Java HashMap.put throwing NullPointerException with "new" keyword
49
What is a NullPointerException, and how do I fix it?
103629
Why does object.__new__ work differently in these three cases
89755
Why is "throw null" not creating a compilation error in Java?
110506
Java: how to convert HashMap to array
40587
Why not allow an external interface to provide hashCode/equals for a HashMap?
24676
What is the preferred/idiomatic way to insert into a map?
81518
Find out what variable is throwing a NullPointerException programmatically
74320
Java Hashmap: How to get key from value?
38263
How can I combine two HashMap objects containing the same types?
62369
Iterate through a HashMap
85964
Android: ClassNotFoundException when passing serializable object to Activity
25288
How to make HashMap work with Arrays as key?
65689
getting exception while putting list data into the map
3648
this class is not key value coding-compliant for the key XXXXXX
69771
NullPointerException when setting attribute?
23964
Why does Java have a "NullPointerException" when there are no pointers in Java?
73034
StringBuilder append() and null values