How to use indexOf Java?
– Syntax – The syntax of Java String indexOf () Method is: – Java indexOf () Parameters – Java String indexOf () Return Value. This indexOf () Java String method returns the index within this string of the first occurrence of the specified character. – IndexOf (char b) This method returns the index of the character ‘b’ passed as parameter. If that character is not available in the string, the returned index would be -1. – IndexOf (char c, int startindex) The given method would return the index of the first occurrence of character ‘c’ after the integer index passed as second parameter “startindex.” – IndexOf (String substring) The above Java substring indexOf () method returns the index of the first character of the substring passed as a parameter to it. – IndexOf (String substring, int startindex) This Java substring indexOf () method returns the index of the first character in the substring passed as the first parameter, after the “startindex” index – Java String indexOf () Method example – Output:
How do substrings work in Java?
The characters of a String in Java are stored as a char[] (Character Array). When a substring is called on a particular String, it extracts the value of startIndex and the length of the substring that needs to be extracted from the startIndex. After identifying the from and to, it internally invokes Arrays.copyOfRange.
What is the index of a string in Java?
Java String indexOf () Method Definition and Usage. The indexOf () method returns the position of the first occurrence of specified character (s) in a string. Syntax Parameter Values Technical Details More Examples
What is the indexOf function in JavaScript?
Definition and Usage. The indexOf () method returns the position of the first occurrence of a specified value in a string.