nd4j-common/src/main/java/org/nd4j/util/StringUtils.java
public static Collection<String> getStringCollection(String str){
        String delim = ",";
        return getStringCollection(str, delim);
    }
public static Collection<String> getStringCollection(String str){
        String delim = ",";
        return getStringCollection(str, delim);
    }
Returns a collection of strings.
@param str comma separated string values
@return an <code>ArrayList</code> of string values