query: Exception java.lang.NumberFormatException: null in servlets
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 51450
negative_passages.text: Tomcat (7, 8) fails to start with java.lang.ClassNotFoundException: org.apache.tomcat.util.res.StringManager
negative_passages.docid: 126169
negative_passages.text: Servlet constructor and init() method
negative_passages.docid: 80949
negative_passages.text: ClassNotFoundException/NoClassDefFoundError in my Java web application
negative_passages.docid: 124773
negative_passages.text: NullPointerException when calling service in onResume
negative_passages.docid: 35590
negative_passages.text: How to fix NullPointerException in Java?
negative_passages.docid: 29271
negative_passages.text: *.xhtml url-pattern causes java.lang.NullPointerException at com.sun.faces.context.flash.ELFlash.loggingGetPhaseMapForReading
negative_passages.docid: 24517
negative_passages.text: MVC Spring Implementation - error: java.lang.NullPointerException
negative_passages.docid: 70858
negative_passages.text: java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at com.sun.faces.renderkit.ServerSideStateHelper.getState
negative_passages.docid: 289
negative_passages.text: What is a NullReferenceException, and how do I fix it?
negative_passages.docid: 6882
negative_passages.text: try catch exception always returns null
negative_passages.docid: 35129
negative_passages.text: Why does String.valueOf(null) throw a NullPointerException?
negative_passages.docid: 98080
negative_passages.text: Android: Cannot invoke toString() on the primitive type int
negative_passages.docid: 137692
negative_passages.text: NullPointerException when working with arrays
negative_passages.docid: 92797
negative_passages.text: How to debug NullPointerException in selenium-java
negative_passages.docid: 82423
negative_passages.text: java.lang.StringIndexOutOfBoundsException: String index out of range
negative_passages.docid: 79477
negative_passages.text: Why is "null" present in C# and Java?