NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
49
What is a NullPointerException, and how do I fix it?
87189
System.NullPointerException
58054
When is it OK to catch NullPointerException?
2146
object==null or null==object?
96453
Caught Throwable or Exception is null
156920
Java.lang.verifyerror how do I fix or even find out the root cause?
97224
Implementing the equals method in java
141442
Why does my string comparison fail?
155686
What is a reason of placing boolean or null before comparison operator?
124773
NullPointerException when calling service in onResume
78156
String.equals() with multiple conditions (and one action on result)
5608
Overriding the java equals() method - not working?
147409
String.equals versus ==
152371
equals vs Arrays.equals in Java
73430
C# .Equals(), .ReferenceEquals() and == operator
119573
NullPointerException in Java with no StackTrace
120808
Why AbstractCollection does not implement equals()?