Name: laC46010 Date: 10/19/97



String comparison using Collator.getCollationKey() and Collator.compare()
produces different results when compared strings contain ignorable strings.

For example, Collator.compare() treats the following strings as equal to
empty string "" :
"\u200b", "\u200c", "\u200d", "\u200e", "\u200f", "\u0000", "\u0001",
"\u0002", "\u0003", "\u0004", "\u0005", "\u0006", "\u0007", "\u0008",
"\u000e", "\u000f", "\u0010", "\u0011", "\u0012", "\u0013", "\u0014",
"\u0015", "\u0016", "\u0017", "\u0018", "\u0019", "\u001a", "\u001b",
"\u001c", "\u001d", "\u001e", "\u001f", "\u007f", "\u0080", "\u0081",
"\u0082", "\u0083", "\u0084", "\u0085", "\u0086", "\u0087", "\u0088",
"\u0089", "\u008a", "\u008b", "\u008c", "\u008d", "\u008e", "\u008f",
"\u0090", "\u0091", "\u0092", "\u0093", "\u0094", "\u0095", "\u0096",
"\u0097", "\u0098", "\u0099", "\u009a", "\u009b", "\u009c", "\u009d",
"\u009e", "\u009f".

At the same time Collator.getCollationKey() produces different keys
for these strings and considers them to be unequal to empty string.

See also an example below:
--------------output----------------
failed:Collator.compare: 0 CollationKey.compareTo: -1

--------------CollationKey_fails.java--------------------
import java.util.Locale;
import java.text.Collator;
import java.text.CollationKey;

class CollationKey_fails {

    public static void main(String argv[]) {
Collator coll = Collator.getInstance(new Locale("en", "US"));
CollationKey key, key1;

coll.setStrength(Collator.TERTIARY);
key = coll.getCollationKey("123");
key1 = coll.getCollationKey( "123\u008b");
if (coll.compare("123", "123\u008b") != key.compareTo(key1)) {
System.out.println("failed:Collator.compare: " +
coll.compare("", "\u008b") +
" CollationKey.compareTo: " +
key.compareTo(key1));
} else {
System.out.println("OK");
}
    }
}
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