toString()
that are used in the following cases:
java.lang.StringBuilder#append()
or java.lang.StringBuffer#append()
methodsjava.io.PrintWriter
or java.io.PrintStream
org.slf4j.Logger
In these cases, conversion to string will be handled by the underlying library methods, and the explicit call to toString()
is not needed.
Example:
System.out.println(this.toString())
After the quick-fix is applied:
System.out.println(this)
Note that without the toString()
call, the code semantics might be different: if the expression is null,
then the null
string will be used instead of throwing a NullPointerException
.
Use the Report only when qualifier is known to be not-null option to avoid warnings for the values that could potentially be null.