is
Tests whether the specified string can be encoded as a segment in alphanumeric mode. A string is encodable iff each character is in the following set: 0 to 9, A to Z (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
Return
true iff each character is in the alphanumeric mode character set
Parameters
text
the string to test for encodability (not null)
See also
.makeAlphanumeric
Throws
if the string is null