{"id":1387,"date":"2022-11-01T23:02:32","date_gmt":"2022-11-01T15:02:32","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1387"},"modified":"2022-11-27T12:39:45","modified_gmt":"2022-11-27T04:39:45","slug":"java9%e4%b9%8b%e5%90%8e%e5%ba%9f%e5%bc%83newinstance%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1387","title":{"rendered":"JAVA9\u4e4b\u540e\u5e9f\u5f03newInstance()\u65b9\u6cd5"},"content":{"rendered":"\n<p>\u6839\u636eJAVA11\u7684API \u6211\u4eec\u53ef\u4ee5\u770b\u89c1\u53cd\u5c04\u4e2d\u7684newInstance\uff08\uff09\u65b9\u6cd5\u4e0d\u63a8\u8350\u4f7f\u7528\u4e86\uff0c\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>clazz.getDeclaredConstructor().newInstance()<\/code><\/pre>\n\n\n\n<p>\u4ee3\u66ff<\/p>\n\n\n\n<p>\u4f8b\u5982<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package reflect; import java.lang.reflect.InvocationTargetException; <em>\/**<\/em><em> * \u83b7\u53d6class\u5bf9\u8c61\u7684\u51e0\u79cd\u65b9\u6cd5<\/em><em> * \u5bf9\u8c61.get.class<\/em><em> * \u7c7b class<\/em><em> * Class.forName(\u5168\u9650\u5b9a\u7c7b\u540d)<\/em><em> *<\/em><em> *\/<\/em>public class Demo {    public static void main(String&#91;] args) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {        String string=\"abc\";        Class&lt;?&gt; class1=string.getClass();        class1=String.class;        try {            class1=Class.forName(\"java.lang.String\");        } catch (ClassNotFoundException e) {            <em>\/\/ TODO Auto-generated catch block<\/em>            e.printStackTrace();        }        System.out.println((String)class1.getDeclaredConstructor().newInstance());    } }<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6839\u636eJAVA11\u7684API \u6211\u4eec\u53ef\u4ee5\u770b\u89c1\u53cd\u5c04\u4e2d\u7684newInstance\uff08\uff09\u65b9\u6cd5\u4e0d\u63a8\u8350\u4f7f\u7528\u4e86\uff0c\u7528 \u4ee3\u66ff \u4f8b\u5982<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[46],"class_list":["post-1387","post","type-post","status-publish","format-standard","hentry","category-java-","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1387"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1387"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1387\/revisions"}],"predecessor-version":[{"id":1388,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1387\/revisions\/1388"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}