{"id":588,"date":"2017-02-24T09:46:42","date_gmt":"2017-02-24T01:46:42","guid":{"rendered":"http:\/\/www.rainweb.site\/?p=588"},"modified":"2023-08-07T20:57:28","modified_gmt":"2023-08-07T12:57:28","slug":"java-article62","status":"publish","type":"post","link":"http:\/\/rain1024.com\/index.php\/2017\/02\/24\/java-article62\/","title":{"rendered":"Java\u4e2d\u7ebf\u7a0b\u540c\u6b65\u7684\u4e24\u79cd\u65b9\u5f0f"},"content":{"rendered":"<p>Java\u4e2d\u7ebf\u7a0b\u540c\u6b65\u7684\u4e24\u79cd\u65b9\u5f0f<\/p>\n<h2>\u5728\u591a\u7ebf\u7a0b\u4e2d\uff0c\u9700\u8981\u63a7\u5236\u7ebf\u7a0b\u7684\u8bbf\u95ee\u6b21\u6570\uff0c\u9891\u7387\u548c\u4f18\u5148\u7ea7\u3002\u6bd4\u5982\u5728\u53d6\u94b1\u65f6\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u4fee\u6539\u4e86\u8d26\u6237\u4f59\u989d\uff0c\u5c31\u4f1a\u51fa\u73b0\u540c\u6b65\u9519\u8bef\uff0c\u6240\u4ee5Java\u4e2d\u63d0\u4f9b\u4e86\u7ebf\u7a0b\u540c\u6b65\u7684\u6982\u5ff5\u4ee5\u4fdd\u8bc1\u67d0\u4e2a\u8d44\u6e90\u5728\u67d0\u4e00\u65f6\u523b\u53ea\u80fd\u7531\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\uff0c\u4fdd\u8bc1\u5171\u4eab\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002<\/h2>\n<h2>\u4e0b\u9762\u662f\u4e00\u4e2a\u6a21\u62df\u591a\u7ebf\u7a0b\u5b58\u53d6\u94b1\u65f6\u7684\u64cd\u4f5c\u3002<\/h2>\n<p>BankAccount.java<\/p>\n<pre><code class=\"java\">package com.rain.demo;\n\/**\n * Created by w-pc on 2017\/02\/24.\n *\n * \u6a21\u62df\u94f6\u884c\u8d26\u6237\n * *\/\npublic class BankAccount {\n    \/\/\u94f6\u884c\u8d26\u6237\n    private String bankNo;\n    \/\/\u94f6\u884c\u4f59\u989d\n    private double balance;\n    public BankAccount(String bankNo,double balance) {\n        this.bankNo = bankNo;\n        this.balance = balance;\n    }\n    public void setBankNo(String bankNo) {\n        this.bankNo = bankNo;\n    }\n    public void setBalance(double balance) {\n        this.balance = balance;\n    }\n    public double getBalance() {\n        return balance;\n    }\n    public String getBankNo() {\n        return bankNo;\n    }\n}\n<\/code><\/pre>\n<p>NoSynBank.java<\/p>\n<pre><code class=\"java\">package com.rain.demo;\n\/**\n * Created by w-pc on 2017\/02\/24.\n *\/\npublic class NoSynBank extends Thread{\n    private BankAccount account;\n    private double money;\n    public NoSynBank(String name,BankAccount account,double money){\n        super(name);\n        this.account = account;\n        this.money = money;\n    }\n    public void run(){\n        \/\/\u83b7\u53d6\u5f53\u524d\u91d1\u989d\n        double d = this.account.getBalance();\n        \/\/\u5224\u65ad\u5b58\u53d6\u91d1\u989d\u662f\u5426\u5927\u4e8e\u4f59\u989d\n        if(money&lt;0 &amp;&amp; d - money &lt; 0){\n            System.out.println(\"\u64cd\u4f5c\u5931\u8d25\");\n            return ;\n        }else{\n            d += money;\n            System.out.println(this.getName()+\"\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a\"+d);\n            \/\/\u8bbe\u5b9a\u4f11\u7720\u4e00\u6beb\u79d2\uff0c\u4f7f\u5176\u4ed6\u7ebf\u7a0b\u5f97\u4ee5\u6267\u884c\n            try {\n                Thread.sleep(1);\n            }catch (InterruptedException e){\n                e.printStackTrace();\n            }\n            this.account.setBalance(d);\n        }\n    }\n    public static void main(String[] args) {\n        \/\/\u5b9e\u4f8b\u5316\u4e00\u4e2a\u8d26\u6237\n        BankAccount myAccount = new BankAccount(\"60001002\",5000);\n        NoSynBank t1 = new NoSynBank(\"T001\",myAccount,-3000);\n        NoSynBank t2 = new NoSynBank(\"T002\", myAccount, -3000);\n        NoSynBank t3 = new NoSynBank(\"T003\",myAccount,1000);\n        NoSynBank t4 = new NoSynBank(\"T004\",myAccount,-2000);\n        NoSynBank t5 = new NoSynBank(\"T005\",myAccount,2000);\n        \/\/\u5c06\u7ebf\u7a0b\u5168\u90e8\u542f\u52a8\n        t1.start();\n        t2.start();\n        t3.start();\n        t4.start();\n        t5.start();\n        \/\/\u4f7f\u7528join\u65b9\u6cd5\u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\n        try {\n            t1.join();\n            t2.join();\n            t3.join();\n            t4.join();\n            t5.join();\n        }catch (InterruptedException e){\n            e.printStackTrace();\n        }\n        \/\/\u6253\u5370\u51fa\u5f53\u524d\u8d26\u6237\u7684\u4f59\u989d\n        System.out.println(\"\u8d26\u6237\uff1a\"+myAccount.getBankNo()+\",\u4f59\u989d\uff1a\"+myAccount.getBalance());\n    }\n}\n<\/code><\/pre>\n<pre><code class=\"java\"><br \/>\u8fd0\u884c\u7ed3\u679c\uff1a\nT002\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a2000.0\nT003\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a6000.0\nT001\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a2000.0\nT004\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a3000.0\nT005\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a7000.0\n\u8d26\u6237\uff1a60001002,\u4f59\u989d\uff1a7000.0\n<\/code><\/pre>\n<h2>\u901a\u8fc7\u8fd0\u884c\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u4f59\u989d\u53d1\u751f\u9519\u8bef\uff0c\u6709\u65f6\u8fd0\u884c\u4e5f\u53ef\u80fd\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u6ca1\u51fa\u73b0\u95ee\u9898\u4e0d\u7b49\u4e8e\u6ca1\u6709\u95ee\u9898\uff0c\u53ea\u8981\u51fa\u73b0\u4e00\u4e2a\u9519\u8bef\uff0c\u90a3\u5c31\u662f\u7f16\u7a0b\u95ee\u9898\u3002<\/h2>\n<h2>\u7ebf\u7a0b\u540c\u6b65\u901a\u5e38\u91c7\u7528\u4ee5\u4e0b\u4e09\u79cd\u65b9\u5f0f\uff1a\u540c\u6b65\u4ee3\u7801\u5757\uff0c\u540c\u6b65\u65b9\u6cd5\uff0c\u540c\u6b65\u9501\u3002<\/h2>\n<h2>\u540c\u6b65\u4ee3\u7801\u5757\uff1a<\/h2>\n<pre><code class=\"java\">synchronized(object){\n    \/\/\u9700\u8981\u540c\u6b65\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n<ul>\n<li>synchronized\u662f\u540c\u6b65\u5173\u952e\u5b57<\/p>\n<\/li>\n<li>\n<p>object\u662f\u540c\u6b65\u76d1\u89c6\u5668\uff0c\u7ebf\u7a0b\u5f00\u59cb\u6267\u884c\u540c\u6b65\u4ee3\u7801\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u83b7\u5f97\u5bf9\u540c\u6b65\u76d1\u89c6\u5668\u7684\u9501\u5b9a\uff0c<\/p>\n<\/li>\n<\/ul>\n<h3>\u6ce8\u610f\uff1a\u4efb\u4f55\u65f6\u5019\u90fd\u53ea\u80fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u83b7\u5f97\u5bf9\u540c\u6b65\u76d1\u89c6\u5668\u7684\u9501\u5b9a\uff0c\u5f53\u540c\u6b65\u4ee3\u7801\u5757\u6267\u884c\u5b8c\u540e\uff0c\u8be5\u7ebf\u7a0b\u4f1a\u91ca\u653e\u5bf9\u540c\u6b65\u76d1\u89c6\u5668\u7684\u9501\u5b9a\u3002<\/h3>\n<p>SynBlockBank.java<\/p>\n<pre><code>package com.rain.demo;\n\n\/**\n * Created by w-pc on 2017\/02\/24.\n *\/\npublic class NoSynBank extends Thread{\n    private BankAccount account;\n    private double money;\n    public NoSynBank(String name,BankAccount account,double money){\n        super(name);\n        this.account = account;\n        this.money = money;\n    }\n    public void run(){\n        synchronized (this.account) {\n            \/\/\u83b7\u53d6\u5f53\u524d\u91d1\u989d\n            double d = this.account.getBalance();\n            \/\/\u5224\u65ad\u5b58\u53d6\u91d1\u989d\u662f\u5426\u5927\u4e8e\u4f59\u989d\n            if (money &lt; 0 &amp;&amp; d - money &lt; 0) {\n                System.out.println(\"\u64cd\u4f5c\u5931\u8d25\");\n                return;\n            } else {\n                d += money;\n                System.out.println(this.getName() + \"\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a\" + d);\n                \/\/\u8bbe\u5b9a\u4f11\u7720\u4e00\u6beb\u79d2\uff0c\u4f7f\u5176\u4ed6\u7ebf\u7a0b\u5f97\u4ee5\u6267\u884c\n                try {\n                    Thread.sleep(1);\n                } catch (InterruptedException e) {\n                    e.printStackTrace();\n                }\n                this.account.setBalance(d);\n            }\n        }\n    }\n    public static void main(String[] args) {\n        \/\/\u5b9e\u4f8b\u5316\u4e00\u4e2a\u8d26\u6237\n        BankAccount myAccount = new BankAccount(\"60001002\",5000);\n        NoSynBank t1 = new NoSynBank(\"T001\",myAccount,-3000);\n        NoSynBank t2 = new NoSynBank(\"T002\", myAccount, -3000);\n        NoSynBank t3 = new NoSynBank(\"T003\",myAccount,1000);\n        NoSynBank t4 = new NoSynBank(\"T004\",myAccount,-2000);\n        NoSynBank t5 = new NoSynBank(\"T005\",myAccount,2000);\n        \/\/\u5c06\u7ebf\u7a0b\u5168\u90e8\u542f\u52a8\n        t1.start();\n        t2.start();\n        t3.start();\n        t4.start();\n        t5.start();\n        \/\/\u4f7f\u7528join\u65b9\u6cd5\u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\n        try {\n            t1.join();\n            t2.join();\n            t3.join();\n            t4.join();\n            t5.join();\n        }catch (InterruptedException e){\n            e.printStackTrace();\n        }\n        \/\/\u6253\u5370\u51fa\u5f53\u524d\u8d26\u6237\u7684\u4f59\u989d\n        System.out.println(\"\u8d26\u6237\uff1a\"+myAccount.getBankNo()+\",\u4f59\u989d\uff1a\"+myAccount.getBalance());\n    }\n}\n<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n<pre><code>T001\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a2000.0\nT005\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a4000.0\nT004\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a2000.0\nT003\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a3000.0\nT002\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a0.0\n\u8d26\u6237\uff1a60001002,\u4f59\u989d\uff1a0.0\n<\/code><\/pre>\n<h2>\u540c\u6b65\u65b9\u6cd5<\/h2>\n<p>[\u8bbf\u95ee\u4fee\u9970\u7b26] synchronized \u8fd4\u56de\u7c7b\u578b \u65b9\u6cd5\u540d([\u53c2\u6570\u5217\u8868]){<br \/>\n  \/\/\u65b9\u6cd5\u4f53<br \/>\n}<br \/>\n* synchronized\u5173\u952e\u5b57\u4fee\u9970\u7684\u5b9e\u4f8b\u65b9\u6cd5\u65e0\u987b\u663e\u793a\u7684\u6307\u5b9a\u540c\u6b65\u76d1\u89c6\u5668\uff0c\u540c\u6b65\u65b9\u6cd5\u7684\u540c\u6b65\u76d1\u89c6\u5668\u662fthis\uff0c\u5373\u8be5\u65b9\u6cd5\u6240\u5c5e\u7684\u5bf9\u8c61<br \/>\n* \u4e00\u65e6\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u5165\u4e00\u4e2a\u5b9e\u4f8b\u7684\u4efb\u4f55\u540c\u6b65\u65b9\u6cd5\uff0c\u5176\u4ed6\u7ebf\u7a0b\u5c06\u4e0d\u80fd\u8fdb\u5165\u8be5\u5b9e\u4f8b\u7684\u6240\u6709\u540c\u6b65\u65b9\u6cd5\uff0c\u4f46\u8be5\u5b9e\u4f8b\u7684\u975e\u540c\u6b65\u65b9\u6cd5\u4ecd\u7136\u80fd\u591f\u88ab\u8c03\u7528<br \/>\n* \u4f7f\u7528\u540c\u6b65\u65b9\u6cd5\u53ef\u4ee5\u975e\u5e38\u65b9\u4fbf\u7684\u5b9e\u73b0\u7ebf\u7a0b\u5b89\u5168\uff0c\u4e00\u4e2a\u5177\u6709\u540c\u6b65\u65b9\u6cd5\u7684\u7c7b\u4e5f\u88ab\u79f0\u4e3a\u201c\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b\u201d\uff0c\u8be5\u7c7b\u7684\u5bf9\u8c61\u53ef\u4ee5\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5b89\u5168\u7684\u8bbf\u95ee\uff0c\u5176\u6bcf\u4e2a\u7ebf\u7a0b\u8c03\u7528\u8be5\u5bf9\u8c61\u7684\u65b9\u6cd5\u540e\u90fd\u5c06\u5f97\u5230\u6b63\u786e\u7684\u7ed3\u679c<\/p>\n<h2>\u4ee3\u7801\uff1a<\/h2>\n<p>BankAccount.java<\/p>\n<pre><code>package com.rain.demo;\n\/**\n * Created by w-pc on 2017\/02\/24.\n *\n * \u6a21\u62df\u94f6\u884c\u8d26\u6237\n * *\/\npublic class BankAccount {\n    \/\/\u94f6\u884c\u8d26\u6237\n    private String bankNo;\n    \/\/\u94f6\u884c\u4f59\u989d\n    private double balance;\n    public BankAccount(String bankNo,double balance) {\n        this.bankNo = bankNo;\n        this.balance = balance;\n    }\n    public void setBankNo(String bankNo) {\n        this.bankNo = bankNo;\n    }\n    public void setBalance(double balance) {\n        this.balance = balance;\n    }\n    public double getBalance() {\n        return balance;\n    }\n    public String getBankNo() {\n        return bankNo;\n    }\n    public synchronized void access(double money){\n        if (money &lt; 0 &amp;&amp; balance - money &lt; 0) {\n            System.out.println(Thread.currentThread().getName()+\"\u64cd\u4f5c\u5931\u8d25\");\n            return;\n        } else {\n            balance += money;\n            System.out.println(Thread.currentThread().getName()+\"\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a\" + balance);\n            \/\/\u8bbe\u5b9a\u4f11\u7720\u4e00\u6beb\u79d2\uff0c\u4f7f\u5176\u4ed6\u7ebf\u7a0b\u5f97\u4ee5\u6267\u884c\n            try {\n                Thread.sleep(1);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<p>NosynBank.java<\/p>\n<pre><code>package com.rain.demo;\n\/**\n * Created by w-pc on 2017\/02\/24.\n *\/\npublic class NoSynBank extends Thread{\n    private BankAccount account;\n    private double money;\n    public NoSynBank(String name,BankAccount account,double money){\n        super(name);\n        this.account = account;\n        this.money = money;\n    }\n    public void run(){\n        this.account.access(money);\n    }\n    public static void main(String[] args) {\n        \/\/\u5b9e\u4f8b\u5316\u4e00\u4e2a\u8d26\u6237\n        BankAccount myAccount = new BankAccount(\"60001002\",5000);\n        NoSynBank t1 = new NoSynBank(\"T001\",myAccount,-3000);\n        NoSynBank t2 = new NoSynBank(\"T002\", myAccount, -3000);\n        NoSynBank t3 = new NoSynBank(\"T003\",myAccount,1000);\n        NoSynBank t4 = new NoSynBank(\"T004\",myAccount,-2000);\n        NoSynBank t5 = new NoSynBank(\"T005\",myAccount,2000);\n        \/\/\u5c06\u7ebf\u7a0b\u5168\u90e8\u542f\u52a8\n        t1.start();\n        t2.start();\n        t3.start();\n        t4.start();\n        t5.start();\n        \/\/\u4f7f\u7528join\u65b9\u6cd5\u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\n        try {\n            t1.join();\n            t2.join();\n            t3.join();\n            t4.join();\n            t5.join();\n        }catch (InterruptedException e){\n            e.printStackTrace();\n        }\n        \/\/\u6253\u5370\u51fa\u5f53\u524d\u8d26\u6237\u7684\u4f59\u989d\n        System.out.println(\"\u8d26\u6237\uff1a\"+myAccount.getBankNo()+\",\u4f59\u989d\uff1a\"+myAccount.getBalance());\n    }\n}\n<\/code><\/pre>\n<h3>\u8fd0\u884c\u7ed3\u679c:<\/h3>\n<pre><code>T001\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a2000.0\nT003\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a3000.0\nT005\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a5000.0\nT004\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a3000.0\nT002\u64cd\u4f5c\u6210\u529f\uff0c\u5f53\u524d\u4f59\u989d\uff1a0.0\n\u8d26\u6237\uff1a60001002,\u4f59\u989d\uff1a0.0\n<\/code><\/pre>\n<ul>\n<li>\u6ce8\u610f\uff1asynchronized\u9501\u5b9a\u7684\u662f\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u65b9\u6cd5\u6216\u4ee3\u7801\u5757\uff0csynchronized\u4e5f\u53ef\u4ee5\u4fee\u9970\u7c7b\uff0c\u5f53\u7528synchronized\u4fee\u9970\u7c7b\u65f6\uff0c\u8868\u793a\u8fd9\u4e2a\u7c7b\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u662fsynchronized\u7684<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2d\u7ebf\u7a0b\u540c\u6b65\u7684\u4e24\u79cd\u65b9\u5f0f \u5728\u591a\u7ebf\u7a0b\u4e2d\uff0c\u9700\u8981\u63a7\u5236\u7ebf\u7a0b\u7684\u8bbf\u95ee\u6b21\u6570\uff0c\u9891\u7387\u548c\u4f18\u5148\u7ea7\u3002\u6bd4\u5982\u5728\u53d6\u94b1\u65f6\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u4fee\u2026 <span class=\"read-more\"><a href=\"http:\/\/rain1024.com\/index.php\/2017\/02\/24\/java-article62\/\">Read More &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":224,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":""},"categories":[31],"tags":[46,84],"class_list":["post-588","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-java","tag-java","tag-thread","post_format-post-format-aside"],"_links":{"self":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/588","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/comments?post=588"}],"version-history":[{"count":1,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/588\/revisions"}],"predecessor-version":[{"id":1476,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/588\/revisions\/1476"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media\/224"}],"wp:attachment":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media?parent=588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/categories?post=588"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/tags?post=588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}