'hello world hello'.indexOf('world', 12) returns -1 - because, while it's true the substring world occurs at index 6, that position is not greater than or equal to 12. indexOf(String str): Returns the index of the first occurrence of the specified substring within this string.This method may be used to trim whitespace (as defined above) from the beginning and end of a string. Java String indexOf() Method example: The method indexOf() is used for finding out the index of the specified character or substring in a given string. 'hello world hello'.indexOf('o', -5) returns 4 - because it causes the method to behave as if the second argument were 0, and the first occurrence of o at a position greater or equal to 0 is at position 4. A String object is returned, representing the substring of this string that begins with the character at index k and ends with the character at index m -that is, the result of this.substring (k, m + 1).If position is less than zero, the method behaves as it would if position were 0. indexOf() method is a way of finding the index of the first occurrence of a character or a string. If position is greater than the length of the calling string, the method doesn't search the calling string at all. The method returns the index of the first occurrence of the specified substring at a position greater than or equal to position, which defaults to 0. All values are coerced to strings, so omitting it or passing undefined causes indexOf() to search for the string "undefined", which is rarely what you want. Object.prototype._lookupSetter_() Deprecated.
Object.prototype._lookupGetter_() Deprecated indexOf(String substring): This method returns the index of the first character of the specified substring within the string.In this tutorial, we will learn about the IndexOf() java. Object.prototype._defineSetter_() Deprecated The indexOf java method returns the index of a particular character or substring in a string.Object.prototype._defineGetter_() Deprecated The Java string indexOf method is a function that is used to get the integer value of a particular index of String type object, based on a criteria.
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