method selectProduct() gets "java.lang.NullPointerException". error
49
What is a NullPointerException, and how do I fix it?
88764
java.lang.IllegalStateException: Illegal attempt to set ViewHandler after a response has been rendered
66284
NullPointerException when Creating an Array of objects
49317
The method format(String, Object[]) in the type String is not applicable for the arguments (...)
40818
What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
136725
ResultSet.getString(1) throws java.sql.SQLException: Invalid operation at current cursor position
138022
PreparedStatement setNull(..)
94342
Java - class.getResource returns null
137692
NullPointerException when working with arrays
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
35016
java.lang.NullPointerException at org.primefaces.component.datatable.feature.FilterFeature.filter
10867
How to avoid ArrayIndexOutOfBoundsException or IndexOutOfBoundsException?
112328
Error: "an object reference is required for the non-static field, method or property..."
119573
NullPointerException in Java with no StackTrace
33739
preparedStatement syntax error
124773
NullPointerException when calling service in onResume
32065
Attempt to de-reference a null object: Trigger