{"id":986,"date":"2026-03-23T11:14:01","date_gmt":"2026-03-23T03:14:01","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=986"},"modified":"2026-03-23T11:14:02","modified_gmt":"2026-03-23T03:14:02","slug":"%e3%80%90java%e3%80%91stringbuilder%e5%92%8cstringbuffer%ef%bc%9a%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%8b%bc%e6%8e%a5%e7%9a%84%e6%80%a7%e8%83%bd%e5%af%86%e7%a0%81","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=986","title":{"rendered":"\u3010Java\u3011StringBuilder\u548cStringBuffer\uff1a\u5b57\u7b26\u4e32\u62fc\u63a5\u7684\u6027\u80fd\u5bc6\u7801"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\u5440\uff5e \u4eca\u5929\u60f3\u548c\u5927\u5bb6\u804a\u804a Java \u91cc\u5b57\u7b26\u4e32\u62fc\u63a5\u7684\u300c\u6027\u80fd\u795e\u5668\u300d\u2014\u2014StringBuilder \u548c StringBuffer\uff01\u5e73\u65f6\u5f00\u53d1\u4e2d\u6211\u4eec\u603b\u514d\u4e0d\u4e86\u62fc\u63a5\u5b57\u7b26\u4e32\uff0c\u4f46\u5982\u679c\u7528 String \u76f4\u63a5 + \u53f7\u62fc\u63a5\uff0c\u5f88\u5bb9\u6613\u8e29\u5185\u5b58\u6d6a\u8d39\u7684\u5751\uff0c\u8fd9\u65f6\u5019\u8fd9\u4e24\u4e2a\u5de5\u5177\u7c7b\u5c31\u8be5\u767b\u573a\u5566\uff5e \u4e0b\u9762\u7ed3\u5408\u6e90\u7801\u548c\u5b9e\u9645\u573a\u666f\uff0c\u548c\u5927\u5bb6\u8be6\u7ec6\u62c6\u89e3\u5b83\u4eec\u7684\u533a\u522b\u3001\u7528\u6cd5\u548c\u5185\u90e8\u5b9e\u73b0\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u4e3a\u4ec0\u4e48\u9700\u8981 StringBuilder\/StringBuffer\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u5f97\u660e\u786e\u4e00\u4e2a\u6838\u5fc3\u70b9\uff1a<strong>String \u662f\u4e0d\u53ef\u53d8\u7684<\/strong>\uff01\u6bcf\u6b21\u7528 <code>+<\/code> \u53f7\u62fc\u63a5\u5b57\u7b26\u4e32\uff0cJVM \u90fd\u4f1a\u521b\u5efa\u65b0\u7684 String \u5bf9\u8c61\uff0c\u9891\u7e41\u62fc\u63a5\u4f1a\u4ea7\u751f\u5927\u91cf\u65e0\u7528\u5bf9\u8c61\uff0c\u6d6a\u8d39\u5185\u5b58\u8fd8\u5f71\u54cd\u6548\u7387\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u770b\u4f3c\u7b80\u5355\u7684\u62fc\u63a5\uff0c\u5b9e\u5219\u521b\u5efa\u4e863\u4e2aString\u5bf9\u8c61\uff1a\"\u4e91\u626c\"\u3001\"\u4e09\u59b9\"\u3001\"\u4e91\u626c\u4e09\u59b9\"\nString str = new String(\"\u4e91\u626c\") + new String(\"\u4e09\u59b9\");\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cJava \u63d0\u4f9b\u4e86\u4e13\u95e8\u7528\u4e8e\u52a8\u6001\u4fee\u6539\u5b57\u7b26\u4e32\u7684\u5de5\u5177\u7c7b \u2014\u2014StringBuffer \u548c StringBuilder\uff0c\u5b83\u4eec\u7684\u6838\u5fc3\u4f18\u52bf\u662f<strong>\u53ef\u53d8\u5b57\u7b26\u5e8f\u5217<\/strong>\uff0c\u62fc\u63a5\u65f6\u4e0d\u4f1a\u9891\u7e41\u521b\u5efa\u65b0\u5bf9\u8c61\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001StringBuilder \u548c StringBuffer \u7684\u6838\u5fc3\u533a\u522b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u8005\u529f\u80fd\u51e0\u4e4e\u5b8c\u5168\u4e00\u81f4\uff0c\u6700\u5927\u5dee\u5f02\u5728\u4e8e\u300c\u7ebf\u7a0b\u5b89\u5168\u300d\u548c\u300c\u6548\u7387\u300d\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u7279\u6027<\/th><th class=\"has-text-align-left\" data-align=\"left\">StringBuffer<\/th><th class=\"has-text-align-left\" data-align=\"left\">StringBuilder<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">\u7ebf\u7a0b\u5b89\u5168<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u662f\uff08\u65b9\u6cd5\u52a0\u4e86 synchronized\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5426\uff08\u65e0\u540c\u6b65\u9501\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u6267\u884c\u6548\u7387<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u8f83\u4f4e\uff08\u9501\u5f00\u9500\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u8f83\u9ad8\uff08\u65e0\u9501\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u9002\u7528\u573a\u666f<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u591a\u7ebf\u7a0b\u73af\u5883\uff08\u5982\u5e76\u53d1\u4fee\u6539\u5b57\u7b26\u4e32\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5355\u7ebf\u7a0b\u73af\u5883\uff08\u5982\u666e\u901a\u4e1a\u52a1\u903b\u8f91\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u6e90\u7801\u5bf9\u6bd4\uff08\u5173\u952e\u5dee\u5f02\u4e00\u76ee\u4e86\u7136\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>StringBuffer \u7684 append \u65b9\u6cd5<\/strong>\uff08\u5e26\u540c\u6b65\u9501\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public synchronized StringBuffer append(String str) {\n    super.append(str);\n    return this;\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>StringBuilder \u7684 append \u65b9\u6cd5<\/strong>\uff08\u65e0\u9501\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public StringBuilder append(String str) {\n    super.append(str);\n    return this;\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4f59\u65b9\u6cd5\uff08\u5982 <code>insert<\/code>\u3001<code>delete<\/code>\u3001<code>reverse<\/code>\uff09\u7684\u5b9e\u73b0\u5b8c\u5168\u4e00\u81f4\uff0c\u4ec5\u5dee <code>synchronized<\/code> \u5173\u952e\u5b57\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u7ebf\u7a0b\u573a\u666f\u7684\u66ff\u4ee3\u65b9\u6848<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9700\u8981\u5728\u591a\u7ebf\u7a0b\u4e2d\u4f7f\u7528 StringBuilder\uff08\u8ffd\u6c42\u6548\u7387\uff09\uff0c\u53ef\u4ee5\u7528 <code>ThreadLocal<\/code> \u907f\u514d\u51b2\u7a81\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.lang.ThreadLocal;\n\npublic class ThreadLocalStringBuilderDemo {\n   \n    \/\/ \u6bcf\u4e2a\u7ebf\u7a0b\u6301\u6709\u72ec\u7acb\u7684StringBuilder\u5b9e\u4f8b\uff0c\u65e0\u9501\u4e14\u7ebf\u7a0b\u5b89\u5168\n    private static ThreadLocal&lt;StringBuilder> threadLocal = ThreadLocal.withInitial(StringBuilder::new);\n\n    public static void main(String&#91;] args) {\n        \/\/ \u793a\u4f8b\uff1a\u521b\u5efa\u4e24\u4e2a\u7ebf\u7a0b\u6d4b\u8bd5\u7ebf\u7a0b\u5b89\u5168\n        Thread thread1 = new Thread(() -> {\n            useStringBuilder(\"\u7ebf\u7a0b1\uff1a\");\n        });\n\n        Thread thread2 = new Thread(() -> {\n            useStringBuilder(\"\u7ebf\u7a0b2\uff1a\");\n        });\n\n        thread1.start();\n        thread2.start();\n    }\n\n    \/**\n     * \u7ebf\u7a0b\u5185\u4f7f\u7528ThreadLocal\u7ba1\u7406\u7684StringBuilder\n     * @param prefix \u7ebf\u7a0b\u6807\u8bc6\u524d\u7f00\n     *\/\n    private static void useStringBuilder(String prefix) {\n        try {\n            \/\/ \u7ebf\u7a0b\u5185\u83b7\u53d6\u72ec\u7acb\u7684StringBuilder\u5b9e\u4f8b\n            StringBuilder sb = threadLocal.get();\n            sb.append(prefix).append(\"\u7ebf\u7a0b\u5b89\u5168\u7684\u62fc\u63a5\").append(\" - \").append(System.currentTimeMillis());\n            \n            \/\/ \u6253\u5370\u7ed3\u679c\uff0c\u9a8c\u8bc1\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u5b9e\u4f8b\u72ec\u7acb\n            System.out.println(Thread.currentThread().getName() + \" \u62fc\u63a5\u7ed3\u679c\uff1a\" + sb.toString());\n        } finally {\n            \/\/ \u5173\u952e\uff1a\u4f7f\u7528\u5b8c\u540e\u79fb\u9664\u5f53\u524d\u7ebf\u7a0b\u7684\u5b9e\u4f8b\uff0c\u907f\u514dThreadLocal\u5185\u5b58\u6cc4\u6f0f\n            threadLocal.remove();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001StringBuilder \u7684\u4f7f\u7528\u6280\u5de7\uff08\u7f16\u8bd1\u5668\u90fd\u5728\u5077\u5077\u4f18\u5316\uff01\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u4eba\u4e0d\u77e5\u9053\uff0cJava \u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5c06 <code>+<\/code> \u53f7\u62fc\u63a5\u4f18\u5316\u4e3a StringBuilder\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u6211\u4eec\u5199\u7684\u4ee3\u7801\nString result = \"Hello\" + \"World\" + \"Java\";\n\n\/\/ \u7f16\u8bd1\u5668\u4f18\u5316\u540e\u7684\u4ee3\u7801\uff08\u7b49\u4ef7\u4e8e\uff09\nString result = new StringBuilder()\n    .append(\"Hello\")\n    .append(\"World\")\n    .append(\"Java\")\n    .toString();\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\uff1a<strong>\u5355\u7ebf\u7a0b\u4e0b\u76f4\u63a5\u7528 + \u53f7\u62fc\u63a5\uff0c\u548c\u624b\u52a8\u521b\u5efa StringBuilder \u6548\u7387\u51e0\u4e4e\u4e00\u81f4<\/strong>\uff01\u65e2\u65b9\u4fbf\u53c8\u9ad8\u6548\uff5e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u6ce8\u610f\uff1a\u5faa\u73af\u5185\u7684\u62fc\u63a5\u4e0d\u8981\u76f4\u63a5\u7528 + \u53f7\uff01\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u53cd\u9762\u4f8b\u5b50\uff1a\u5faa\u73af\u5185\u521b\u5efa\u5927\u91cfStringBuilder\u5bf9\u8c61\uff08\u6bcf\u6b21\u5faa\u73af\u90fdnew\uff09\nString str = \"\";\nfor (int i = 0; i&lt; 1000; i++) {\n    str += i; \/\/ \u4f4e\u6548\uff01\n}\n\n\/\/ \u6b63\u9762\u4f8b\u5b50\uff1a\u590d\u7528\u4e00\u4e2aStringBuilder\nStringBuilder sb = new StringBuilder();\nfor (int i = 0; i &lt; 1000; i++) {\n    sb.append(i); \/\/ \u9ad8\u6548\uff01\n}\nString str = sb.toString();\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001StringBuilder \u7684\u5185\u90e8\u5b9e\u73b0\u63ed\u79d8<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u521d\u59cb\u5bb9\u91cf\u4e0e\u6269\u5bb9\u673a\u5236<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e0\u53c2\u6784\u9020\u9ed8\u8ba4\u521d\u59cb\u5bb9\u91cf\uff1a<strong>16 \u4e2a\u5b57\u7b26<\/strong> <\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>public StringBuilder() {\n    super(16); \/\/ \u8c03\u7528\u7236\u7c7bAbstractStringBuilder\u7684\u6784\u9020\u65b9\u6cd5\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6269\u5bb9\u89c4\u5219\uff1a\u5f53\u62fc\u63a5\u540e\u5b57\u7b26\u957f\u5ea6\u8d85\u8fc7\u5f53\u524d\u5bb9\u91cf\u65f6\uff0c\u89e6\u53d1\u6269\u5bb9<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7236\u7c7bAbstractStringBuilder\u7684\u6269\u5bb9\u6838\u5fc3\u65b9\u6cd5\nprivate void ensureCapacityInternal(int minimumCapacity) {\n    if (minimumCapacity - value.length > 0) {\n        \/\/ \u65b0\u5bb9\u91cf = \u65e7\u5bb9\u91cf * 2 + 2\uff08+2\u662f\u4e3a\u4e86\u907f\u514d\u6781\u5c0f\u5bb9\u91cf\u65f6\u6269\u5bb9\u4e0d\u8db3\uff09\n        value = Arrays.copyOf(value, newCapacity(minimumCapacity));\n    }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udc49 \u5c0f\u6280\u5de7\uff1a\u5982\u679c\u9884\u77e5\u5b57\u7b26\u4e32\u957f\u5ea6\uff08\u6bd4\u5982\u62fc\u63a5 100 \u4e2a\u5b57\u7b26\uff09\uff0c\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\u521d\u59cb\u5bb9\u91cf\uff0c\u907f\u514d\u6269\u5bb9\u5f00\u9500\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u521d\u59cb\u5bb9\u91cf\u8bbe\u4e3a100\uff0c\u51cf\u5c11\u6570\u7ec4\u62f7\u8d1d\u6b21\u6570\nStringBuilder sb = new StringBuilder(100);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. append \u65b9\u6cd5\u7684\u5de5\u4f5c\u6d41\u7a0b<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public StringBuilder append(String str) {\n    super.append(str); \/\/ \u8c03\u7528\u7236\u7c7bAbstractStringBuilder\u7684append\n    return this; \/\/ \u94fe\u5f0f\u8c03\u7528\u7684\u5173\u952e\uff08\u8fd4\u56de\u81ea\u8eab\uff09\n}\n\n\/\/ \u7236\u7c7b\u6838\u5fc3\u903b\u8f91\npublic AbstractStringBuilder append(String str) {\n    if (str == null) {\n        return appendNull(); \/\/ \u62fc\u63a5null\u65f6\uff0c\u5b9e\u9645\u6dfb\u52a0\"null\"\u5b57\u7b26\u4e32\n    }\n    int len = str.length();\n    ensureCapacityInternal(count + len); \/\/ \u68c0\u67e5\u5bb9\u91cf\uff0c\u4e0d\u591f\u5219\u6269\u5bb9\n    str.getChars(0, len, value, count); \/\/ \u76f4\u63a5\u62f7\u8d1d\u5b57\u7b26\u5230\u5185\u90e8\u6570\u7ec4\n    count += len; \/\/ \u66f4\u65b0\u5b57\u7b26\u957f\u5ea6\u8ba1\u6570\u5668\n    return this;\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. toString \u65b9\u6cd5\uff1a\u4e0d\u53ef\u53d8\u7684\u6700\u7ec8\u8f6c\u6362<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public String toString() {\n    \/\/ \u7528\u5185\u90e8\u5b57\u7b26\u6570\u7ec4value\u7684\u524dcount\u4e2a\u5b57\u7b26\u521b\u5efa\u65b0String\n    return new String(value, 0, count);\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f \u6ce8\u610f\uff1a<code>toString()<\/code> \u4f1a\u521b\u5efa\u65b0\u7684 String \u5bf9\u8c61\uff0c\u6240\u4ee5\u62fc\u63a5\u5b8c\u6210\u540e\u518d\u8c03\u7528\uff0c\u907f\u514d\u4e2d\u9014\u591a\u6b21\u8c03\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. reverse \u65b9\u6cd5\uff1a\u9ad8\u6548\u53cd\u8f6c\u5b57\u7b26\u5e8f\u5217<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public StringBuilder reverse() {\n    super.reverse();\n    return this;\n}\n\n\/\/ \u7236\u7c7b\u53cd\u8f6c\u6838\u5fc3\u903b\u8f91\uff08\u53cc\u6307\u9488\u4ea4\u6362\uff0c\u65f6\u95f4\u590d\u6742\u5ea6O(n\/2)\uff09\npublic AbstractStringBuilder reverse() {\n    int n = count - 1;\n    \/\/ (n-1)>>1 \u7b49\u4ef7\u4e8e (n-1)\/2\uff0c\u904d\u5386\u524d\u534a\u90e8\u5206\n    for (int j = (n - 1) >> 1; j >= 0; j--) {\n        int k = n - j; \/\/ \u5bf9\u79f0\u4f4d\u7f6e\u7d22\u5f15\n        char cj = value&#91;j];\n        char ck = value&#91;k];\n        value&#91;j] = ck;\n        value&#91;k] = cj; \/\/ \u4ea4\u6362\u5bf9\u79f0\u4f4d\u7f6e\u7684\u5b57\u7b26\n    }\n    return this;\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u6cd5\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>StringBuilder sb = new StringBuilder(\"\u4e91\u626c\u6280\u672f\u7b14\u8bb0\");\nsb.reverse();\nSystem.out.println(sb.toString()); \/\/ \u8f93\u51fa\uff1a\u8bb0\u7b14\u672f\u6280\u626c\u4e91\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u5f00\u53d1\u5b9e\u6218\u5efa\u8bae<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f18\u5148\u7528 StringBuilder<\/strong>\uff1a\u5355\u7ebf\u7a0b\u573a\u666f\u4e0b\u6548\u7387\u6700\u9ad8\uff0c\u662f\u65e5\u5e38\u5f00\u53d1\u7684\u9996\u9009\uff1b<\/li>\n\n\n\n<li><strong>\u591a\u7ebf\u7a0b\u7528 StringBuffer \u6216 ThreadLocal+StringBuilder<\/strong>\uff1a\u524d\u8005\u7b80\u5355\u76f4\u63a5\uff0c\u540e\u8005\u6548\u7387\u66f4\u9ad8\uff1b<\/li>\n\n\n\n<li><strong>\u6307\u5b9a\u521d\u59cb\u5bb9\u91cf<\/strong>\uff1a\u9884\u77e5\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\uff0c\u6784\u9020\u65b9\u6cd5\u4f20\u5165\u5bb9\u91cf\uff08\u5982 <code>new StringBuilder(200)<\/code>\uff09\uff1b<\/li>\n\n\n\n<li><strong>\u907f\u514d\u9891\u7e41 toString ()<\/strong>\uff1a\u62fc\u63a5\u8fc7\u7a0b\u4e2d\u5c3d\u91cf\u4e0d\u8c03\u7528\uff0c\u6700\u540e\u7edf\u4e00\u8f6c\u6362\uff1b<\/li>\n\n\n\n<li><strong>\u5faa\u73af\u62fc\u63a5\u7981\u7528 + \u53f7<\/strong>\uff1a\u5fc5\u987b\u7528 StringBuilder \u590d\u7528\u5bf9\u8c61\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8e StringBuilder \u548c StringBuffer \u7684\u5168\u89e3\u6790\u5566\uff5e \u5176\u5b9e\u6838\u5fc3\u5c31\u662f\u300c\u53ef\u53d8\u5e8f\u5217 + \u7ebf\u7a0b\u5b89\u5168\u53d6\u820d\u300d\uff0c\u638c\u63e1\u4e86\u6269\u5bb9\u673a\u5236\u548c\u4f7f\u7528\u573a\u666f\uff0c\u5c31\u80fd\u5728\u5f00\u53d1\u4e2d\u907f\u514d\u8e29\u5751\u3001\u63d0\u5347\u6027\u80fd\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5927\u5bb6\u6709\u5b9e\u9645\u9879\u76ee\u4e2d\u9047\u5230\u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u95ee\u9898\uff0c\u6216\u8005\u60f3\u4e86\u89e3\u66f4\u591a\u6e90\u7801\u7ec6\u8282\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u4ea4\u6d41\uff5e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\u5440\uff5e \u4eca\u5929\u60f3\u548c\u5927\u5bb6\u804a\u804a Java \u91cc\u5b57\u7b26\u4e32\u62fc\u63a5\u7684\u300c\u6027\u80fd\u795e\u5668\u300d\u2014\u2014StringBuilder \u548c Stri<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=986\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-986","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/986","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=986"}],"version-history":[{"count":5,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/986\/revisions"}],"predecessor-version":[{"id":992,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/986\/revisions\/992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/990"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=986"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=986"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=986"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}