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You're reading from  Java Coding Problems - Second Edition

Product typeBook
Published inMar 2024
PublisherPackt
ISBN-139781837633944
Edition2nd Edition
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Anghel Leonard
Anghel Leonard
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Anghel Leonard

Anghel Leonard is a Chief Technology Strategist and independent consultant with 20+ years of experience in the Java ecosystem. In daily work, he is focused on architecting and developing Java distributed applications that empower robust architectures, clean code, and high-performance. Also passionate about coaching, mentoring and technical leadership. He is the author of several books, videos and dozens of articles related to Java technologies.
Read more about Anghel Leonard

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88. Implementing interfaces in records

Java records cannot extend another class but they can implement any interface exactly as a typical class. Let's consider the following interface:

public interface PestInspector {
  public default boolean detectPest() {
    return Math.random() > 0.5d;
  }
  public void exterminatePest();
}

The following snippet of code is a straightforward usage of this interface:

public record MelonRecord(String type, float weight)  
       implements PestInspector {
      
  @Override
  public void exterminatePest() { 
     
    if (detectPest()) {
      System.out.println("All pests have been exterminated");
    } else {
      System.out.println(
        "This melon is clean, no pests have been found");
    }
  }
}

Notice that the code overrides the abstract method exterminatePest() and calls the default method detectPest().

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Java Coding Problems - Second Edition
Published in: Mar 2024Publisher: PacktISBN-13: 9781837633944

Author (1)

author image
Anghel Leonard

Anghel Leonard is a Chief Technology Strategist and independent consultant with 20+ years of experience in the Java ecosystem. In daily work, he is focused on architecting and developing Java distributed applications that empower robust architectures, clean code, and high-performance. Also passionate about coaching, mentoring and technical leadership. He is the author of several books, videos and dozens of articles related to Java technologies.
Read more about Anghel Leonard