A DESCRIPTION OF THE REQUEST :
Charset.availableCharsets() returns completely initialized charset, which is an expensive operation.

I propose to additionally provide a set/list which only contains the names of the supported charsets.

JUSTIFICATION :
Charset.availableCharsets() is an performance and memory expensive operation.

In many cases just providing the names should suffice.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
provides a list/set of names, optionally including all aliases, of supported charsets.

---------- BEGIN SOURCE ----------
public class Charset {
    /**
     * Returns a list of the names of currently available charsets
     * with or without valid aliases in case insensitive order.
     */
    public static List<String> supportedCharsets(boolean withAliases);
    /**
     * Returns a list of arrays containing the aliases of currently available charsets
     * in same order than canonical names without aliases from supportedCharsets.
     */
    public static List<String[]> supportedAliases();
    ...
}

---------- END SOURCE ----------