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  1. ,

    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.

  2. ,

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

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via roller-user by Ben Avery, 1 year ago
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java.lang.NumberFormatException: null	at java.lang.Integer.parseInt(Integer.java:415)	at java.lang.Integer.parseInt(Integer.java:497)	at org.roller.business.utils.UpgradeDatabase.upgradeDatabase(UpgradeDatabase.java:68)	at org.roller.presentation.RollerContext.upgradeDatabaseIfNeeded(RollerContext.java:304)	at org.roller.presentation.RollerContext.contextInitialized(RollerContext.java:177)	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3692)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4127)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)	at org.apache.catalina.core.StandardService.start(StandardService.java:450)	at org.apache.catalina.core.StandardServer.start(StandardServer.java:680)	at org.apache.catalina.startup.Catalina.start(Catalina.java:536)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275)	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)