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Samebug tips

  1. ,

    Can occur when you try to convert a String to a numeric value but the String is not well formatted for the conversion.

  2. ,

    You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

java.lang.NumberFormatException: For input string: ""	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)	at java.lang.Integer.parseInt(Integer.java:470)	at java.lang.Integer.parseInt(Integer.java:499)	at Proj2.AddStudent(proj2.java:234)	at Proj2.actionPerformed(proj2.java:219)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)	at java.awt.Component.processMouseEvent(Component.java:6297)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3275)	at java.awt.Component.processEvent(Component.java:6062)	at java.awt.Container.processEvent(Container.java:2039)	at java.awt.Component.dispatchEventImpl(Component.java:4660)	at java.awt.Container.dispatchEventImpl(Container.java:2097)	at java.awt.Component.dispatchEvent(Component.java:4488)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)	at java.awt.Container.dispatchEventImpl(Container.java:2083)	at java.awt.Window.dispatchEventImpl(Window.java:2489)	at java.awt.Component.dispatchEvent(Component.java:4488)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:668)	at java.awt.EventQueue.access$400(EventQueue.java:81)	at java.awt.EventQueue$2.run(EventQueue.java:627)	at java.awt.EventQueue$2.run(EventQueue.java:625)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)	at java.awt.EventQueue$3.run(EventQueue.java:641)	at java.awt.EventQueue$3.run(EventQueue.java:639)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:638)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)