static String valueOf(char[] chs):将字符数组转换成字符串static String valueOf(int i):将整数转换成字符串String toLowerCase():将字符串所有字符小写String toUpperCase():将字符串所有字符大写String concat(String str):字符串拼接1 2 3 4 5 6 7
int firstListItem = stringOne.indexOf("<LI>"); int secondListItem = stringOne.indexOf("<LI>", firstListItem + 1); Serial.println("The index of the second list tag in the string " + stringOne + " is " + secondListItem); // lastIndexOf() gives you the last occurrence of a char...
IndexOf(String, Int32, Int32, StringComparison) Reports the zero-based index of the first occurrence of the specified string in the current String object. Parameters specify the starting search position in the current string, the number of characters in the current string to search, and the ...
IndexOf(String, Int32, Int32, StringComparison) Gibt den NULL-basierten Index des ersten Vorkommens der angegebenen Zeichenfolge im aktuellen String-Objekt an. Parameter geben die Anfangssuchposition in der aktuellen Zeichenfolge, die Anzahl der Zeichen in der aktuellen Zeichenfolge und den ...
String 类 C#中的IndexOf方法区分大小写。但是,您可以使用CompareInto类使其对大小写不敏感。 代码如下: stringfirstString ="What a day this has been!";stringsecondString ="Day"; CompareInfo sampleCInfo=CultureInfo.InvariantCulture.CompareInfo;intindex = sampleCInfo.IndexOf(firstString, secondString, ...
这时候你需要把s转换成string才可以运行。如以上回答未解决问题，请尝试：var parr = ["a","b","c","d"];判断parr 数组中是否存在a parr.indexOf("a")==-1 在ie8下会提示对象不支持indexOf属性或方法 解决办法：用jquery里的$.inArray替代indexOf .inArray(“a”, parr)==-1 ...
String str1 ="Learn Java";intresult;// getting index of character 'J'result = str1.indexOf('J'); System.out.println(result);// 6// the first occurrence of 'a' is returnedresult = str1.indexOf('a'); System.out.println(result);// 2// character not in the stringresult = str1...
In this example, we'll search for the first occurrence of the word "JavaScript" in a string. const str = "JavaScript is a programming language. JavaScript is widely used for web development."; const index = str.indexOf("JavaScript"); console.log(index); // Output: 0 As we can see,...
public intlastIndexOf(String str) 参数:此方法仅接受一个参数str,它是String类型的值,它指向我们要获取的最后一次出现的索引的String。 返回值:此方法返回最后一次传递的子字符串的索引;如果不存在此子字符串,则返回-1。 以下程序说明了java.lang.StringBuffer.lastIndexOf()方法: ...
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