“Wrong” return type when using if vs. ternary opertator in Java

by

Basically it’s following the rules of section 15.25 of the JLS, specifically:

Otherwise, if the second and third operands have types that are convertible (§5.1.8) to numeric types, then there are several cases:

  • […]

  • Otherwise, binary numeric promotion (§5.6.2) is applied to the operand types, and the type of the conditional expression is the promoted type of the second and third operands.

So section 5.6.2 is followed, which will basically involves unboxing – so this makes your expression work as if longValue and doubleValue were of types long and double respectively, and the widening promotion is applied to the long to get an overall result type of double.

That double is then boxed in order to return an Object from the method.

More Related Contents:

  1. Code after if block inside a for loop doesn’t work
  2. Why can't we declare variables in if statement?
  3. java if else errors not working properly
  4. Repeat the “if” statement if it has to go to the “else” statement
  5. Why am I getting “Error: ‘else’ without ‘if'”? [duplicate]
  6. Write 1 line If statement using ternary operator in JAVa
  7. New to Java and having issues writing and example
  8. What is the relative performance difference of if/else versus switch statement in Java?
  9. What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
  10. How can I check if an app running on Android?
  11. Differences between System.out.println() and return in Java
  12. Ternary Operator – JAVA [duplicate]
  13. Best way to format multiple ‘or’ conditions in an if statement
  14. Compiler error when declaring a variable inside if condition and no curly braces
  15. Java Swing; Two classes, where to put if statements and new actionlisteners?
  16. How to avoid a lot of if else conditions
  17. What is better: multiple “if” statements or one “if” with multiple conditions?
  18. Java – why no return type based method overloading?
  19. Unexpected type resulting from the ternary operator
  20. How to check if a string starts with one of several prefixes?
  21. How to use this boolean in an if statement?
  22. Java if vs. try/catch overhead
  23. What does the return keyword do in a void method in Java?
  24. Why doesn’t this method work? Java ternary operator
  25. Short IF – ELSE statement
  26. Why Java does not see that Integers are equal?
  27. Java – Does returning a value break a loop?
  28. If-else working, switch not [duplicate]
  29. ternary operator not working
  30. How is if/while condition evaluated when we use assignments instead of comparison?

Leave a Comment