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 void add(int d) {
        if (numItems>=data.length) {
            System.out.println("Growing from " + data.length + 
                               " to " + data.length*3/2);
            int[] tmpArray = new int[data.length+data.length/2];
            for (int i=0;i<data.length;i++) 
                tmpArray[i]=data[i];
            data = tmpArray;
        }
        data[numItems]=d;
        numItems = numItems + 1;
    }
    
    public String toString() {
        String s = Arrays.toString(data)+" : "+numItems;
        return s;
    }

    public void insert(int pos, int d) {
        add(data[numItems-1]);
        for(int i=numItems-1; i>pos; i--)
            data[i]=data[i-1];
        data[pos]=d;
    }
        
    public void remove(int pos) {
        for(int i=pos;i<numItems;i++)
            data[i]=data[i+1];
        numItems== numItems - 1 ;
    }
}