{"id":18,"date":"2021-08-11T15:43:41","date_gmt":"2021-08-11T07:43:41","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/javav2\/?p=18"},"modified":"2021-08-17T16:04:14","modified_gmt":"2021-08-17T08:04:14","slug":"java%e7%9a%84float%e6%98%af%e4%b8%80%e4%b8%aa%e5%a4%a7%e7%ba%a6%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/javav2\/post-18.html","title":{"rendered":"java\u7684float\u662f\u4e00\u4e2a\u5927\u7ea6\u6570"},"content":{"rendered":"\n<p>java\u7684float\u662f\u4e00\u4e2a\u5927\u7ea6\u6570\uff0c\u5728float\u8fdb\u884c\u6bd4\u8f83\u65f6\uff0c\u5f80\u5f80\u4f1a\u51fa\u73b0\u4e00\u4e9b\u51fa\u4e4e\u610f\u6599\u7684\u7ed3\u679c<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5728\u4e0b\u9762\u7684\u7a0b\u5e8f\u4e2d\uff0c\u867d\u7136f1\u5e76\u4e0d\u7b49\u4e8ef2\uff0c\u4f46\u8f93\u51fa\u662ftrue\uff0c\u56e0\u4e3af1\u8db3\u591f\u5927\u7ea6\u7b49\u4e8ef1-1\u3002\u800cf3\u8d4b\u503c0.3\uff0c\u5374\u4e0d\u7b49\u4e8e0.3\uff0c\u56e0\u4e3a0.3\u53d6float\u7cbe\u5ea6\u4e22\u5931\u592a\u591a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    public static void main(String&#91;] arg) {\n        float f1 = 8748787848788F;\n        float f2 = f1 - 1;\n        System.out.println(f1 == f2);  \/\/ true\n\n        float f3 = 0.3f;\n\n        System.out.println(f3==0.3);  \/\/ false\n    }<\/code><\/pre>\n\n\n\n<p>\u867d\u7136double\u4e5f\u662f\u6d6e\u70b9\u6570\uff0c\u4f46\u5e76\u4e0d\u4f1a\u51fa\u73b0\u4e0a\u9762\u7684\u60c5\u51b5\uff0cfloat\u4e0d\u7cbe\u786e\uff0cdouble\u7cbe\u786e\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\uff0c\u82e5\u6d6e\u70b9\u6570\u4e2d\uff0c\u5c0f\u6570\u90e8\u5206\u4e3a0\u65f6\uff0c\u6216\u5176\u4ed6\u4e0d\u4e22\u7cbe\u5ea6\u7684\uff0cfloat\u53c8\u662f\u7cbe\u786e\u7684\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>        double d1=1.0d;\n        float d2=1.0f;\n        System.out.println(\"d1==d2 \"+(d1==d2));  \/\/ true<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>java\u7684float\u662f\u4e00\u4e2a\u5927\u7ea6\u6570\uff0c\u5728float\u8fdb\u884c\u6bd4\u8f83\u65f6\uff0c\u5f80\u5f80\u4f1a\u51fa\u73b0\u4e00\u4e9b\u51fa\u4e4e\u610f\u6599\u7684\u7ed3\u679c \u4f8b\u5982\uff0c\u5728\u4e0b\u9762\u7684\u7a0b\u5e8f\u4e2d\uff0c&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/javav2\/post-18.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">java\u7684float\u662f\u4e00\u4e2a\u5927\u7ea6\u6570<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/18"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/comments?post=18"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/18\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/media?parent=18"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/categories?post=18"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/tags?post=18"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}