artloglaby/java/org/artisanlogiciel/lua/CharProvider.java

package org.artisanlogiciel.lua;

public class CharProvider {

    String input;
    int current;

    public CharProvider(String input) {
        this.input = input;
        current = 0;
    }

    public char getNextchar()
    {
        int i = current;
        if ( input.length() > current) {
            current++;
            return input.charAt(i);
        }
        else
        {
            return 0;
        }
    }

    public void pushBackChar(char c)
    {
        System.out.print('*');
        current--;
    }

}