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*1.5);
            // "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;
        }
        data[numItems]=d;
        numItems = numItems + 1;
    }
    
    public void insert ( int pos , int d ) {
	int[] tempArray = new int [ data.length + 1 ];
	int i = 0;
	while ( i < pos ) {
	    tempArray [ i ] = data [ i ];
	    i = i + 1;
	}
	tempArray [ i ] = d;
	i = i + 1;
	while ( i < data.length + 1 ) {
	    tempArray [ i ] = data [ i - 1 ];
	    i = i + 1;
	}
	data = tempArray;
    }

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