Socket.getOutputStream() on a null object reference
49
What is a NullPointerException, and how do I fix it?
38780
Checking for null before ToString()
46857
Compiler warning: null reference exception
30253
Get an OutputStream into a String
107828
Why does ByteArrayOutputStream use int?
45869
Why null cast a parameter?
46944
Null pointer Exception - findViewById()
54143
Why is the default value of the string type null instead of an empty string?
132398
What is null in Java?
3399
Android: Image received over socket is corrupted
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
4188
getOutputStream() has already been called for this response
31537
Checking for null before event dispatching... thread safe?
88920
Is using NULL references OK?
87728
ArgumentNullException or NullReferenceException from extension method?
21472
HttpURLConnection.getResponseCode() throws IOException when code is known