$3.run(EventQueue.java:694)
        at java.awt.EventQueue$3.run(EventQueue.java:692)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
        at java.awt.EventQueue$4.run(EventQueue.java:708)
        at java.awt.EventQueue$4.run(EventQueue.java:706)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Exception in thread "Timer-2" java.lang.NullPointerException
        at sip.client.GlobalVars.CheckRecord(GlobalVars.java:816)
        at sip.client.MainFrame$5.run(MainFrame.java:583)
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)

[san]

Milestone deleted