Java OCA OCP Practice Question 2240

Question

How many changes do you need to make in order for this code to compile? 

public class Main { 
  private static double getNumber() { 
     return .007; 
  } /*from  w w  w. ja  va2  s.co  m*/
  public static void math() { 
     Supplier<double> s = Main:getNumber; 
     double d = s.get(); 
     System.out.println(d); 
  } 
}
  • A. None
  • B. One
  • C. Two
  • D. Three
  • E. Four


C.

Note

First, a method reference uses two colons, so it should be Main::getNumber().

Second, you can't use generics with a primitive, so it should be Supplier<Double>.

The rest of the code is correct, so Option C is correct.




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