How do you find a string inside a string?

You can search for a particular letter in a string using the indexOf() method of the String class . This method which returns a position index of a word within the string if found. Otherwise it returns -1.

Use String contains() Method to Check if a String Contains Character. Java String’s contains() method checks for a particular sequence of characters present within a string. This method returns true if the specified character sequence is present within the string, otherwise, it returns false .

JAVA Program

Simple Approach: The idea is to run a loop from start to end and for every index in the given string check whether the sub-string can be formed from that index . This can be done by running a nested loop traversing the given string and in that loop run another loop checking for sub-string from every index.