Method back

src/main/java/com/volmit/adapt/util/JSONTokener.java:100–108

Back up one character. This provides a sort of lookahead capability, so that you can test for a digit or letter before attempting to parse the next number or identifier.

()

     * next number or identifier.
     */
    public void back() throws JSONException {
        if (this.usePrevious || this.index <= 0) {
            throw new JSONException("Stepping back two steps is not supported");
        }
        this.index -= 1;
        this.character -= 1;
        this.usePrevious = true;
        this.eof = false;
    }

    public boolean end() {
        return this.eof && !this.usePrevious;