Why does it throw NullPointerException in this Case?
49
What is a NullPointerException, and how do I fix it?
52076
Why is an ArrayList parameter modified, but not a String parameter?
39781
Why does the is operator return false when given null?
1605
What is the reason behind "non-static method cannot be referenced from a static context"?
8738
Should a retrieval method return 'null' or throw an exception when it can't produce the return value?
58054
When is it OK to catch NullPointerException?
78586
Why doesn't "System.out.println" work in Android?
134689
Setting an object to null vs Dispose()
23964
Why does Java have a "NullPointerException" when there are no pointers in Java?
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
98908
Is it good practice to set variables to null when they are no longer needed?
480
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
79477
Why is "null" present in C# and Java?
28147
java: (String[])List.toArray() gives ClassCastException
54143
Why is the default value of the string type null instead of an empty string?
107844
How does the .ToString() method work?
38780
Checking for null before ToString()