{"@context":"http://schema.org","@type":"Question","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new","text":"Что будет выведено на экран?\n\u003cpre\u003e\u003ccode class\u003d\"java\"\u003e\npublic class Tasks {\n    public static Tasks instance \u003d new Tasks();\n    private static final int DELTA \u003d 5;\n    private static int BASE \u003d 7;\n    private int x;\n\n    public Tasks() {\n        x \u003d BASE + DELTA;\n    }\n\n    public static void main(String[] args) {\n        System.out.println(Tasks.instance.x);\n    }\n}\n\u003c/code\u003e\u003c/pre\u003e","headline":"Что будет выведено на экран?\n\u003cpre\u003e\u003ccode class\u003d\"java\"\u003e\npublic class Tasks {\n    public static Tasks instance \u003d ","learningResourceType":["programming test","programming course","programming question"],"isPartOf":{"@type":"Course","@id":"https://codegalaxy.io/courses/java-ru","url":"https://codegalaxy.io/courses/java-ru","name":"Java Quiz","description":"Java - объектно-ориентированный кросс-платформенный язык программирования, предназначенный для удобства чтения и интероперабельности. Java обычно читается как легкая и простая версия языка Си++. Тем не менее, Java может использоваться как полная версия для создания приложений, которые могут работать на всех платформах, поддерживающих Java, без необходимости перекомпиляции. В 2020 году Java является самым популярным языком программирования, с которым работают более 9 миллионов разработчиков. \u003cbr\u003e\nЭтот обучающий курс полностью посвящен \u003cstrong\u003eJava языку\u003c/strong\u003e, где вы можете проверить свои знания и ответить на \u003cstrong\u003e вопросы интервью по Java\u003c/strong\u003e. Вы ответите на теоретические и практические вопросы, которые проверяют ваши навыки на понимание \u003cstrong\u003e Java-кода\u003c/strong\u003e и поиска ошибок.\n\u003cbr\u003e\nВы можете вернуться к этому java курсу когда захотите, так как он постоянно обновляется и добавляются новые вопросы и задачки!\n\nПереведено с помощью www.DeepL.com/Translator (бесплатная версия)","provider":{"@type":"Organization","@id":"https://codegalaxy.io","name":"CodeGalaxy","logo":{"@type":"ImageObject","url":"https://codegalaxy.io/app/assets/images/g_code.png","height":"513","width":"513"},"description":"Project aimed to provide new ways in learning programming languages and preparing for the interview."},"image":{"@type":"ImageObject","url":"https://codegalaxy.io/app/assets/images/fb/16x9/share-java-ru.png","height":"630","width":"1200"}},"image":{"@type":"ImageObject","url":"https://codegalaxy.io/app/assets/images/fb/16x9/share-java-ru.png","height":"630","width":"1200"},"answerCount":6,"potentialAction":[{"@type":"AssessAction","object":{"@type":"Question","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new"}},{"@type":"ChooseAction","actionOption":[{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","text":"5","dateCreated":"2020-02-06"},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18871","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18871","text":"12","dateCreated":"2020-02-06"},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18872","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18872","text":"0","dateCreated":"2020-02-06"},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18873","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18873","text":"Ошибка компиляции","dateCreated":"2020-02-06"},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18874","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18874","text":"Ошибка времени выполнения","dateCreated":"2020-02-06"}],"object":{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","text":"5","dateCreated":"2020-02-06"}}],"audience":{"@type":"EducationalAudience","audienceType":["developers","programmers"],"educationalRole":["Specialist","Student"],"alternateName":"Java Programmers","name":"Java Developers","sameAs":["https://en.wikipedia.org/wiki/Programmer","https://en.wikipedia.org/wiki/Software_developer","https://en.wikipedia.org/wiki/Software_engineer","https://en.wikipedia.org/wiki/Web_developer"]},"dateCreated":"2020-02-06","acceptedAnswer":[{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#js-expander-trigger","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#js-expander-trigger","text":"Инициализация статических полей осуществляется в том порядке, в котором они записаны.\u003cbr\u003e\nВ этом примере первым будет проинициализировано поле \u003ctt\u003einstance\u003c/tt\u003e, а уже затем - \u003ctt\u003eBASE\u003c/tt\u003e. Поэтому в момент вызова конструктора \u003ctt\u003eTasks()\u003c/tt\u003e поле \u003ctt\u003eBASE\u003c/tt\u003e ещё содержит 0.\u003cbr\u003e\nПоле \u003ctt\u003eDELTA\u003c/tt\u003e является \u003ci\u003eпеременной-константой\u003c/i\u003e, поэтому компилятор сразу подставляет в выражение вместо \u003ctt\u003eDELTA\u003c/tt\u003e его значение.\u003cbr\u003e\nВ итоге получаем: \u003ctt\u003ex \u003d 0 + 5;\u003c/tt\u003e\n","about":{"@type":"Question","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new"},"upvoteCount":1,"dateCreated":"2020-02-06"},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18870","text":"5","dateCreated":"2020-02-06","upvoteCount":1}],"suggestedAnswer":[{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18871","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18871","text":"12","dateCreated":"2020-02-06","upvoteCount":0},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18872","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18872","text":"0","dateCreated":"2020-02-06","upvoteCount":0},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18873","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18873","text":"Ошибка компиляции","dateCreated":"2020-02-06","upvoteCount":0},{"@type":"Answer","@id":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18874","url":"https://codegalaxy.io/courses/java-ru/questions/ef82e00183d14b7ebe31036c9235f770/chto-budet-vyvedeno-na-ekran-public-class-tasks-public-static-tasks-instance-new#18874","text":"Ошибка времени выполнения","dateCreated":"2020-02-06","upvoteCount":0}]}