Code example for ParsePosition

Methods: getIndex

        this.operatorStack = new Stack();
    public static boolean isNumeric(String str) {
        NumberFormat formatter = NumberFormat.getInstance();
        ParsePosition pos = new ParsePosition(0);
        formatter.parse(str, pos);
        return str.length() == pos.getIndex();
    public static boolean isOperator(String str) {
        ArrayList<String> operatorList = Operator.getOperatorSymbols();
        return (operatorList.contains(str));
    public static boolean isLeftParenthesis(String str) {
        return str.equals("(");
    public static boolean isRightParenthesis(String str) {
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