datos alfanuméricos. String, char... ¿más?

[Xerelo]

Deberías leer esto

https://docs.oracle.com/javase/tutor...datatypes.html

Este tipo de preguntas las puedes resolver tú mismo con una búsqueda rápida

https://docs.oracle.com/javase/7/doc...t/Charset.html

Y no, no hay nada para texto que ocupe menos que el String.

http://www.cs.lafayette.edu/docs/jav.../intl/faq.html

How is text represented in the Java platform?

The Java programming language is based on the Unicode character set, and several libraries implement the Unicode standard. The primitive data type char in the Java programming language is an unsigned 16-bit integer that can represent a Unicode code point in the range U+0000 to U+FFFF, or the code units of UTF-16. The various types and classes in the Java platform that represent character sequences - char[], implementations of java.lang.CharSequence (such as the String class), and implementations of java.text.CharacterIterator - are UTF-16 sequences.