如何使用SubString取得一个值的后六位 java取字符串后面几位数怎么取
\u5728JS\u91cc\u5982\u4f55\u622a\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u540e\u516d\u4f4d\u5b57\u7b26substr \u65b9\u6cd5
\u8fd4\u56de\u4e00\u4e2a\u4ece\u6307\u5b9a\u4f4d\u7f6e\u5f00\u59cb\u7684\u6307\u5b9a\u957f\u5ea6\u7684\u5b50\u5b57\u7b26\u4e32\u3002
stringvar.substr(start [, length ])
\u53c2\u6570
stringvar
\u5fc5\u9009\u9879\u3002\u8981\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4e32\u6587\u5b57\u6216 String \u5bf9\u8c61\u3002
start
\u5fc5\u9009\u9879\u3002\u6240\u9700\u7684\u5b50\u5b57\u7b26\u4e32\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002\u5b57\u7b26\u4e32\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u7d22\u5f15\u4e3a 0\u3002
length
\u53ef\u9009\u9879\u3002\u5728\u8fd4\u56de\u7684\u5b50\u5b57\u7b26\u4e32\u4e2d\u5e94\u5305\u62ec\u7684\u5b57\u7b26\u4e2a\u6570\u3002
\u8bf4\u660e
\u5982\u679c length \u4e3a 0 \u6216\u8d1f\u6570\uff0c\u5c06\u8fd4\u56de\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u8be5\u53c2\u6570\uff0c\u5219\u5b50\u5b57\u7b26\u4e32\u5c06\u5ef6\u7eed\u5230 stringvar \u7684\u6700\u540e\u3002
\u793a\u4f8b
\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e86substr \u65b9\u6cd5\u7684\u7528\u6cd5\u3002
function SubstrDemo(){
var s, ss; // \u58f0\u660e\u53d8\u91cf\u3002
var s = "The rain in Spain falls mainly in the plain.";
ss = s.substr(12, 5); // \u83b7\u53d6\u5b50\u5b57\u7b26\u4e32\u3002
return(ss); // \u8fd4\u56de "Spain"\u3002
}
substring \u65b9\u6cd5
\u8fd4\u56de\u4f4d\u4e8e String \u5bf9\u8c61\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u7684\u5b50\u5b57\u7b26\u4e32\u3002
strVariable.substring(start, end)
"String Literal".substring(start, end)
\u53c2\u6570
start
\u6307\u660e\u5b50\u5b57\u7b26\u4e32\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u8be5\u7d22\u5f15\u4ece 0 \u5f00\u59cb\u8d77\u7b97\u3002
end
\u6307\u660e\u5b50\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u4f4d\u7f6e\uff0c\u8be5\u7d22\u5f15\u4ece 0 \u5f00\u59cb\u8d77\u7b97\u3002
\u8bf4\u660e
substring \u65b9\u6cd5\u5c06\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u4ece start \u5230\u6700\u540e\uff08\u4e0d\u5305\u542b end \uff09\u7684\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4e32\u3002
substring \u65b9\u6cd5\u4f7f\u7528 start \u548c end \u4e24\u8005\u4e2d\u7684\u8f83\u5c0f\u503c\u4f5c\u4e3a\u5b50\u5b57\u7b26\u4e32\u7684\u8d77\u59cb\u70b9\u3002\u4f8b\u5982\uff0c strvar.substring(0, 3) \u548c strvar.substring(3, 0) \u5c06\u8fd4\u56de\u76f8\u540c\u7684\u5b50\u5b57\u7b26\u4e32\u3002
\u5982\u679c start \u6216 end \u4e3a NaN \u6216\u8005\u8d1f\u6570\uff0c\u90a3\u4e48\u5c06\u5176\u66ff\u6362\u4e3a0\u3002
\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u7b49\u4e8e start \u548c end \u4e4b\u5dee\u7684\u7edd\u5bf9\u503c\u3002\u4f8b\u5982\uff0c\u5728 strvar.substring(0, 3) \u548c strvar.substring(3, 0) \u8fd4\u56de\u7684\u5b50\u5b57\u7b26\u4e32\u7684\u7684\u957f\u5ea6\u662f 3\u3002
\u793a\u4f8b
\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e86 substring \u65b9\u6cd5\u7684\u7528\u6cd5\u3002
function SubstringDemo(){
var ss; // \u58f0\u660e\u53d8\u91cf\u3002
var s = "The rain in Spain falls mainly in the plain..";
ss = s.substring(12, 17); // \u53d6\u5b50\u5b57\u7b26\u4e32\u3002
return(ss); // \u8fd4\u56de\u5b50\u5b57\u7b26\u4e32\u3002
}
\u53d6\u5b57\u7b26\u4e32\u540e3\u4f4d,\u4ee3\u7801:String s="12345";int n=3;String b=aa.substring(aa.length()-n,aa.length())\u3002
\u62d3\u5c55\u8d44\u6599\uff1a
Java\u662f\u4e00\u95e8\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\uff0c\u4e0d\u4ec5\u5438\u6536\u4e86C++\u8bed\u8a00\u7684\u5404\u79cd\u4f18\u70b9\uff0c\u8fd8\u6452\u5f03\u4e86C++\u91cc\u96be\u4ee5\u7406\u89e3\u7684\u591a\u7ee7\u627f\u3001\u6307\u9488\u7b49\u6982\u5ff5\uff0c\u56e0\u6b64Java\u8bed\u8a00\u5177\u6709\u529f\u80fd\u5f3a\u5927\u548c\u7b80\u5355\u6613\u7528\u4e24\u4e2a\u7279\u5f81\u3002Java\u8bed\u8a00\u4f5c\u4e3a\u9759\u6001\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\u7684\u4ee3\u8868\uff0c\u6781\u597d\u5730\u5b9e\u73b0\u4e86\u9762\u5411\u5bf9\u8c61\u7406\u8bba\uff0c\u5141\u8bb8\u7a0b\u5e8f\u5458\u4ee5\u4f18\u96c5\u7684\u601d\u7ef4\u65b9\u5f0f\u8fdb\u884c\u590d\u6742\u7684\u7f16\u7a0b \u3002
Java\u5177\u6709\u7b80\u5355\u6027\u3001\u9762\u5411\u5bf9\u8c61\u3001\u5206\u5e03\u5f0f\u3001\u5065\u58ee\u6027\u3001\u5b89\u5168\u6027\u3001\u5e73\u53f0\u72ec\u7acb\u4e0e\u53ef\u79fb\u690d\u6027\u3001\u591a\u7ebf\u7a0b\u3001\u52a8\u6001\u6027\u7b49\u7279\u70b9\u3002Java\u53ef\u4ee5\u7f16\u5199\u684c\u9762\u5e94\u7528\u7a0b\u5e8f\u3001Web\u5e94\u7528\u7a0b\u5e8f\u3001\u5206\u5e03\u5f0f\u7cfb\u7edf\u548c\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5e94\u7528\u7a0b\u5e8f\u7b49\u3002
Java\u770b\u8d77\u6765\u8bbe\u8ba1\u5f97\u5f88\u50cfC++\uff0c\u4f46\u662f\u4e3a\u4e86\u4f7f\u8bed\u8a00\u5c0f\u548c\u5bb9\u6613\u719f\u6089\uff0c\u8bbe\u8ba1\u8005\u4eec\u628aC++\u8bed\u8a00\u4e2d\u8bb8\u591a\u53ef\u7528\u7684\u7279\u5f81\u53bb\u6389\u4e86\uff0c\u8fd9\u4e9b\u7279\u5f81\u662f\u4e00\u822c\u7a0b\u5e8f\u5458\u5f88\u5c11\u4f7f\u7528\u7684\u3002\u4f8b\u5982\uff0cJava\u4e0d\u652f\u6301go to\u8bed\u53e5\uff0c\u4ee3\u4e4b\u4ee5\u63d0\u4f9bbreak\u548ccontinue\u8bed\u53e5\u4ee5\u53ca\u5f02\u5e38\u5904\u7406\u3002
Java\u8fd8\u5254\u9664\u4e86C++\u7684\u64cd\u4f5c\u7b26\u8fc7\u8f7d\uff08overload\uff09\u548c\u591a\u7ee7\u627f\u7279\u5f81\uff0c\u5e76\u4e14\u4e0d\u4f7f\u7528\u4e3b\u6587\u4ef6\uff0c\u514d\u53bb\u4e86\u9884\u5904\u7406\u7a0b\u5e8f\u3002\u56e0\u4e3aJava\u6ca1\u6709\u7ed3\u6784\uff0c\u6570\u7ec4\u548c\u4e32\u90fd\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u6307\u9488\u3002Java\u80fd\u591f\u81ea\u52a8\u5904\u7406\u5bf9\u8c61\u7684\u5f15\u7528\u548c\u95f4\u63a5\u5f15\u7528\uff0c\u5b9e\u73b0\u81ea\u52a8\u7684\u65e0\u7528\u5355\u5143\u6536\u96c6\uff0c\u4f7f\u7528\u6237\u4e0d\u5fc5\u4e3a\u5b58\u50a8\u7ba1\u7406\u95ee\u9898\u70e6\u607c\uff0c\u80fd\u66f4\u591a\u7684\u65f6\u95f4\u548c\u7cbe\u529b\u82b1\u5728\u7814\u53d1\u4e0a\u3002
\u53c2\u8003\u8d44\u6599\uff1a
Java\u2014\u767e\u5ea6\u767e\u79d1
写一个参考吧：
String getStr = str.substring(str.length()-6,str.length());
String getStr = str.substring(5,11);
绛旓細Substring()鍑芥暟鐨勭敤娉 鐢ㄩ斺:鍙栧緱瀛楃涓蹭腑鐨勪竴閮ㄥ垎,(涔熷氨鏄鍙栧瓧绗︿覆涓殑瀛愪覆/);Using System;Namespace ConsoleApplication3 { class program { Static void Main(){ String Mystring = 鈥済ood good study,day day up鈥;//substring 鍦╟#涓湁涓や釜閲嶈浇鍑芥暟锛屽垎鍒涓嬨係tring substring1 = My...
绛旓細1. string str1 = "qqq,123,234,345,567";string str2 = "123,";str1 = str1.Remove(4, str2.Length);2. string str1 = "qqq,123,234,345,567";string str2 = "123,";str1 = str1.Replace(str2, "");3.娌＄湅鎳備綘鎯宠〃杈剧殑鎰忔 ...
绛旓細c#鑾峰彇string鐨勬煇涓瓧绗︽渶鍚庝竴浣嶇殑浣嶇疆锛氭姤鍛婃寚瀹氱殑 Unicode 瀛楃鎴 String 鍦ㄦ瀹炰緥涓殑鏈鍚庝竴涓尮閰嶉」鐨勭储寮曚綅缃傚悕绉拌鏄 锛歋tring.LastIndexOf (Char) 鎶ュ憡鎸囧畾 Unicode 瀛楃鍦ㄦ瀹炰緥涓殑鏈鍚庝竴涓尮閰嶉」鐨勭储寮曚綅缃係tring.LastIndexOf (String) 鎶ュ憡鎸囧畾鐨 String 鍦ㄦ瀹炰緥鍐呯殑鏈鍚庝竴涓尮閰嶉」鐨...
绛旓細string str = "abcdefg";string whatYouWanted = str.Substring(0,1);//杩欓噷灏辨槸灏哠tring浠庣0涓储寮曞紑濮嬶紝鍙栧嚭闀垮害涓1鐨勪竴涓猄tring
绛旓細鐢╯plit(String regex, int limit)姣斿浣犵殑S1鍙互杩欐牱 String newS1 = S1.split("-",3) [2]split鍒嗗壊鍑烘潵鐨勬槸瀛楃涓叉暟缁勶紝閭ｄ釜3琛ㄧず鍒嗗壊锛3-1锛夋锛屽叿浣撴枃妗ｅ涓
绛旓細var str = "(12px;122px)";var str1 = str.substring(1,str.length-1);//鍙栨嫭鍙烽噷鐨勫瓧绗︿覆 var strs = str1.split(';');//鏍规嵁";"鏉ュ垎鍓叉垚鏁扮粍寰楀埌鐨勬槸{'12px','122px'} var n1 = strs[0].substring(0,strs[0].length-2);//鍙栦笅鏍囦负0鐨勬暟缁剆trs鐒跺悗鏍规嵁substring鍙栧緱px鍓...
绛旓細string B = "abcdefg";string A = B.Substring(B.Length - 1, 1);Console.WriteLine("鏈鍚庣殑瀛楃鏄瘂0}",A);
绛旓細/ 淇濊瘉閭鍦板潃姝ｇ‘鎻愬墠涓嬶紝鍙栧緱閭鍦板潃鐨勭敤鎴峰悕鍜屽煙鍚嶅瓧绗︿覆 author 鏋佷箰楦焜ileniao.net version 01-00 since 01-00 / public class test { public static void main(String args[]) { // 瀹氫箟閭鍦板潃鐨勫瓧绗︿覆 String mail = "[email protected]";// 浣跨敤split() 鏂规硶鎶 @ 鍙峰乏鍙抽儴鍒嗗垎寮骞...
绛旓細string SForward = "";//瀹氫箟鏈鍓嶄负N涓暟瀛 string SMid = ""; //瀹氫箟涓棿N涓瓧姣 string name1= name.Substring(0,name.Length-6);//寰楀埌鍓嶅崐閮ㄥ垎 byte[] s =ascii.GetBytes(name1); //灏嗗墠鍗婇儴鍒嗚浆鎹 for(int i=0;i<name1.Length;i++) //鍙栧緱鍓嶅崐鏁板瓧閮ㄥ垎ASCII { if ((...
绛旓細4銆佹簮鏂囦欢鍚嶏細婧愭枃浠跺悕蹇呴』鍜岀被鍚嶇浉鍚屻傚綋淇濆瓨鏂囦欢鐨勬椂鍊欙紝浣犲簲璇浣跨敤绫诲悕浣滀负鏂囦欢鍚嶄繚瀛橈紙鍒囪Java鏄ぇ灏忓啓鏁忔劅鐨勶級锛屾枃浠跺悕鐨勫悗缂涓.java銆傦紙濡傛灉鏂囦欢鍚嶅拰绫诲悕涓嶇浉鍚屽垯浼氬鑷寸紪璇戦敊璇級銆5銆佷富鏂规硶鍏ュ彛锛氭墍鏈夌殑Java 绋嬪簭鐢眕ublic static void main(String[]args)鏂规硶寮濮嬫墽琛屻
