Attempt to invoke virtual method 'java.lang.String java.lang.Integer.toString()' on a null object reference
49
What is a NullPointerException, and how do I fix it?
63029
Why does the default Object.toString() include the hashcode?
139395
com.sun.istack.SAXException2 : Instance ... is substituting "java.lang.Object", but ... is bound to an anonymous type
2116
IllegalArgumentException or NullPointerException for a null parameter?
86486
StringBuilder vs String concatenation in toString() in Java
78586
Why doesn't "System.out.println" work in Android?
140738
Does setting Java objects to null do anything anymore?
38780
Checking for null before ToString()
95208
The method getText() is undefined for the type String error
289
What is a NullReferenceException, and how do I fix it?
28147
java: (String[])List.toArray() gives ClassCastException
68570
Java toString() using reflection?
75247
Convert string to nullable type (int, double, etc...)
107844
How does the .ToString() method work?
94946
The method format(String, Object[]) in the type String is not applicable for the arguments (String, int, int)
53319
ArgumentException or ArgumentNullException for string parameters?
10581
Avoiding NullPointerException in Java