Java string

A Java string is a sequence of characters that exist as an object of the class java.lang. Java strings are created and manipulated through the string class. Once created, a string is immutable -- its value cannot be changed.

Methods of class String enable:

• Examining individual characters in the string.
• Comparing strings.
• Searching strings.
• Copying strings with characters converted from upper to lower case or vice versa.

Strings can be created simply. For example:

String greeting = "Hello world!";

"Hello world!" in that example is a string literal, defined by the double quotes, which means that the compiler will create an object with that value.

See a tutorial on creating and using strings in Java: