a. Stream <String> : A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string. Expression to compute the number of elements starts with letter “a”: words.filter(w -> w.startsWith("a")).count() The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

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Answer 1

Expert Solution & Answer

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

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In the previous homework scenario problem below: You have been hired by TechCo to create and manage their employee training portal. Your first task is to develop a program that will create and track different training sessions in the portal. Each training session has the following properties: • A session ID (e.g., "TECH101", "TECH205") • A session title (e.g., "Machine learning", "Advanced Java Programming") • A total duration in hours (e.g., 5.0, 8.0) • Current number of participants (e.g., 25) Each session must have at least a session ID and a total duration and must met the following requirements: • The maximum participant for each session is 30. • The total duration of a session must not exceed 10 hours. • The current number of participants should never exceed the maximum number of participants. Design an object-oriented solution to create a data definition class(DDC) and an implementation class for the session object. In the DDC, a session class must include: • Constructors to…

Answer 2

Expert Solution & Answer

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

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Answer 3

Expert Solution & Answer

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

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Answer 4

Expert Solution & Answer

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

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Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

Answer 8

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Answer 9

Chapter 19, Problem 1RE

Explanation of Solution

a.

Stream<String>:

A stream is an immutable sequence of values that are processed lazily which means that accept the operations that are needed and skip the unnecessary operations. The stream library uses the lambda expressions. When using the lambda function with “Stream<String>”, the Java compiler will configure that the given object is string.

Expression to compute the number of elements starts with letter “a”:

words.filter(w -> w.startsWith("a")).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String and returns the Boolean value based on the specified letter or word. Then, the “count()” method counts the number of elements in the steam.

Answer 10

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Answer 11

Explanation of Solution

b.

Expression to compute the number of elements whose length greater than ten starts with letter “a”:

words.filter(w -> w.startsWith("a")).filter(w -> w.length() > 10).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and also checks whether the length of the string is greater than “10” and the “count()” method counts the number of elements in the steam that satisfies the given condition.

Answer 12

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

Answer 13

Explanation of Solution

c.

Expression to compute the number of elements that limits to 100 that starts with letter “a”:

words.filter(w -> w.startsWith("a")).limit(100).count()

The “filter” method yields a stream of all elements that satisfies the given condition and “w” is the parameter variable. Here, the “startsWith()” method is used to check the prefix of a String “a” and the “limit()” method restricts the number of elements to 100. Finally, the “count()” method counts the number of elements in the steam.

Answer 14

Ch. 19.1 - Prob. 1SC Ch. 19.1 - Prob. 2SC Ch. 19.1 - Prob. 3SC Ch. 19.1 - Prob. 4SC Ch. 19.1 - Prob. 5SC Ch. 19.1 - Prob. 6SC Ch. 19.2 - Prob. 7SC Ch. 19.2 - Prob. 8SC Ch. 19.2 - Prob. 9SC Ch. 19.2 - Prob. 10SC

Explanation of Solution

Explanation of Solution

Explanation of Solution

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Chapter 19 Solutions