Extract service from input string

filterbyRegex.java

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

//Example Input Strings
//String filterby = [ "13|123.12|123.service|1.12|123.service|2", "service|1.12|123.service|2", "service|1.service|2", "13|123.12|123.12|123", "13|123", "service|1" ]

//Filter services from filterby
String[] results = filterby.split("\\.?service\\|\\d+");
StringBuilder sb = new StringBuilder();
for( String result in results) {
    sb.append(result);
}
String Result = sb.toString().replaceAll("(^\\.|\\.$)","");

//Extract services
final Pattern servicePattern = Pattern.compile("\\.?service\\|(\\d+)");
Matcher m = servicePattern.matcher(filterby);
String services = "";

while(m.find()) {
    if ( services.length() == 0 )
        services += m.group(1);
    else
        services += "|"+m.group(1);
}