{"id":5694,"date":"2026-09-23T09:00:00","date_gmt":"2026-09-23T09:00:00","guid":{"rendered":"https:\/\/otus.ru\/journal\/?p=5694"},"modified":"2026-09-25T15:34:17","modified_gmt":"2026-09-25T15:34:17","slug":"annotacii-v-java-i-override","status":"publish","type":"post","link":"https:\/\/otus.ru\/journal\/annotacii-v-java-i-override\/","title":{"rendered":"\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438 \u0432 Java: @Override, \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0435 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438 \u0438 \u043a\u0430\u043a \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u0432\u043e\u044e"},"content":{"rendered":"

\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f \u0432 Java<\/strong> — \u044d\u0442\u043e \u043c\u0435\u0442\u0430\u0434\u0430\u043d\u043d\u044b\u0435, \u043f\u0440\u0438\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u043d\u044b\u0435 \u043a \u043e\u0431\u044a\u044f\u0432\u043b\u0435\u043d\u0438\u044e (\u043a\u043b\u0430\u0441\u0441\u0443, \u043c\u0435\u0442\u043e\u0434\u0443, \u043f\u043e\u043b\u044e, \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0443, \u043f\u0430\u043a\u0435\u0442\u0443 \u0438 \u0442. \u0434.) \u0432 \u0444\u043e\u0440\u043c\u0435 @\u0418\u043c\u044f<\/code> \u0438\u043b\u0438 @\u0418\u043c\u044f(\u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b)<\/code>. \u0421\u0430\u043c\u0430 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442: \u0441\u043c\u044b\u0441\u043b \u0435\u0439 \u043f\u0440\u0438\u0434\u0430\u0435\u0442 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0435\u0435 \u0447\u0438\u0442\u0430\u0435\u0442, — \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440, \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0439 \u043f\u0440\u0438 \u0441\u0431\u043e\u0440\u043a\u0435 \u0438\u043b\u0438 \u043a\u043e\u0434 \u0447\u0435\u0440\u0435\u0437 \u0440\u0435\u0444\u043b\u0435\u043a\u0441\u0438\u044e \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b.<\/p>\n

\n

\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/strong><\/p>\n

    \n
  1. \u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f, Javadoc-\u0442\u0435\u0433 \u0438 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 — \u043d\u0435 \u043e\u0434\u043d\u043e \u0438 \u0442\u043e \u0436\u0435<\/a><\/li>\n
  2. @Override: \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 \u043e\u0448\u0438\u0431\u043a\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043e\u043d \u043b\u043e\u0432\u0438\u0442<\/a><\/li>\n
  3. \u0412\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0435 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438 Java<\/a><\/li>\n
  4. \u041c\u0435\u0442\u0430-\u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438: @Retention \u0438 @Target<\/a><\/li>\n
  5. \u0421\u0432\u043e\u044f \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f \u0438 \u0447\u0442\u0435\u043d\u0438\u0435 \u0447\u0435\u0440\u0435\u0437 \u0440\u0435\u0444\u043b\u0435\u043a\u0441\u0438\u044e<\/a><\/li>\n
  6. \u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438 \u0432 \u0442\u0435\u0441\u0442\u0430\u0445: JUnit 4 \u0438 JUnit Jupiter<\/a><\/li>\n
  7. \u0412\u044b\u0432\u043e\u0434\u044b<\/a><\/li>\n
  8. \u0413\u0434\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \/ \u0441\u0432\u044f\u0437\u044c \u0441 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u043e\u0439<\/a><\/li>\n
  9. FAQ<\/a><\/li>\n<\/ol>\n<\/div>\n

    \u041d\u0438\u0436\u0435 — \u043a\u0430\u043a @Override<\/code> \u043b\u043e\u0432\u0438\u0442 \u0442\u0438\u0445\u0443\u044e \u043e\u0448\u0438\u0431\u043a\u0443, \u043a\u0430\u043a\u0438\u0435 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438 \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u044b \u0432 \u044f\u0437\u044b\u043a, \u0447\u0442\u043e \u0434\u0435\u043b\u0430\u044e\u0442 @Retention<\/code> \u0438 @Target<\/code> \u0438 \u043a\u0430\u043a \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0438 \u043f\u0440\u043e\u0447\u0438\u0442\u0430\u0442\u044c \u0441\u0432\u043e\u044e \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044e. \u0412\u0441\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u044b \u043f\u0440\u043e\u0432\u0435\u0440\u0435\u043d\u044b \u043d\u0430 OpenJDK 25.0.4 (Java 25 LTS) 23.09.2026.<\/p>\n

    \u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f, Javadoc-\u0442\u0435\u0433 \u0438 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 — \u043d\u0435 \u043e\u0434\u043d\u043e \u0438 \u0442\u043e \u0436\u0435<\/h2>\n\n\n\n\n\n\n\n
    \u0427\u0442\u043e<\/th>\n\u041f\u0440\u0438\u043c\u0435\u0440<\/th>\n\u041a\u0442\u043e \u0447\u0438\u0442\u0430\u0435\u0442<\/th>\n\u0412\u043b\u0438\u044f\u0435\u0442 \u043d\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044e<\/th>\n<\/tr>\n<\/thead>\n
    \u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f<\/td>\n@Override<\/code>, @Deprecated<\/code><\/td>\n\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440, \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b, \u0440\u0435\u0444\u043b\u0435\u043a\u0441\u0438\u044f<\/td>\n\u0434\u0430, \u043c\u043e\u0436\u0435\u0442 \u0434\u0430\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0443 \u0438\u043b\u0438 \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435<\/td>\n<\/tr>\n
    Javadoc-\u0442\u0435\u0433<\/td>\n@author<\/code>, @param<\/code>, @deprecated<\/code> \u0432\u043d\u0443\u0442\u0440\u0438 \/** ... *\/<\/code><\/td>\n\u0443\u0442\u0438\u043b\u0438\u0442\u0430 javadoc<\/td>\n\u043d\u0435\u0442<\/td>\n<\/tr>\n
    \u041a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439<\/td>\n\/\/ \u043f\u0435\u0440\u0435\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u043c<\/code><\/td>\n\u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0435\u043b\u043e\u0432\u0435\u043a<\/td>\n\u043d\u0435\u0442<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    @author<\/code> \u0438 @param<\/code> — \u043d\u0435 \u0430\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u0438, \u0430 Javadoc-\u0442\u0435\u0433\u0438 \u0432\u043d\u0443\u0442\u0440\u0438 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u0438. \u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f @Deprecated<\/code> (\u0441 \u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0431\u0443\u043a\u0432\u044b) \u0438 \u0442\u0435\u0433 @deprecated<\/code> (\u0441 \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u043e\u0439) — \u0442\u043e\u0436\u0435 \u0440\u0430\u0437\u043d\u044b\u0435 \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u0438, \u0438\u0445 \u043e\u0431\u044b\u0447\u043d\u043e \u0441\u0442\u0430\u0432\u044f\u0442 \u0432\u043c\u0435\u0441\u0442\u0435.<\/p>\n

    @Override: \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 \u043e\u0448\u0438\u0431\u043a\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043e\u043d \u043b\u043e\u0432\u0438\u0442<\/h2>\n

    \u041a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430: \u0432 equals<\/code> \u043d\u0430\u043f\u0438\u0441\u0430\u043b\u0438 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 Point<\/code> \u0432\u043c\u0435\u0441\u0442\u043e Object<\/code>. \u042d\u0442\u043e \u043d\u0435 \u043f\u0435\u0440\u0435\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435, \u0430 \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0437\u043a\u0430 — \u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0440\u044f\u0434\u043e\u043c \u0441\u043e \u0441\u0442\u0430\u0440\u044b\u043c.<\/p>\n

    public<\/span> <\/span>class<\/span> Point<\/span> {<\/span>\n    <\/span>private<\/span> <\/span>final<\/span> <\/span>int<\/span> <\/span>x<\/span>, <\/span>y<\/span>;<\/span>\n\n    <\/span>public<\/span> <\/span>Point<\/span>(<\/span>int<\/span> <\/span>x<\/span>, <\/span>int<\/span> <\/span>y<\/span>) { <\/span>this<\/span>.<\/span>x<\/span> <\/span>=<\/span> <\/span>x<\/span>; <\/span>this<\/span>.<\/span>y<\/span> <\/span>=<\/span> <\/span>y<\/span>; }<\/span>\n\n    <\/span>\/\/ \u041e\u0448\u0438\u0431\u043a\u0430: \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 Point, \u0430 \u043d\u0435 Object - \u044d\u0442\u043e \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0437\u043a\u0430, \u043d\u0435 \u043f\u0435\u0440\u0435\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435<\/span>\n    <\/span>public<\/span> <\/span>boolean<\/span> <\/span>equals<\/span>(<\/span>Point<\/span> <\/span>other<\/span>) {<\/span>\n        <\/span>return<\/span> <\/span>other<\/span> <\/span>!=<\/span> <\/span>null<\/span> <\/span>&&<\/span> <\/span>x<\/span> <\/span>==<\/span> <\/span>other<\/span>.<\/span>x<\/span> <\/span>&&<\/span> <\/span>y<\/span> <\/span>==<\/span> <\/span>other<\/span>.<\/span>y<\/span>;<\/span>\n    }<\/span>\n\n    <\/span>public<\/span> <\/span>static<\/span> <\/span>void<\/span> <\/span>main<\/span>(<\/span>String<\/span>[]<\/span> <\/span>args<\/span>) {<\/span>\n        <\/span>Object<\/span> <\/span>a<\/span> <\/span>=<\/span> <\/span>new<\/span> <\/span>Point<\/span>(<\/span>1<\/span>, <\/span>2<\/span>);<\/span>\n        <\/span>Object<\/span> <\/span>b<\/span> <\/span>=<\/span> <\/span>new<\/span> <\/span>Point<\/span>(<\/span>1<\/span>, <\/span>2<\/span>);<\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>a<\/span>.<\/span>equals<\/span>(<\/span>b<\/span>));<\/span>\n        <\/span>System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>java<\/span>.<\/span>util<\/span>.<\/span>Set<\/span>.<\/span>of<\/span>(<\/span>a<\/span>).<\/span>contains<\/span>(<\/span>b<\/span>));<\/span>\n    }<\/span>\n}<\/span><\/code><\/pre>\n
    \u041a\u043e\u0434 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0431\u0435\u0437 \u0435\u0434\u0438\u043d\u043e\u0433\u043e \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044f, \u0430 java Point.java<\/code> \u043f\u0435\u0447\u0430\u0442\u0430\u0435\u0442:<\/p>\n
    false\nfalse\n<\/code><\/pre>\n
    \u0414\u043b\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0442\u0438\u043f\u0430 Object<\/code> \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f Object.equals(Object)<\/code>, \u0441\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0441\u0441\u044b\u043b\u043a\u0438, — \u043d\u0430\u0448 \u043c\u0435\u0442\u043e\u0434 \u043d\u0435 \u0443\u0447\u0430\u0441\u0442\u0432\u0443\u0435\u0442. \u0422\u0435\u043f\u0435\u0440\u044c \u0434\u043e\u0431\u0430\u0432\u0438\u043c @Override<\/code> \u043a \u0442\u043e\u043c\u0443 \u0436\u0435 \u043c\u0435\u0442\u043e\u0434\u0443:<\/p>\n
        <\/span>@Override<\/span>\n    <\/span>public<\/span> <\/span>boolean<\/span> <\/span>equals<\/span>(<\/span>Point<\/span> <\/span>other<\/span>) {<\/span>\n        <\/span>return<\/span> <\/span>other<\/span> <\/span>!=<\/span> <\/span>null<\/span> <\/span>&&<\/span> <\/span>x<\/span> <\/span>==<\/span> <\/span>other<\/span>.<\/span>x<\/span> <\/span>&&<\/span> <\/span>y<\/span> <\/span>==<\/span> <\/span>other<\/span>.<\/span>y<\/span>;<\/span>\n    }<\/span><\/code><\/pre>\n
    \u041a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u043e\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442 \u0441\u0431\u043e\u0440\u043a\u0443:<\/p>\n
    Point.java:6: error: method does not override or implement a method from a supertype\n    @Override\n    ^\n1 error\n<\/code><\/pre>\n
    \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 — \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430\u044f \u0441\u0438\u0433\u043d\u0430\u0442\u0443\u0440\u0430 \u0438 \u043f\u0430\u0440\u043d\u044b\u0439 hashCode<\/code>, \u0447\u0442\u043e\u0431\u044b \u043e\u0431\u044a\u0435\u043a\u0442 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u043b \u0432 HashSet<\/code> \u0438 HashMap<\/code>:<\/p>\n
    @Override<\/span>\npublic<\/span> <\/span>boolean<\/span> <\/span>equals<\/span>(<\/span>Object<\/span> <\/span>o<\/span>) {<\/span>\n    <\/span>return<\/span> <\/span>o<\/span> <\/span>instanceof<\/span> <\/span>Point<\/span> <\/span>p<\/span> <\/span>&&<\/span> <\/span>x<\/span> <\/span>==<\/span> <\/span>p<\/span>.<\/span>x<\/span> <\/span>&&<\/span> <\/span>y<\/span> <\/span>==<\/span> <\/span>p<\/span>.<\/span>y<\/span>;<\/span>\n}<\/span>\n\n@Override<\/span>\npublic<\/span> <\/span>int<\/span> <\/span>hashCode<\/span>() {<\/span>\n    <\/span>return<\/span> <\/span>java<\/span>.<\/span>util<\/span>.<\/span>Objects<\/span>.<\/span>hash<\/span>(<\/span>x<\/span>, <\/span>y<\/span>);<\/span>\n}<\/span><\/code><\/pre>\n
    \u0422\u043e\u0442 \u0436\u0435 main<\/code> \u0442\u0435\u043f\u0435\u0440\u044c \u043f\u0435\u0447\u0430\u0442\u0430\u0435\u0442 true<\/code> \u0438 true<\/code>.<\/p>\n
    \u0427\u0442\u043e \u0432\u0430\u0436\u043d\u043e \u0437\u043d\u0430\u0442\u044c \u043f\u0440\u043e @Override<\/h3>\n