StringUtil.listToString(List list, char separator)

public class StringUtil {

    @SuppressWarnings("rawtypes")
    public static String listToString(List list, char separator) {
        StringBuilder sb = new StringBuilder();
        if(list!=null){
            if(list.size()>0){
                sb.append(list.get(0));
            }
            for (int i = 1; i < list.size(); i++){
                sb.append(separator).append(list.get(i));
            }        
        }
        return sb.toString();
    }
    
}