“hashCode” method: The hash code is an integer value which is the characteristic of an object. The hashing algorithm is used to evaluate a hash code for an object. Different objects in the code contain same data and a hashing algorithm should give the same hash code for both. For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value. “equals” method: The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument. This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

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Answer 1

Question

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

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Answer 2

Question

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

Expert Solution & Answer

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Answer 3

Question

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

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Answer 4

Question

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

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Answer 5

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

Answer 6

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

Answer 7

Chapter 18, Problem 14SA

Program Plan Intro

“hashCode” method:

The hash code is an integer value which is the characteristic of an object.

The hashing algorithm is used to evaluate a hash code for an object.

Different objects in the code contain same data and a hashing algorithm should give the same hash code for both.

For example, if the user wants to evaluate the hash code for a string, he would use the characters making up the string in the calculation. Possibly the user would use each character’s Unicode value in a mathematical formula which would give us an integer value.

“equals” method:

The “equals” method finds whether the number object which invokes the method is equal to the object which is passed as an argument.

This method will return “false” if the argument is null and the argument is an object of the different type with the different numeric value.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 18.1 - Prob. 18.1CP Ch. 18.1 - What are the three general types of collections?Ch. 18.1 - Prob. 18.3CP Ch. 18.1 - Prob. 18.4CP Ch. 18.1 - Prob. 18.5CP Ch. 18.1 - Prob. 18.6CP Ch. 18.1 - Prob. 18.7CP Ch. 18.2 - Prob. 18.8CP Ch. 18.2 - Prob. 18.9CP Ch. 18.2 - Prob. 18.10CP

Solution Summary: The author explains how the hashing algorithm evaluates an object's integer value. The "equals" method finds whether the number object invoked is equal to the object passed as an argument.

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