Why is a NullPointerException being thrown?
49
What is a NullPointerException, and how do I fix it?
64200
Can Java's NullPointerException be changed to report on which variable was null?
68713
Why is it Valid to Concatenate Null Strings but not to Call "null.ToString()"?
11537
What is IndexOutOfBoundsException? How can I fix it?
133927
Java variable might not have been initialized?
54143
Why is the default value of the string type null instead of an empty string?
72675
I don't understand why this is causeing my program to crash?
128709
Why is there a `null` value in JavaScript?
52076
Why is an ArrayList parameter modified, but not a String parameter?
96453
Caught Throwable or Exception is null
28147
java: (String[])List.toArray() gives ClassCastException
45196
Calling class method through NULL class pointer
152510
Why is document.GetElementById returning null
128142
java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22)
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
39781
Why does the is operator return false when given null?
79586
System.NullPointerException: Attempt to de-reference a null object