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) {
	// to be completed by you
	// inserts the value d at location (index) pos)
	// recall the algorithm we developed in calss:
	// 1. Grow if needed
	// 2. shift everything past the insertion point down
	// 3. add the new item
	// 4. numitems++
	int[] tempArray;
	if (pos > data.length+1) {
	    tempArray = new int[pos+1];
	    for (int i=0; i<data.length; i++) {
		tempArray[i] = data[i];}
	    tempArray[pos] = d;
	    data = tempArray;
	}	    
	else {
	    grow();
	    for (int i=numItems-1; i>=pos; i--) {
		data[i+1] = data[i];}
	    data[pos] = d;
	}
	numItems++;
    }
    
    public int size() {
	// return the number of items in the list
	return numItems;
    }
    
    public int get(int pos) {
	//return the item at pos;
	return data[pos];
    }
 
    public int set(int pos, int d) {
	// change the item at pos to have the value d
	data[pos] = d;
	return d;}
}