Chinese Charactor sorting in List using Comparator and Collator

Question

I've used Collator.sort method with Locale.TRADITIONAL_CHINESE Locale to sort an ArrayList which contains a list of Chinese charactor. But it seems that the ordering is not based on stroke.
Here is the coding for compare methods whose class implements java.util.Comparator
     public int compare(Object obj1, Object obj2){
          String string1 = (String)obj1;
          String string2 = (String)obj2;
          int compareResult = 0;
          Locale locale = locale = Locale.TRADITIONAL_CHINESE;
          Collator collator = Collator.getInstance(locale);
          compareResult = collator.compare(string1, string2);
          return compareResult;
Could any one have exprience on it???
Thanks,

Answer 1

The resulted sequence
"\u59cb\u6587\u65bc\u6709\u6c0f\u6f22\u7136\u7565\u7fa9\u800c\u81f3\u8a31\u8aaa\u91cd\u97f3"follows the traditional ordering of the Kangxi radicals within the limit of CJK Unified Ideographs.
The following may be more flexible.
import java.util.*;
import java.io.*;
import java.text.*;
public class CharSort implements Comparator{
java.text.RuleBasedCollator collator; // you can set your rules for the instance "collator"
CharSort(){
  collator = (RuleBasedCollator)java.text.Collator.getInstance(java.util.Locale.TAIWAN);//try testing various locales
public void doSort(String str) throws java.io.IOException{
java.text.CollationKey[] keys = new java.text.CollationKey[str.length()];
for(int i=0;i<keys.length;i++){
     keys[i] = collator.getCollationKey(str.substring(i,i+1));
java.util.Arrays.sort(keys, this);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("cjk.txt"), "UTF8"));
for(int i=0;i<keys.length;i++){
         bw.write(keys.getSourceString());
bw.newLine();
bw.close();
public int compare(Object c1, Object c2) throws IllegalArgumentException{
if((c1 instanceof CollationKey) &&(c2 instanceof CollationKey)){
return collator.compare(((CollationKey)c1).getSourceString(), ((CollationKey)c2).getSourceString());
}else throw new IllegalArgumentException();
public boolean equals(Object c1, Object c2){
if(this.compare(c1,c2)==0) return true;
else return false;
public static void main(String[] args) throws java.lang.Exception{
CharSort chSort = new CharSort();
String str = "\u81f3\u6f22\u8a31\u6c0f\u59cb\u6709\u8aaa\u6587\u7136\u91cd\u7fa9\u800c\u7565\u65bc\u97f3";
chSort.doSort(str);