myList.java

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


public class myList implements myInterface,Iterable {

    private class myListIterator implements Iterator<Integer> {
		private myList list;
		private int current=0;
		public myListIterator(myList l) {
		    list = l;
		}
		public boolean hasNext() {
		    return (numItems > current);
		}
		public Integer next() {
		    current = current + 1;
		    return list.get(current - 1);
		}
		public void remove() {
		}
    }

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

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



    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;
    }
	
}