exo1: rename an attribute.

[Project_POO.git] / exo1 / Pile.java

import java.lang.reflect.Array;

/**
 *
 */
public class Pile<E> {
    private E[] array;
    private int array_size;
    private int head_index;

    /**
     * set the size of the internal array
     * @param int size the size of the array
     */
    public void setSize(int size) {
        array_size = size;
    }

    /**
     * get the size of the internal array
     * @return the integer size of the internal array
     */
    public int getSize() {
        return array_size;
    }

    /**
     * set the stack head index
     * @param int index the stack head index
     */
    public void setHeadIndex(int index) {
        head_index = index;
    }

    /**
     * get the stack head current index
     * @return the integer stack head index
     */
    public int getHeadIndex() {
        return head_index;
    }

    /**
     * [Pile description]
     * @param int size [description]
     */
    @SuppressWarnings("unchecked")
    Pile(int size) {
        array = (E[])new Object[size];
        setSize(size);
        setHeadIndex(0);
    }

    /**
     * [Pile description]
     * @param int size [description]
     */
    @SuppressWarnings("unchecked")
    Pile(Class<E[]> cl, int size) {
        array = (E[])Array.newInstance(cl, size);
        setSize(size);
        setHeadIndex(0);
    }

    /**
     * [empiler description]
     * @param int value [description]
     */
    public void empiler(E value) {
        if (!plein()) {
            array[head_index] = value;
            head_index++;
        } else {
            System.out.println("La pile est pleine");
        }
    }

    /**
     * [depiler description]
     * @return [description]
     */
    public E depiler() {
        if (!vide()) {
            head_index--;
            return array[head_index];
        } else {
            return null;
        }
    }

    /**
     * [plein description]
     * @return [description]
     */
    private boolean plein() {
        return (getHeadIndex() >= getSize());
    }

    /**
     * [vide description]
     * @return [description]
     */
    private boolean vide() {
        return (getHeadIndex() == 0);
    }

    /**
     * [afficher description]
     */
    public void afficher() {
        for (int i = 0; i < getHeadIndex(); i++) {
            System.out.println("element " + i + " " + array[i]);
        }
    }

}