4:[[["$","script","0",{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"{\"@context\":\"https://schema.org\",\"@type\":\"LearningResource\",\"@id\":\"https://www.coddykit.com/courses/java/method-references-optional-210\",\"name\":\"Method References & Optional\",\"url\":\"https://www.coddykit.com/courses/java/method-references-optional-210\",\"description\":\"Learn Java method references and the Optional class.\",\"learningResourceType\":\"Lesson\",\"educationalLevel\":\"Beginner to Advanced\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"isPartOf\":{\"@type\":\"Course\",\"name\":\"Java Academy\",\"url\":\"https://www.coddykit.com/courses/java\"},\"provider\":{\"@type\":\"Organization\",\"@id\":\"https://www.coddykit.com/#organization\",\"name\":\"CoddyKit\",\"url\":\"https://www.coddykit.com/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https://www.coddykit.com/logo.png\"}}}"}}],["$","script","1",{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"{\"@context\":\"https://schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https://www.coddykit.com/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Courses\",\"item\":\"https://www.coddykit.com/courses\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Java Academy\",\"item\":\"https://www.coddykit.com/courses/java\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Method References & Optional\",\"item\":\"https://www.coddykit.com/courses/java/method-references-optional-210\"}]}"}}]],["$","article",null,{"className":"lsn-wrap","children":[["$","nav",null,{"className":"lsn-crumbs","aria-label":"Breadcrumb","children":[["$","a",null,{"href":"/","children":"Home"}],["$","span",null,{"children":"/"}],["$","a",null,{"href":"/courses","children":"Courses"}],["$","span",null,{"children":"/"}],["$","a",null,{"href":"/courses/java","children":"Java Academy"}],["$","span",null,{"children":"/"}],["$","span",null,{"className":"cur","children":"Method References & Optional"}]]}],["$","header",null,{"className":"lsn-head","children":[["$","span",null,{"className":"lsn-eyebrow","children":["Java Academy"," · Lesson"]}],["$","h1",null,{"className":"lsn-title","children":"Method References & Optional"}],["$","p",null,{"className":"lsn-sub","children":"Learn Java method references and the Optional class."}]]}],["$","div",null,{"className":"lsn-body","children":[[["$","section","17723",{"className":"lsn-scene","children":[["$","h2",null,{"className":"lsn-scene-t","children":"Intro"}],["$","div",null,{"className":"cd-prose lsn-prose","dangerouslySetInnerHTML":{"__html":"

Method references are a shorthand for lambdas that call an existing method. Optional helps handle missing values safely.

"}}],null,null]}],["$","section","17724",{"className":"lsn-scene","children":[["$","h2",null,{"className":"lsn-scene-t","children":"Syntax"}],["$","div",null,{"className":"cd-prose lsn-prose","dangerouslySetInnerHTML":{"__html":"

Syntax: ClassName::methodName or object::methodName. It replaces a lambda that just calls that method.

"}}],null,null]}]],null]}],["$","aside",null,{"className":"lsn-gate","children":["$","div",null,{"className":"lsn-gate-card","children":[["$","div",null,{"className":"lsn-gate-ic","children":"🔒"}],["$","h2",null,{"children":"You've reached the end of the free preview"}],["$","p",null,{"children":"The first 2 pages of every lesson are free — the same on the web and in the app. Unlock the rest of this Java Academy lesson, and the entire learning path, with CoddyKit PRO."}],["$","div",null,{"className":"lsn-gate-actions","children":[["$","a",null,{"className":"lsn-btn-primary","href":"/subscription/subscription","children":"Go PRO →"}],["$","a",null,{"className":"lsn-btn-ghost","href":"/onboarding/preparing","children":"Open in the app"}]]}]]}]}],["$","nav",null,{"className":"lsn-nav","aria-label":"Lesson navigation","children":[["$","a",null,{"className":"lsn-nav-link prev","href":"/courses/java/functional-interfaces-209","children":[["$","span",null,{"children":"← Previous"}],["$","strong",null,{"children":"Functional Interfaces"}]]}],["$","span",null,{}]]}],["$","section",null,{"className":"lsn-toc","children":[["$","h2",null,{"children":"All lessons in this course"}],["$","ol",null,{"children":[["$","li","208",{"className":"","children":[["$","a",null,{"href":"/courses/java/lambda-syntax-scope-208","children":"Lambda Syntax & Scope"}],null]}],["$","li","209",{"className":"","children":[["$","a",null,{"href":"/courses/java/functional-interfaces-209","children":"Functional Interfaces"}],null]}],["$","li","210",{"className":"cur","children":[["$","span",null,{"children":"Method References & Optional"}],null]}]]}],["$","a",null,{"className":"lsn-back","href":"/courses/java","children":["← Back to ","Java Academy"]}]]}]]}]]