Java String indexOf


The java string indexOf() method returns index of given character value or substring. If it is not found, it returns -1. The index counter starts from zero.


Signature

There are 4 types of indexOf method in java. The signature of indexOf methods are given below:

No Method Description
1 int indexOf(int ch) returns index position for the given char value
2 int indexOf(int ch, int fromIndex) returns index position for the given char value and from index
3 int indexOf(String substring) returns index position for the given substring
4 int indexOf(String substring, int fromIndex) returns index position for the given substring and from index


Parameters

ch: char value i.e. a single character e.g. 'a'

fromIndex: index position from where index of the char value or substring is retured

substring: substring to be searched in this string


Returns

It doesn't return any value.

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