Java OCA OCP Practice Question 423

Question

What is the output of the following code snippet? 

int hops = 0; 
int myField = 0; 
myField = hops++; 
if(myField) 
       System.out.print("Jump!"); 
else 
       System.out.print("Hop!");
  • A. Jump!
  • B. Hop!
  • C. The code does not compile.
  • D. The code compiles but throws an exception at runtime. 


C.

Note

The value of myField and hops is unimportant because this code does not compile, making Option C the correct answer.

Unlike some other programming languages, Java does not automatically convert integers to boolean values for use in if-then statements.

The statement if(myField) evaluates to if(0), and since 0 is not a boolean value, the code does not compile.

Note that the value of the myField variable is irrelevant in this example; no integer evaluates to a boolean value in Java.




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