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You're reading from  Kotlin Design Patterns and Best Practices - Second Edition

Product typeBook
Published inJan 2022
Reading LevelBeginner
PublisherPackt
ISBN-139781801815727
Edition2nd Edition
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Author (1)
Alexey Soshin
Alexey Soshin
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Alexey Soshin

Alexey Soshin is a software architect with 15 years of experience in the industry. He started exploring Kotlin when Kotlin was still in beta, and since then has been a big enthusiast of the language. He's a conference speaker, published writer, and the author of a video course titled Pragmatic System Design.
Read more about Alexey Soshin

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Constructor overload

In Java, we're used to having overloaded constructors. For example, let's look at the following Java class, which requires the a parameter and defaults the value of b to 1:

class User { 
    private final String name; 
    private final boolean resetPassword; 
    public User(String name) { 
        this(name, true); 
    } 
 
    public User(String name, boolean resetPassword) { 
        this.name = name; 
        this.resetPassword = resetPassword; 
    } 
}

We can simulate the same behavior in Kotlin by defining multiple constructors using the constructor keyword:

class User(val name: String, val resetPassword: Boolean) {
    constructor(name: String) : this(name, true)
}

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Kotlin Design Patterns and Best Practices - Second Edition
Published in: Jan 2022Publisher: PacktISBN-13: 9781801815727

Author (1)

author image
Alexey Soshin

Alexey Soshin is a software architect with 15 years of experience in the industry. He started exploring Kotlin when Kotlin was still in beta, and since then has been a big enthusiast of the language. He's a conference speaker, published writer, and the author of a video course titled Pragmatic System Design.
Read more about Alexey Soshin