Checkers:REDUN.NULL
From Insight-9.2
REDUN.NULL is reported when a variable that always has null value is used in an expression .
Vulnerability and risk
A programmer may forget to initialize the variable with its actual value or variable is redundant.
Mitigation and prevention
Use a null constant or initialize the variable properly.
Example 1
10 String search(Collection<String> strings, String prefix) {
11 String res = null;
12 for (final String string : strings) {
13 if (string.startsWith(prefix)) {
14 return string;
15 }
16 }
17 return res;
18 }
REDUN.NULL is reported for the snippet on line 17: variable 'res' is always null here.
