6 Which classes in the Java standard library work with strings? The StringBuilder and StringBuffer classes are "twins" and are close to the String class in their purpose, but unlike the latter, the ...

In Java, a String is a sequence of characters that represents text. It is an immutable class, meaning that once a String object is created, its value cannot be changed.

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 ...