{"id":14631,"date":"2022-10-08T14:28:04","date_gmt":"2022-10-08T08:58:04","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-does-java-sql-timestamp-extend-java-util-date\/"},"modified":"2022-10-08T14:28:04","modified_gmt":"2022-10-08T08:58:04","slug":"solved-why-does-java-sql-timestamp-extend-java-util-date","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-does-java-sql-timestamp-extend-java-util-date\/","title":{"rendered":"[Solved] Why does java.sql.Timestamp extend java.util.Date"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48132849\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48132849\" data-parentid=\"48075870\" data-score=\"3\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<h1>Instead, use java.time<\/h1>\n<p>As others stated:<\/p>\n<ul>\n<li>This class inheritance is poor design, a flawed hack.<\/li>\n<li>Now moot, as this class is now legacy, supplanted by <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/time\/Instant.html\"><code>java.time.Instant<\/code><\/a>.<\/li>\n<\/ul>\n<p>Avoid all the old legacy date-time classes found outside the java.time package. <\/p>\n<p>For databases, use a driver compliant with <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jcp.org\/en\/jsr\/detail?id=221\">JDBC 4.2 or later<\/a> to directly exchange java.time objects with your database. You can forget all about <code>java.sql.Timestamp<\/code>. <\/p>\n<p>Storing:<\/p>\n<pre><code>Instant instant = Instant.now() ;\nmyPreparedStatement.setObject( \u2026 , instant ) ;\n<\/code><\/pre>\n<p>Retrieving:<\/p>\n<pre><code>Instant instant = myResultSet.getObject( \u2026 , Instant.class ) ;\n<\/code><\/pre>\n<hr>\n<h1>About java.time<\/h1>\n<p>The <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/time\/package-summary.html\">java.time<\/a> framework is built into Java 8 and later. These classes supplant the troublesome old <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Legacy_system\">legacy<\/a> date-time classes such as <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/util\/Date.html\"><code>java.util.Date<\/code><\/a>, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/util\/Calendar.html\"><code>Calendar<\/code><\/a>, &amp; <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/text\/SimpleDateFormat.html\"><code>SimpleDateFormat<\/code><\/a>.<\/p>\n<p>The <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.joda.org\/joda-time\/\">Joda-Time<\/a> project, now in <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Maintenance_mode\">maintenance mode<\/a>, advises migration to the <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/docs.oracle.com\/javase\/9\/docs\/api\/java\/time\/package-summary.html\">java.time<\/a> classes.<\/p>\n<p>To learn more, see the <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/docs.oracle.com\/javase\/tutorial\/datetime\/TOC.html\">Oracle Tutorial<\/a>. And search Stack Overflow for many examples and explanations. Specification is <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jcp.org\/en\/jsr\/detail?id=310\">JSR 310<\/a>.<\/p>\n<p>Where to obtain the java.time classes? <\/p>\n<ul>\n<li><a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Java_version_history#Java_SE_8\"><strong>Java SE 8<\/strong><\/a>, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Java_version_history#Java_SE_9\"><strong>Java SE 9<\/strong><\/a>, and later\n<ul>\n<li>Built-in. <\/li>\n<li>Part of the standard Java API with a bundled implementation.<\/li>\n<li>Java 9 adds some minor features and fixes.<\/li>\n<\/ul>\n<\/li>\n<li><a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Java_version_history#Java_SE_6\"><strong>Java SE 6<\/strong><\/a> and <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Java_version_history#Java_SE_7\"><strong>Java SE 7<\/strong><\/a>\n<ul>\n<li>Much of the java.time functionality is back-ported to Java 6 &amp; 7 in <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threetenbp\/\"><strong><em>ThreeTen-Backport<\/em><\/strong><\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/en.wikipedia.org\/wiki\/Android_(operating_system)\"><strong>Android<\/strong><\/a>\n<ul>\n<li>The <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/github.com\/JakeWharton\/ThreeTenABP\"><strong><em>ThreeTenABP<\/em><\/strong><\/a> project adapts <em>ThreeTen-Backport<\/em> (mentioned above) for Android specifically.<\/li>\n<li>See <em>How to use ThreeTenABP\u2026<\/em>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>The <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threeten-extra\/\"><strong>ThreeTen-Extra<\/strong><\/a> project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threeten-extra\/apidocs\/org\/threeten\/extra\/Interval.html\"><code>Interval<\/code><\/a>, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threeten-extra\/apidocs\/org\/threeten\/extra\/YearWeek.html\"><code>YearWeek<\/code><\/a>, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threeten-extra\/apidocs\/org\/threeten\/extra\/YearQuarter.html\"><code>YearQuarter<\/code><\/a>, and <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.threeten.org\/threeten-extra\/apidocs\/index.html\">more<\/a>.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Why does java.sql.Timestamp extend java.util.Date <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Instead, use java.time As others stated: This class inheritance is poor design, a flawed hack. Now moot, as this class is now legacy, supplanted by java.time.Instant. Avoid all the old legacy date-time classes found outside the java.time package. For databases, use a driver compliant with JDBC 4.2 or later to directly exchange java.time objects &#8230; <a title=\"[Solved] Why does java.sql.Timestamp extend java.util.Date\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-why-does-java-sql-timestamp-extend-java-util-date\/\" aria-label=\"More on [Solved] Why does java.sql.Timestamp extend java.util.Date\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1961,323,3816,1182],"class_list":["post-14631","post","type-post","status-publish","format-standard","hentry","category-solved","tag-datetime-comparison","tag-java","tag-java-util-date","tag-timestamp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Why does java.sql.Timestamp extend java.util.Date - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-why-does-java-sql-timestamp-extend-java-util-date\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Why does java.sql.Timestamp extend java.util.Date - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Instead, use java.time As others stated: This class inheritance is poor design, a flawed hack. 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