Interface: Interface is a reference type in Java, which contains a collection of abstract methods. An interface needs to the follow certain conditions such as: One cannot instantiate an interface. Interfaces do not contain any constructors. All methods present in the interface are abstracts. An interface does not contain any instance field. An interface cannot be extended by a class. Comparable Interface : A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects. Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects. Example: //java langauage package for comaprable interface package java.lang //comparable interface definition public interface Comparable <E> { //use of compareTo to compare objects public integer compareTo(E o); } The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

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Answer 1

Question

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

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Answer 2

Question

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Answer 6

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Answer 7

Chapter 13.6, Problem 13.6.2CP

Program Plan Intro

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors.

All methods present in the interface are abstracts.

An interface does not contain any instance field.

An interface cannot be extended by a class.

Comparable Interface:

A comparable interface is a generic interface that defines the compareTo() method that is used for comparing objects.

Using comparable interface, one can choose the properties of the objects, rather than the reference location of the objects.

Example:

//java langauage package for comaprable interface

package java.lang

//comparable interface definition

public interface Comparable <E>

{

//use of compareTo to compare objects

public integer compareTo(E o);

}

The compareTo() method determines the order of this object with the specified object “o” and returns a negative integer, zero or positive integer, if this object is less than, equal to or greater than object “o”.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 13.2 - Prob. 13.2.1CP Ch. 13.2 - The getArea() and getPerimeter() methods may be...Ch. 13.2 - True or false? a.An abstract class can be used...Ch. 13.3 - Prob. 13.3.1CP Ch. 13.3 - Prob. 13.3.2CP Ch. 13.3 - Prob. 13.3.3CP Ch. 13.3 - What is wrong in the following code? (Note the...Ch. 13.3 - What is wrong in the following code? public class...Ch. 13.4 - Can you create a Calendar object using the...Ch. 13.4 - Prob. 13.4.2CP

Solution Summary: The author explains that an interface is a reference type in Java, which contains abstract methods. Comparable interface defines the compareTo() method for comparing objects.

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Chapter 13 Solutions