myList.java

import java.io.*;
import java.util.*;


public class myList implements myMadeUpInterface, Iterable<Integer> {

    private class myListIterator implements Iterator<Integer> {
	private int current = 0;
	private myList list;

	public myListIterator(myList l) {
	    list = l;
	}

	public boolean hasNext() {
	    return (current<list.size());
	}
	public Integer next() {
	    current++;
	    return ((Integer)list.get(current-1));
	}
	public void remove() {
	    list.remove(current);
	}
    }
    

    private int[] data;
    private int numItems;
    
    public Iterator<Integer> iterator() {
	return new myListIterator(this);
    }


    public String saySomething() {
	return "Hello";
    }
    public int addOne(int z) {
	return z-1;
    }

    public myList() {
	data = new int[5];
	numItems=0;
    }

    public boolean isFull() {
	return numItems >= data.length;
    }

    public void grow() {
	    // "grow" the array by creating a new one and copying over
	    int[] tmpArray = new int[data.length+data.length/2];
	    for (int i=0;i<data.length;i++) 
		tmpArray[i]=data[i];
	    data = tmpArray;
    }

    public void add(int d) {
	if (isFull()){
	    grow();
	}
        data[numItems]=d;
        numItems = numItems + 1;
    }

    public void add(int pos, int d) {
	if (isFull()) 
	    grow();
	
	// shift things over to make room
	for (int i=numItems;i>=pos;i--) {
	    data[i]=data[i-1];
	}
	data[pos]=d;
	numItems++;
    }
    
    public void remove(int pos) {
	for (int i=pos; i< numItems;i++) 
	    data[i]=data[i+1];
	numItems--;
    }


    public int get(int pos) {
	return data[pos];
    }

    public void set(int pos, int d) {
	data[pos]=d;
    }

    public int size() {
	return numItems;
    }

    public String toString() {
	String s = Arrays.toString(data)+" : "+numItems;
	return s;
    }
	
}