ICU collation test

collation.java

import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.text.Collator;

public class CollationDemo {

    private Collator collator;

    public static void main(String arg[]) {
        new CollationDemo().runDemo();
    }

    public void runDemo() {
        collator = Collator.getInstance();

        System.out.println(collationElement(UCharacter.toString(0x410) + UCharacter.toString(0x62)));
        System.out.println(collationElement(UCharacter.toString(0x430) + UCharacter.toString(0x306) + UCharacter.toString(0x334)));
    }

    public String collationElement(String str) {
        byte[] sortKey = collator.getCollationKey(str).toByteArray();

        return byteArrayToString(sortKey);
    }

    public String collationElement(int cp) {
        return collationElement(UCharacter.toString(cp));
    }

    public String byteArrayToString(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        String delim = "";

        for (int b : bytes) {
            sb.append(delim).append(Integer.toHexString(b & 0xFF));
            delim = ",";
        }

        return sb.toString();
    }

}