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.
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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 .
Read moreHow do you find a string inside a string?
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.
Read moreDoes == compare string?
equals(Object other) function to compare strings, not the == operator . The function checks the actual contents of the string, the == operator checks whether the references to the objects are equal.
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To compare these strings in Java, we need to use the equals() method of the string. You should not use == (equality operator) to compare these strings because they compare the reference of the string , i.e. whether they are the same object or not.
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Java String compare. We can compare String in Java on the basis of content and reference . It is used in authentication (by equals() method), sorting (by compareTo() method), reference matching (by == operator) etc.
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