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Title: Compact canonical constructor | java.evolved

Open Graph Title: Compact canonical constructor | java.evolved

X Title: Compact canonical constructor | java.evolved

Description: Validate and normalize record fields without repeating parameter lists.

Open Graph Description: Validate and normalize record fields without repeating parameter lists.

X Description: Validate and normalize record fields without repeating parameter lists.

Opengraph URL: https://javaevolved.github.io/language/compact-canonical-constructor.html

direct link

Domain: javaevolved.github.io

Hey, it has json ld scripts: 
  {
    "@context": "https://schema.org",
    "@type": "TechArticle",
    "headline": "Compact canonical constructor",
    "description": "Validate and normalize record fields without repeating parameter lists.",
    "url": "https://javaevolved.github.io/compact-canonical-constructor.html",
    "publisher": {
        "@type": "Organization",
        "name": "java.evolved",
        "url": "https://javaevolved.github.io"
    },
    "mainEntityOfPage": {
        "@type": "WebPage",
        "@id": "https://javaevolved.github.io/compact-canonical-constructor.html"
    }
}
  
  {
    "@context": "https://schema.org",
    "@type": "BreadcrumbList",
    "itemListElement": [
        {
            "@type": "ListItem",
            "position": 1,
            "name": "Home",
            "item": "https://javaevolved.github.io/"
        },
        {
            "@type": "ListItem",
            "position": 2,
            "name": "Language",
            "item": "https://javaevolved.github.io/#language"
        },
        {
            "@type": "ListItem",
            "position": 3,
            "name": "Compact canonical constructor"
        }
    ]
}
theme-color#f97316
mobile-web-app-capableyes
apple-mobile-web-app-status-bar-styleblack-translucent
apple-mobile-web-app-titlejava.evolved
og:typearticle
og:site_namejava.evolved
og:localeen
og:imagehttps://javaevolved.github.io/og/language/compact-canonical-constructor.png
og:image:width1200
og:image:height630
og:image:typeimage/png
twitter:cardsummary_large_image
twitter:imagehttps://javaevolved.github.io/og/language/compact-canonical-constructor.png

Links:

java.evolvedhttps://javaevolved.github.io/
https://github.com/javaevolved/javaevolved.github.io
← All patternshttps://javaevolved.github.io/
←https://javaevolved.github.io/language/static-members-in-inner-classes.html
→https://javaevolved.github.io/language/call-c-from-java.html
Homehttps://javaevolved.github.io/
Languagehttps://javaevolved.github.io/#language
🐛 Report a code issuehttps://github.com/javaevolved/javaevolved.github.io/issues/new?template=code-issue.yml&title=%5BCode%20Issue%5D%20Compact%20canonical%20constructor&category=language&slug=compact-canonical-constructor
🌐 Report a translation issuehttps://github.com/javaevolved/javaevolved.github.io/issues/new?template=translation-issue.yml&title=%5BTranslation%5D%20Compact%20canonical%20constructor%20%28English%29&locale=en&pattern=compact-canonical-constructor&area=Pattern%20content
💡 Suggest a new patternhttps://github.com/javaevolved/javaevolved.github.io/issues/new?template=new-pattern.yml
𝕏https://x.com/intent/tweet?url=https%3A%2F%2Fjavaevolved.github.io%2Flanguage%2Fcompact-canonical-constructor.html&text=Compact%20canonical%20constructor%20%E2%80%93%20java.evolved
🦋https://bsky.app/intent/compose?text=Compact%20canonical%20constructor%20%E2%80%93%20java.evolved%20https%3A%2F%2Fjavaevolved.github.io%2Flanguage%2Fcompact-canonical-constructor.html
inhttps://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fjavaevolved.github.io%2Flanguage%2Fcompact-canonical-constructor.html
⬡https://www.reddit.com/submit?url=https%3A%2F%2Fjavaevolved.github.io%2Flanguage%2Fcompact-canonical-constructor.html&title=Compact%20canonical%20constructor%20%E2%80%93%20java.evolved
Let us know.https://github.com/javaevolved/javaevolved.github.io/issues/new?template=code-issue.yml&title=%5BCode%20Issue%5D%20Compact%20canonical%20constructor&category=language&slug=compact-canonical-constructor
Record (Java 21) ↗https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Record.html
JEP 395: Records ↗https://openjdk.org/jeps/395
View proof source ↗https://github.com/javaevolved/javaevolved.github.io/blob/main/proof/language/CompactCanonicalConstructor.java
Language Beginner Records for data classes Java 8 public class Point { private final int x, y; public Point(int x, int y) { ... } public int getX() { return x; } public int getY() { return y; } // equals, hashCode, toString } Java 16+ public record Point(int x, int y) {} Hover to see modern ➜ JDK 16+ → https://javaevolved.github.io/language/records-for-data-classes.html
Language Intermediate Flexible constructor bodies Java 8 class Square extends Shape { Square(double side) { super(side, side); // can't validate BEFORE super! if (side <= 0) throw new IAE("bad"); } } Java 25+ class Square extends Shape { Square(double side) { if (side <= 0) throw new IAE("bad"); super(side, side); } } Hover to see modern ➜ JDK 25+ → https://javaevolved.github.io/language/flexible-constructor-bodies.html
Errors Intermediate Record-based error responses Java 8 // Verbose error class public class ErrorResponse { private final int code; private final String message; // constructor, getters, equals, // hashCode, toString... } Java 16+ public record ApiError( int code, String message, Instant timestamp ) { public ApiError(int code, String msg) { this(code, msg, Instant.now()); } } Hover to see modern ➜ JDK 16+ → https://javaevolved.github.io/errors/record-based-errors.html
java.evolvedhttps://javaevolved.github.io/
Bruno Borgeshttps://github.com/brunoborges
GitHub Copilothttps://github.com/features/copilot
modern-css.comhttps://modern-css.com
View on GitHubhttps://github.com/javaevolved/javaevolved.github.io

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