{"id":711,"date":"2022-10-06T22:49:17","date_gmt":"2022-10-06T14:49:17","guid":{"rendered":"https:\/\/qaqaq.top\/?p=711"},"modified":"2022-11-27T12:39:56","modified_gmt":"2022-11-27T04:39:56","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b8%ad-%e7%bb%a7%e6%89%bf%e5%92%8csuper%e8%af%be%e5%90%8e%e7%bb%83%e4%b9%a0-%e5%a4%8d%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=711","title":{"rendered":"\u9762\u5411\u5bf9\u8c61(\u4e2d)-\u7ee7\u627f\u548csuper\u8bfe\u540e\u7ec3\u4e60 \u590d\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P279.exer;\r\n\r\npublic class Account {\r\n\r\n\tprivate int id; \/\/ \u8d26\u53f7\r\n\tprivate double balance; \/\/ \u4f59\u989d\r\n\tprivate double annuallntertstRate; \/\/ \u5e74\u5229\u7387\r\n\r\n\tpublic Account(int id, double balance, double annuallntertstRate) {\r\n\t\tsuper();\r\n\t\tthis.id = id;\r\n\t\tthis.balance = balance;\r\n\t\tthis.annuallntertstRate = annuallntertstRate;\r\n\t}\r\n\r\n\tpublic int getId() {\r\n\t\treturn id;\r\n\t}\r\n\r\n\tpublic void setId(int id) {\r\n\t\tthis.id = id;\r\n\t}\r\n\r\n\tpublic double getBalance() {\r\n\t\treturn balance;\r\n\t}\r\n\r\n\tpublic void setBalance(double balance) {\r\n\t\tthis.balance = balance;\r\n\t}\r\n\r\n\tpublic double getAnnuallntertstRate() {\r\n\t\treturn annuallntertstRate;\r\n\t}\r\n\r\n\tpublic void setAnnuallntertstRate(double annuallntertstRate) {\r\n\t\tthis.annuallntertstRate = annuallntertstRate;\r\n\t}\r\n\t\r\n\t\/\/\u6708\u5229\u7387\r\n\tpublic double getMonthlyInterest() {\r\n\t\treturn annuallntertstRate \/ 12;\r\n\t}\r\n\t\r\n\t\/\/\u53d6\u6b3e\r\n\tpublic void withdraw(double amount) {\r\n\t\tif(balance >= amount) {\r\n\t\t\tbalance -= amount;\r\n\t\t\treturn;\r\n\t\t}\r\n\t\t\r\n\t\tSystem.out.println(\"\u4f59\u989d\u4e0d\u8db3\uff01\");\r\n\t}\r\n\t\r\n\t\/\/\u5b58\u6b3e\r\n\tpublic void deposit(double amount) {\r\n\t\tif(amount > 0) {\r\n\t\t\tbalance += amount;\r\n\t\t\treturn;\r\n\t\t}\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P279.exer;\r\n\r\npublic class AccountTest {\r\n\t\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\r\n\t\tAccount acct = new Account(1122, 20000, 0.045);\r\n\t\t\r\n\t\tacct.withdraw(30000);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\u4e3a\uff1a\" + acct.getBalance());\r\n\t\tacct.withdraw(2500);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\u4e3a\uff1a\" + acct.getBalance());\r\n\t\tacct.deposit(3000);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\u4e3a\uff1a\" + acct.getBalance());\r\n\t\tSystem.out.println(\"\u6708\u5229\u7387\u4e3a\uff1a\" + acct.getMonthlyInterest());\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P279.exer;\r\n\r\npublic class CheckAccount extends Account {\r\n\r\n\tprivate double overdraft;\/\/ \u53ef\u900f\u652f\u9650\u989d\r\n\r\n\tpublic CheckAccount(int id, double balance, double annuallntertstRate, double overdraft) {\r\n\t\tsuper(id, balance, annuallntertstRate);\r\n\t\tthis.overdraft = overdraft;\r\n\t}\r\n\r\n\tpublic double getOverdraft() {\r\n\t\treturn overdraft;\r\n\t}\r\n\r\n\tpublic void setOverdraft(double overdraft) {\r\n\t\tthis.overdraft = overdraft;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic void withdraw(double amount) {\r\n\t\tif(getBalance() >= amount) {\r\n\/\/\t\t\tsetBalance(getBalance() - amount);\r\n\t\t\tsuper.withdraw(amount);\r\n\t\t}else if(overdraft >= amount - getBalance()) {\r\n\t\t\toverdraft -= (amount - getBalance());\r\n\/\/\t\t\tsetBalance(0);\r\n\t\t\tsuper.withdraw(getBalance());\r\n\t\t}else {\r\n\t\t\tSystem.out.println(\"\u8d85\u8fc7\u53ef\u900f\u652f\u9650\u989d\uff01\");\r\n\t\t}\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P279.exer;\r\n\r\npublic class CheckAccountTest {\r\n\t\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\r\n\t\tCheckAccount acct = new CheckAccount(1122, 20000, 0.045, 5000);\r\n\t\t\r\n\t\tacct.withdraw(5000);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\uff1a\" + acct.getBalance());\r\n\t\tSystem.out.println(\"\u60a8\u7684\u53ef\u900f\u652f\u989d\uff1a\" + acct.getOverdraft());\r\n\t\tacct.withdraw(18000);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\uff1a\" + acct.getBalance());\r\n\t\tSystem.out.println(\"\u60a8\u7684\u53ef\u900f\u652f\u989d\uff1a\" + acct.getOverdraft());\r\n\t\tacct.withdraw(3000);\r\n\t\tSystem.out.println(\"\u60a8\u7684\u8d26\u6237\u4f59\u989d\uff1a\" + acct.getBalance());\r\n\t\tSystem.out.println(\"\u60a8\u7684\u53ef\u900f\u652f\u989d\uff1a\" + acct.getOverdraft());\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[46],"class_list":["post-711","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\/711"}],"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=711"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions"}],"predecessor-version":[{"id":712,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions\/712"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}