when i trying to post on mysql it gives me " java.lang.NullPointerException "
49
What is a NullPointerException, and how do I fix it?
6882
try catch exception always returns null
61191
Submitting form to Servlet which interacts with database results in blank page
115884
How to make a field NULL using MySQL GUI Tools?
24887
java.lang.NullPointerException at javax.faces.webapp.UIComponentClassicTagBase.setJspId
23569
weird - mysql's sql::SQLException is not caught by its type, but is caught as std::exception and cast back successfully
2116
IllegalArgumentException or NullPointerException for a null parameter?
50589
Java: Insert multiple rows into MySQL with PreparedStatement
1238
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource
119573
NullPointerException in Java with no StackTrace
43446
JSONException: Value of type java.lang.String cannot be converted to JSONObject
79586
System.NullPointerException: Attempt to de-reference a null object
480
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
40279
Mysqli_query() expects parameter 1 to be mysqli, null given? Confusing?
69771
NullPointerException when setting attribute?
124773
NullPointerException when calling service in onResume
13711
java.lang.NullPointerException at org.glassfish.hk2.classmodel.reflect.impl.TypesImpl.getType