Java gives you the ability to dynamically create strings. Even after you set the string value, you can add more characters to the string value throughout the code. This process lets you build a string ...

Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Note: You may assume the string contain only lowercase letters.

In Java, string is basically an object that represents sequence of char values. An array of characters works same as Java string. Java String class provides a lot of methods to perform operations on ...

A few years ago I wrote a Soduko solver in Java. Works great, except I have to edit the source file to change the input because I could never get Swing to work like my mental model said it should. Cut ...