--- title: What is a Singleton? - Cracking the Java Coding... description: A brief overview of the Singleton design pattern in Java, covering lazy initialization, thread safety challenges, and recommended implementation approaches.... canonical: https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips | daily.dev og:description: A brief overview of the Singleton design pattern in Java, covering lazy initialization, thread safety challenges, and recommended implementation approaches.... og:url: https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in og:image: https://api.daily.dev/og/posts/x13vYs6In.png og:image:alt: What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips **[Java \(Official Oracle\)](https://daily.dev/sources/java-oracle)** · 1 min read · 0 upvotes · 0 comments ## Summary A brief overview of the Singleton design pattern in Java, covering lazy initialization, thread safety challenges, and recommended implementation approaches. Key points include avoiding the double-checked locking pattern, preferring enum-based singletons, and a mention of upcoming lazy constants in the JDK. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm), [#jdk](https://daily.dev/tags/jdk) [View this post on daily.dev](https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips","url":"https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in"},"datePublished":"2026-03-16T08:13:32.225Z","dateModified":"2026-03-16T08:21:00.251Z","description":"A brief overview of the Singleton design pattern in Java, covering lazy initialization, thread safety challenges, and recommended implementation approaches....","image":"https://i.ytimg.com/vi/J556rmDhh50/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/J556rmDhh50/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Java (Official Oracle)","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Java (Official Oracle)","logo":"https://media.daily.dev/image/upload/s--SM9hIYUY--/f_auto,q_auto/v1773648791/logos/java-oracle?_a=BAMAMiiu0","url":"https://daily.dev/sources/java-oracle"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/what-is-a-singleton---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-x13vys6in","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"java,jvm,jdk","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips","description":"A brief overview of the Singleton design pattern in Java, covering lazy initialization, thread safety challenges, and recommended implementation approaches....","thumbnailUrl":"https://i.ytimg.com/vi/J556rmDhh50/sddefault.jpg","uploadDate":"2026-03-16T08:13:32.225Z","duration":"PT1M","url":"https://api.daily.dev/r/x13vYs6In","embedUrl":"https://www.youtube.com/embed/J556rmDhh50"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Java (Official Oracle)","item":"https://daily.dev/sources/java-oracle"},{"@type":"ListItem","position":3,"name":"What is a Singleton? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips"}]} ```