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Java SE 8 Programmer II (1Z0-809)

Question : 2

Total: 8

Given:

class Toy { 
    double price; 
    String color; 
    Toy(String color, double price) { 
        this.color = color; 
        this.price = price; 
    } 
    public double getPrice() { 
        return price; 
    } 
    public String getColor() { 
        return color; 
    } 
}

And given the code fragment:

List toys = new ArrayList<>(); 
toys.add(new Toy("red", 10)); 
toys.add(new Toy("yellow", 10)); 
toys.add(new Toy("red", 10)); 
double totalPrice = toys.stream() 
    .filter(e -> e.getColor() == "red") 
    /* Line n1 */ 
    .sum(); 
System.out.println("Total Price of Red Toys: " + totalPrice);

Which code fragment can be inserted at Line n1 to enable the code to print Total Price of Red Toys: 20.0?

.flatMap(e -> e.getPrice())
.mapToDouble(e -> e.getPrice())
.map(e -> e.getPrice())
.peek(e -> e.getPrice())

Validate

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