myList.java

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

public class myList{
    private int[] data;
    private int numItems;

    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 String toString() {
	String s = Arrays.toString(data)+" : "+numItems;
	return s;
    }
	
    public void add(int pos, int d) {
	while (pos >= data.length){
	    grow();
	}
	for(int i = data.length-1;i>pos; i--){
	    data[i] = data[i-1];
	    //shift things down
	}
	data[pos] = d;
	if(pos>numItems){
	    numItems = pos;
	}
	else
	    numItems++;
    }

    public void remove(int pos) {
	if(pos < data.length-1){
	    for(int i = pos; i < data.length -1; i++){
		data[i] = data[i+1];
	    }
	    numItems--;
	}
    }

    public int size() {
	// return the number of items in the list
	return numItems;
	}

    public int get(int pos) {
        return data[pos];
	//return the item at pos
	}

    public int set(int pos, int d) {
	// change the item at pos to have the value d
	if (pos<data.length){
	    data[pos] = d;
	}
	else
	    add(pos,d);
	}
}