Chapter 13: Problem 40

A class may have more than one constructor, as long as each has a different _________.

Short Answer

Expert verified

Answer: A class can have multiple constructors as long as each constructor has a unique signature, either in the number of parameters or the types of parameters. To distinguish between them, examine their parameters and compare their number and types for uniqueness.

Step by step solution

Signatures of a Constructor

In many programming languages, like Java, C++, or C#, a class may have multiple constructors, as long as each constructor has a unique signature. This means the number of parameters or the types of parameters must be different for each constructor. For instance, if two constructors have the same number of parameters (let's say, two), the type of at least one parameter in each constructor should be different to make their signatures unique.

Identifying Constructors

Identify all constructors within the class definition. Keep in mind that constructors have the same name as the class but don't have any return type.

Examining Constructor Signatures

Examine the parameters of each constructor for uniqueness. This involves comparing the number of parameters and their types in each constructor. If they all have unique parameters, then the class can have multiple constructors without any issue.

Example

Let's consider a class named "Person" with multiple constructors. ``` class Person { String name; int age; String address; // Constructor 1 Person(String name, int age) { this.name = name; this.age = age; } // Constructor 2 Person(String name, int age, String address) { this.name = name; this.age = age; this.address = address; } } ``` In this example, we have two constructors with different signatures. The first constructor takes two parameters (String, int), while the second constructor takes three parameters (String, int, String). As a result, the class "Person" can have multiple constructors.

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A class may have more than one constructor, as long as each has a different _________.

Short Answer

Step by step solution

Signatures of a Constructor

Identifying Constructors

Examining Constructor Signatures

Example

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