Chapter 19, Problem 13RE

Explanation of Solution

“orElse” clauses in Section 19.10.2:

//Line1-Initialize the array

double[] values = . .,;

// Line 2-Compute total

double total = DoubleStream.of(values).sum();

// Line 3-Compute average

double average = DoubleStream.of(values).average().orElse(0);

// Line 4-Get largest value

double largest = DoubleStream.of(values). max(). orElse(Double.MIN_VALUE);

// Line 5-Get smallest value

Double smallest = DoubleStream.of(values). min(). orElse(Double.MAX_VALUE);

Explanation:

• The method “orElse()” accepts any value as a “T” type parameter to return if there exists no value.
• A specialization of “DoubleStream” is a series of double-valued elements supporting sequential and parallel aggregate operations.
• Assume that the array “values” in line number “1” is initialized as follows,

  //Initialize the array

double[] values = {10.5,15.5,20.5,5.5};

• The statement in line number “2” returns the sum of the array values as “52...