12.4 A Note on Java and Unicode

This library uses Java’s built-in ’char’ datatype. Up to Java 1.4, this datatype only supports 16-bit Unicode code points, also called the Basic Multilingual Plane. For this reason, this library doesn’t work for Supplementary Characters (i.e. characters from U+10000 to U+10FFFF). All references to such characters are silently ignored.

Starting from Java 1.5, also Supplementary Characters will be supported. However, this will require changes in the present version of the library. Java 1.5 is currently in beta status.

For more information refer to the documentation of java.lang.Character in the JDK API.

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