Java Programming

Folks,

Is Doc Jam in da' house?

I'm trying to remove duplicate points (ie: zero-length-lines) from the Well Known Text representation of various geometries.

I think this code is "fairly close" to what I'm after... but no bananas yet

import java.util.regex.Pattern;
import java.util.regex.Matcher;

class KrcHarness
{
    /**
     * removeDuplicatePointsFromWkt
     *
     * @param actualWkt String
     * @return String
     */
    private static String removeDuplicatePointsFromWkt(String wkt) {
        Pattern pattern = Pattern.compile("(\\d+(\\.\\d+)? -\\d+(\\.\\d+)?( \\d+(\\.\\d+)?)?,)\\1");
        while(true) {
            Matcher matcher = pattern.matcher(wkt);
            if(!matcher.find()) break;
            String group = matcher.group();
            String replacement = group.substring(0,group.indexOf(",")+1);
            wkt = matcher.replaceAll(replacement);
            System.out.println("DEBUG: group=\""+group+"\", replacement=\""+replacement+"\", wkt=\""+wkt+"\"");
        }
        return wkt;
    }

    public static void main(String[] args) {
        String actual = "MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150 -15.05,150 -15,150 -15,150.35 -15.35,150.35 -15,150.35 -15,150.4 -15)))";
        System.out.println("actual   : "+actual);
        System.out.println("clean    : "+removeDuplicatePointsFromWkt(actual));
    }

}

I get the output

actual   : MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150 -15.05,150 -15,150 -15,150.35 -15.35,150.35 -15,150.35 -15,150.4 -15)))
DEBUG: group="150 -15.05,150 -15.05,", replacement="150 -15.05,", wkt="MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150 -15.05,150.35 -15.35,150 -15.05,150.4 -15)))"
DEBUG: group="150 -15.05,150 -15.05,", replacement="150 -15.05,", wkt="MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150.35 -15.35,150 -15.05,150.4 -15)))"
clean    : MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150.35 -15.35,150 -15.05,150.4 -15)))

I need the output
Actual : MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150 -15.05,150 -15,150 -15,150.35 -15.35,150.35 -15,150.35 -15,150.4 -15)))
===================== =============== =====================
manual : MULTIPOLYGON (((150.4 -15,150.4 -15.45,150 -15.05,150 -15,150.35 -15.35,150.35 -15,150.4 -15)))


I don't understand why it's find the same string twice, and why it doesn't find the second & third repeated-group. I must be missing something basic.

Please Does anyone know how to remove a series of repetitions from a string?

Thanx for any help... Keith.