Java OCA OCP Practice Question 2215

Question

Choose the best option based on this program: 

import java.util.function.IntPredicate;
import java.util.stream.IntStream;

public class Main {
    public static void main(String []args) {
        IntStream temperatures = IntStream.of(-5, -6, -7, -5, 2, -8, -9);
        IntPredicate positiveTemperature = temp -> temp > 0;   // #1

        if(temperatures.anyMatch(positiveTemperature)) {       // #2
             int temp = temperatures
                              .filter(positiveTemperature)
                              .findAny()
                              .getAsInt();                    // #3
            System.out.println(temp);
        }/*  w w  w  .  j  a  v  a  2s .co  m*/
    }
}
  • A. this program results in a compiler error in line marked with comment #1
  • B. this program results in a compiler error in line marked with comment #2
  • C. this program results in a compiler error in line marked with comment #3
  • D. this program prints: 2
  • e. this program crashes by throwing java.lang.IllegalStateException


e.

Note

a stream once used-i.e., once "consumed"-cannot be used again.

In this program, anyMatch() is a terminal operation.

hence, once anyMatch() is called, the stream in temperatures is considered "used" or "consumed".

hence, calling findAny() terminal operation on temperatures results in the program throwing java.lang.IllegalStateException.




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