Strange Null pointer exception case: ternary conditional operator not working with string concatenation

Question

StringBuffer sb=null;

// Some more logic that conditionally assigns value to the StringBuffer

// Prints Value=null
System.out.println(\"Value=\"+sb);

// Throws Nu         


        

Answer 1

the exception is cause when sb.toString() gets executed.

In the fix you check if sb is null before executing so the offending call is not attempted.