{"id":31592,"date":"2023-07-13T12:56:53","date_gmt":"2023-08-16T13:40:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%af%ad%e6%b3%95-3\/"},"modified":"2024-04-30T13:23:17","modified_gmt":"2024-04-30T05:23:17","slug":"java%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%af%ad%e6%b3%95-3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%af%ad%e6%b3%95-3\/","title":{"rendered":"Java\u7684\u57fa\u672c\u8bed\u6cd5"},"content":{"rendered":"<h1>\u4eca\u5929\u5b66\u5230\u7684\u4e1c\u897f<\/h1>\n<p>\u7a0b\u5e8f\u6267\u884c\u7684\u6d41\u7a0b<br \/>\n\u2474\u7f16\u5199\u6e90\u4ee3\u7801\u3002<br \/>\n\u2475\u4f7f\u7528\u7f16\u8bd1\u5668\u8f6f\u4ef6\u5c06\u6e90\u4ee3\u7801\u7f16\u8bd1\u4e3a\u5b57\u8282\u7801\uff08\u6570\u5b57\u5e8f\u5217\uff09\u3002<br \/>\n\u2476\u4f7f\u7528\u89e3\u91ca\u5668\u8f6f\u4ef6\uff08JVM\uff09\u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u673a\u5668\u7801\uff0c\u5e76\u53d1\u9001\u5230\u8ba1\u7b97\u673a\u7684CPU\u3002<\/p>\n<ul class=\"post-ul\">Java\u30d5\u30a1\u30a4\u30eb\u306e\u62e1\u5f35\u5b50\u306f.java\u306b\u306a\u308b\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"kp\">public<\/span> <span class=\"k\">class<\/span> <span class=\"err\">\u30af\u30e9\u30b9\u540d<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kp\">public<\/span> <span class=\"n\">static<\/span> <span class=\"n\">void<\/span> <span class=\"err\">\u30e1\u30bd\u30c3\u30c9\u540d<\/span> <span class=\"p\">(<\/span><span class=\"no\">String<\/span><span class=\"p\">[]<\/span> <span class=\"n\">args<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c1\">#\u51e6\u7406\u3092\u66f8\u304f;<\/span>\r\n  <span class=\"p\">}<\/span> \r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u8bb0\u4f4f\u4e86\u8fd9\u4e2a\u8bed\u6cd5\uff0c\u7b11\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u7c7b\u4e2d\u7684\u90e8\u5206\u79f0\u4e3a\u7c7b\u5757\uff0c\u5c06\u65b9\u6cd5\u4e2d\u7684\u90e8\u5206\u79f0\u4e3a\u65b9\u6cd5\u5757\u3002<\/p>\n<ul class=\"post-ul\">System.out.println(\u3000);<\/ul>\n<p>\u5c06\u4f20\u5165\u7684\u53c2\u6570\u503c\u8f93\u51fa\u3002<\/p>\n<h3>\u53d8\u91cf\u7684\u5b9a\u4e49<\/h3>\n<p>\u53d8\u91cf\u7684\u5b9a\u4e49<\/p>\n<pre class=\"post-pre\"><code><span class=\"err\">\u30c7\u30fc\u30bf\u578b<\/span> <span class=\"err\">\u5909\u6570\u540d<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">#\u4f8b\u3048\u3070<\/span>\r\n<span class=\"n\">int<\/span> <span class=\"n\">price<\/span><span class=\"p\">;<\/span> <span class=\"c1\">#\u6700\u521d\u306b\u5909\u6570\u3092\u5ba3\u8a00\u3057\u3066\u304a\u304f\u3002<\/span>\r\n<span class=\"n\">price<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span> <span class=\"c1\">#\u6b21\u306b\u5909\u6570\u306b\u30c7\u30fc\u30bf\u3092\u4ee3\u5165\u3059\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u8fd8\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\u53d8\u91cf\u7684\u58f0\u660e\u548c\u8d4b\u503c\u3002<br \/>\n\uff08\u8fd9\u79cd\u65b9\u6cd5\u88ab\u79f0\u4e3a\u53d8\u91cf\u521d\u59cb\u5316\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"err\">\u30c7\u30fc\u30bf\u578b<\/span> <span class=\"err\">\u5909\u6570\u540d<\/span> <span class=\"o\">=<\/span> <span class=\"err\">\u5024<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">#\u4f8b\u3048\u3070<\/span>\r\n<span class=\"n\">int<\/span> <span class=\"n\">price<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53d8\u91cf\u53ef\u4ee5\u88ab\u8986\u76d6\u3002<br \/>\n\u4f46\u662f\u50cf\u5706\u5468\u7387\u6216\u8005\u7a0e\u7387\u8fd9\u6837\u7684\u5e38\u91cf\u662f\u4e0d\u4f1a\u6539\u53d8\u7684\uff0c\u6240\u4ee5\u5982\u679c\u88ab\u8986\u76d6\u5c06\u4f1a\u53d8\u5f97\u975e\u5e38\u9ebb\u70e6\u3002<br \/>\n\u56e0\u6b64\u6211\u4eec\u4f1a\u52a0\u4e0a&#8221;final&#8221;\u4f5c\u4e3a\u5e38\u91cf\u5e76\u8fdb\u884c\u8d4b\u503c\u3002<br \/>\n\u5e38\u91cf\u4e00\u822c\u4f7f\u7528\u534a\u89d2\u5927\u5199\u5b57\u6bcd\u58f0\u660e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">final<\/span> <span class=\"n\">int<\/span> <span class=\"no\">PRICE<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">;<\/span> <span class=\"c1\">#final\u4ed8\u304d\u3067\u5ba3\u8a00\u3059\u308b\u3068\u5024\u3092\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u6570\u636e\u7c7b\u578b\u7684\u79cd\u7c7b<\/p>\n<div>\n<div class=\"post-table\">\u5206\u985e\u578b\u540d\u683c\u7d0d\u3059\u308b\u30c7\u30fc\u30bf\u6574\u6570long\u5927\u304d\u306a\u6574\u6570(\u6d88\u8cbb\u30e1\u30e2\u30ea 8\u30d0\u30a4\u30c8)<br \/>\nint\u666e\u901a\u306e\u6574\u6570(\u6d88\u8cbb\u30e1\u30e2\u30ea 4\u30d0\u30a4\u30c8)<br \/>\nshort\u5c0f\u3055\u306a\u6574\u6570(\u6d88\u8cbb\u30e1\u30e2\u30ea 2\u30d0\u30a4\u30c8)<br \/>\nbyte\u3055\u3089\u306b\u5c0f\u3055\u306a\u6574\u6570(\u6d88\u8cbb\u30e1\u30e2\u30ea 1\u30d0\u30a4\u30c8)\u5c11\u6570double\u666e\u901a\u306e\u5c11\u6570<br \/>\nfloat\u5c11\u3057\u66d6\u6627\u3067\u3082\u3044\u3044\u5c11\u6570\u771f\u507d\u5024booleantrue\u304bfalse\u6587\u5b57char1\u3064\u306e\u6587\u5b57(&#8216;\u3067\u6587\u5b57\u3092\u56f2\u3080)\u6587\u5b57\u5217String\u6587\u5b57\u306e\u4e26\u3073(&#8220;\u3067\u6587\u5b57\u3092\u56f2\u3080)<\/div>\n<\/div>\n<ul class=\"post-ul\">\u30aa\u30da\u30e9\u30f3\u30c9\u30fb\u6f14\u7b97\u5b50<\/ul>\n<pre class=\"post-pre\"><code><span class=\"n\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span> <span class=\"c1\">#\u6f14\u7b97\u5b50\u3067\u3042\u308b=\u3084+\u4ee5\u5916\u306eage\u308420\u3001\uff15(\u5909\u6570\u3084\u5024\u306e\u3053\u3068)\u304c\u30aa\u30da\u30e9\u30f3\u30c9\u3068\u547c\u3070\u308c\u308b\u3002<\/span>\r\n<span class=\"c1\">#\u5168\u3066\u306e\u5f0f\u306f\u3053\u306e\uff12\u3064\u306e\u8981\u7d20\u3060\u3051\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u64cd\u4f5c\u6570\u4e2d\uff0c\u88ab\u5206\u914d\u7ed9\u53d8\u91cf\u7684\u503c\u3001\u5728\u6e90\u4ee3\u7801\u4e2d\u5199\u5165\u7684\u6570\u5b57\u3001\u5b57\u7b26\u4ee5\u53ca\u5b57\u7b26\u4e32\u7684\u503c\u88ab\u79f0\u4e3a\u5b57\u9762\u91cf\u3002<br \/>\n\u6bcf\u4e2a\u5b57\u9762\u91cf\u90fd\u5177\u6709\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<ul class=\"post-ul\">\u4ee3\u5165\u6f14\u7b97\u5b50<\/ul>\n<pre class=\"post-pre\"><code><span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;10, \u53f3\u8fba\u3092\u5de6\u8fba\u306b\u4ee3\u5165\u3059\u308b<\/span>\r\n<span class=\"n\">a<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;a = a + 10, \u5de6\u8fba\u3068\u53f3\u8fba\u3092\u52a0\u7b97\u3057\u3066\u5de6\u8fba\u306b\u4ee3\u5165, \u6587\u5b57\u3092\u52a0\u7b97\u306e\u5bfe\u8c61\u3068\u3057\u305f\u5834\u5408\u5de6\u8fba\u3068\u53f3\u8fba\u304c\u9023\u7d50\u3055\u308c\u308b<\/span>\r\n<span class=\"n\">a<\/span> <span class=\"o\">-=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;a = a - 10, \u5de6\u8fba\u3068\u53f3\u8fba\u3092\u6e1b\u7b97\u3057\u3066\u5de6\u8fba\u306b\u4ee3\u5165<\/span>\r\n<span class=\"n\">a<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;a = a * 10, \u5de6\u8fba\u3068\u53f3\u8fba\u3092\u4e58\u7b97\u3057\u3066\u5de6\u8fba\u306b\u4ee3\u5165<\/span>\r\n<span class=\"n\">a<\/span> <span class=\"o\">\/=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;a = a \/ 10, \u5de6\u8fba\u3068\u53f3\u8fba\u3092\u9664\u7b97\u3057\u3066\u5de6\u8fba\u306b\u4ee3\u5165<\/span>\r\n<span class=\"n\">a<\/span> <span class=\"o\">%=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span> <span class=\"c1\"># =&gt;a = a % 10, \u5de6\u8fba\u3068\u53f3\u8fba\u3092\u9664\u7b97\u3057\u3066\u305d\u306e\u4f59\u308a\u3092\u5de6\u8fba\u306b\u4ee3\u5165<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u30fb\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u6f14\u7b97\u5b50<\/ul>\n<pre class=\"post-pre\"><code><span class=\"n\">a<\/span><span class=\"o\">++<\/span><span class=\"p\">(<\/span><span class=\"err\">\u307e\u305f\u306f<\/span><span class=\"o\">++<\/span><span class=\"n\">a<\/span><span class=\"p\">);<\/span> <span class=\"c1\"># =&gt;a + 1,\u3000a\u306b\u5bfe\u3057\u30661\u3060\u3051\u52a0\u7b97\u3055\u308c\u308b\u3002<\/span>\r\n<span class=\"n\">a<\/span><span class=\"o\">--<\/span><span class=\"p\">(<\/span><span class=\"err\">\u307e\u305f\u306f<\/span><span class=\"o\">--<\/span><span class=\"n\">a<\/span><span class=\"p\">);<\/span> <span class=\"c1\"># =&gt;a - 1, a\u306b\u5bfe\u3057\u30661\u3060\u3051\u6e1b\u7b97\u3055\u308c\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u5982\u679c\u5c06\u9012\u589e\u548c\u9012\u51cf\u8fd0\u7b97\u7b26\u4e0e\u5176\u4ed6\u8fd0\u7b97\u7b26\u4e00\u8d77\u4f7f\u7528\uff0c\u4f1a\u4ea7\u751f\u5fae\u5999\u7684\u5dee\u5f02\uff0c\u56e0\u6b64\u5c3d\u91cf\u5355\u72ec\u4f7f\u7528\u3002<\/p>\n<ul class=\"post-ul\">\u578b\u306e\u5909\u63db<\/ul>\n<p>\u5728\u7ed9\u53d8\u91cf\u8d4b\u503c\u65f6\u7684\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362<br \/>\nbyte &lt; short &lt; int &lt; long &lt; float &lt; double<br \/>\n\u5c0f\u3000\u2190\u3000\u3000\u3000\u3000\u2192\u3000\u5927<br \/>\n\u5f53\u5c06\u5c0f\u7c7b\u578b\u7684\u503c\u8d4b\u7ed9\u5927\u7c7b\u578b\u7684\u53d8\u91cf\u65f6\uff0c\u8d4b\u503c\u4f1a\u5728\u88ab\u8d4b\u503c\u7684\u503c\u81ea\u52a8\u8f6c\u6362\u4e3a\u76ee\u6807\u53d8\u91cf\u7684\u7c7b\u578b\u540e\u8fdb\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5929\u5b66\u5230\u7684\u4e1c\u897f \u7a0b\u5e8f\u6267\u884c\u7684\u6d41\u7a0b \u2474\u7f16\u5199\u6e90\u4ee3\u7801\u3002 \u2475\u4f7f\u7528\u7f16\u8bd1\u5668\u8f6f\u4ef6\u5c06\u6e90\u4ee3\u7801\u7f16\u8bd1\u4e3a\u5b57\u8282\u7801\uff08\u6570\u5b57\u5e8f\u5217\uff09\u3002 \u2476\u4f7f\u7528\u89e3\u91ca [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31592","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u7684\u57fa\u672c\u8bed\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684\u57fa\u672c\u8bed\u6cd5-3\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u7684\u57fa\u672c\u8bed\u6cd5\" \/>\n<meta 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