{"id":7180,"date":"2024-04-12T21:01:01","date_gmt":"2024-04-12T13:01:01","guid":{"rendered":""},"modified":"2024-04-12T21:01:01","modified_gmt":"2024-04-12T13:01:01","slug":"\u7b2c\u4e5d\u7ae0\u7b2c\u4e8c\u9898\uff08Stock\u7c7b\uff09\uff08Stoke class\uff09","status":"publish","type":"post","link":"https:\/\/mushiming.com\/7180.html","title":{"rendered":"\u7b2c\u4e5d\u7ae0\u7b2c\u4e8c\u9898\uff08Stock\u7c7b\uff09\uff08Stoke class\uff09"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<h2>\u7b2c\u4e5d\u7ae0\u7b2c\u4e8c\u9898\uff08Stock\u7c7b\uff09\uff08Stoke class\uff09<\/h2>\n<ul>\n<li>\n<p>9.2\uff08Stock\u7c7b\uff09\u9075\u71679.2\u8282\u4e2dCircle\u7c7b\u7684\u4f8b\u5b50\uff0c\u8bbe\u8ba1\u4e00\u4e2a\u540d\u4e3aStoke\u7684\u7c7b\u3002\u8fd9\u4e2a\u7c7b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4e00\u4e2a\u540d\u4e3asymbol\u7684\u5b57\u7b26\u4e32\u6570\u636e\u57df\u8868\u793a\u80a1\u7968\u4ee3\u7801\u3002<\/li>\n<li>\u4e00\u4e2a\u540d\u4e3aname\u7684\u5b57\u7b26\u4e32\u6570\u636e\u57df\u8868\u793a\u80a1\u7968\u540d\u5b57\u3002<\/li>\n<li>\u4e00\u4e2a\u540d\u4e3apreviousClosingPrice\u7684double\u7c7b\u578b\u6570\u636e\u57df\uff0c\u4ed6\u5b58\u50a8\u7684\u662f\u524d\u4e00\u65e5\u7684\u80a1\u7968\u503c\u3002<\/li>\n<li>\u4e00\u4e2a\u540d\u4e3acurrentPrice\u7684double\u7c7b\u578b\u6570\u636e\u57df\uff0c\u4ed6\u5b58\u50a8\u7684\u662f\u5f53\u65f6\u7684\u80a1\u7968\u503c\u3002<\/li>\n<li>\u4e00\u4e2a\u521b\u5efa\u4e00\u53ea\u53ea\u6709\u7279\u5b9a\u4ee3\u7801\u548c\u540d\u5b57\u7684\u80a1\u7968\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n<li>\u4e00\u4e2a\u540d\u4e3agetChangePercent\uff08\uff09\u7684\u65b9\u6cd5\uff0c\u53d1\u6325\u4ecepreviousClosingPrice\u5230currentPrice\u53d8\u5316\u7684\u767e\u5206\u6bd4\u3002<\/li>\n<\/ul>\n<p>\u753b\u51fa\u8be5\u7c7b\u7684UML\u56fe\u5e76\u5b9e\u73b0\u8fd9\u4e2a\u7c7b\u3002\u7f16\u5199\u4e00\u4e2a\u6d4b\u8bd5\u7a0b\u5e8f\uff0c\u521b\u5efa\u4e00\u4e2aStoke\u5bf9\u8c61\uff0c\u4ed6\u7684\u80a1\u7968\u4ee3\u7801\u662fORCL\uff0c\u80a1\u7968\u7684\u540d\u5b57\u4e3aOracle Corporation\uff0c\u524d\u4e00\u65e5\u6536\u76d8\u4ef7\u662f34.5\u3002\u8bbe\u7f6e\u65b0\u7684\u5f53\u524d\u503c\u4e3a34.35\uff0c\u7136\u540e\u663e\u793a\u5e02\u503c\u53d8\u5316\u7684\u767e\u5206\u6bd4\u3002<br \/> 9.2\uff08Stoke class\uff09Follow the example of the circle class in Section 9.2 to design a class called stoke. This class includes:<\/p>\n<ul>\n<li>A string data field named symbol represents the stock code.<\/li>\n<li>A string data field named name represents the stock name.<\/li>\n<li>A double type data field called previous closing price stores the stock value of the previous day.<\/li>\n<li>A double type data field called currentprice stores the current stock value.<\/li>\n<li>A constructor that creates a stock with a specific code and name.<\/li>\n<li>A method called getchangepercent() plays the percentage of change from previous closing price to current price.<\/li>\n<\/ul>\n<p>Draw the UML diagram of the class and implement the class. Write a test program, create a stoke object, his stock code is orcl, the name of the stock is Oracle Corporation, the previous day\u2019s closing price was 34.5. Set the new current value to 34.35, and then display the percentage of market value change.<\/p>\n<\/li>\n<li>\n<p>\u53c2\u8003\u4ee3\u7801\uff1a<\/p>\n<\/li>\n<\/ul>\n<pre><code class=\"prism language-java\"><span class=\"token keyword\">package<\/span> chapter09<span class=\"token punctuation\">;<\/span>\n\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Code_02<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span>String<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        Stock stock <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Stock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"ORCL\"<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">\"Oracle Corporation\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        System<span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"The change percent is: \"<\/span> <span class=\"token operator\">+<\/span> stock<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChangePercent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">34.5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">34.35<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Stock<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">private<\/span> String symbol<span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">private<\/span> String name<span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">double<\/span> preciousClosingPrice<span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">double<\/span> currentPrice<span class=\"token punctuation\">;<\/span>\n    <span class=\"token function\">Stock<\/span><span class=\"token punctuation\">(<\/span>String newSymbol<span class=\"token punctuation\">,<\/span>String newName<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> newName<span class=\"token punctuation\">;<\/span>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>symbol <span class=\"token operator\">=<\/span> newSymbol<span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">public<\/span> String <span class=\"token function\">getChangePercent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> preciousClosingPrice<span class=\"token punctuation\">,<\/span><span class=\"token keyword\">double<\/span> currentPrice<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>currentPrice <span class=\"token operator\">-<\/span> preciousClosingPrice<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span>preciousClosingPrice <span class=\"token operator\">*<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">+<\/span> <span class=\"token string\">\"%\"<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n\n<\/code><\/pre>\n<ul>\n<li>\u7ed3\u679c\u663e\u793a\uff1a<\/li>\n<\/ul>\n<pre class=\"language-java prettyprint linenums\"><code class=\"prism language-java\">The change percent is<span class=\"token operator\">:<\/span> <span class=\"token operator\">-<\/span><span class=\"token number\">4.347826086956481E-5<\/span><span class=\"token operator\">%<\/span>\n\nProcess finished with exit code <span class=\"token number\">0<\/span>\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u7b2c\u4e5d\u7ae0\u7b2c\u4e8c\u9898\uff08Stock\u7c7b\uff09\uff08Stoke class\uff09\u7b2c\u4e5d\u7ae0\u7b2c\u4e8c\u9898\uff08Stock\u7c7b\uff09\uff08Stokeclass\uff099.2\uff08Stock\u7c7b\uff09\u9075\u71679.2\u8282\u4e2dCircle\u7c7b\u7684\u4f8b\u5b50\uff0c...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/7180"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=7180"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/7180\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=7180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=7180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=7180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}