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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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via Oracle Community by user151917, 1 year ago
This exception has no message.
via Coderanch by Hocinema amir, 1 year ago
This exception has no message.
via Spring JIRA by Tim Lenz, 1 year ago
via Spring JIRA by Tim Lenz, 2 years ago
via knowcoding.com by Unknown author, 2 years ago
java.lang.NullPointerException at java.lang.Throwable.<init>(Throwable.java:57) at java.util.Hashtable.put(Hashtable.java:630) at oracle.apps.xdo.template.fo.elements.FOLayoutMasterSet.addChild(FOLayoutMasterSet.java:61) at oracle.apps.xdo.template.fo.elements.FOObject.init(FOObject.java:104) at oracle.apps.xdo.template.fo.elements.FOSimplePageMaster.init(FOSimplePageMaster.java:90) at java.util.Hashtable.put(Hashtable.java:630) at oracle.apps.xdo.template.fo.elements.FOLayoutMasterSet.addChild(FOLayoutMasterSet.java:61) at oracle.apps.xdo.template.fo.elements.FOObject.init(FOObject.java:104) at oracle.apps.xdo.template.fo.elements.FOSimplePageMaster.init(FOSimplePageMaster.java:90)