The only difference between StringBuffer and StringBuilder is StringBuffer is thread-safe, that is StringBuffer is synchronized. whereas StringBuilder is NOT thread-safe, that is StringBuilder is NOT ...

When creating an instance of the String class by assigning its reference to a literal, the latter is placed in the so-called "pool of literals". If in the future another reference to a literal ...

The characters in a string have indices that run from 0 to string.length() - 1. The method charAt() returns the character at a specified index. The boolean operator ( == ) returns true only if the two ...