Run the program below (in the examples folder). From the output displayed, you will see that the remove method works differently depending on the base type of the ArrayList. Why?

import java.util.ArrayList;

class Strange

{

int x = 3;

}

class Main

{

public static void main(String[] args)

{

ArrayList ial = new ArrayList();

Integer i1 = new Integer(1);

Integer i2 = new Integer(1);

if(i1 == i2)

{

System.out.println("i1 == i2 is true");

}

else

System.out.println("I1 == I2 is false");

ial.add(i1);

ial.remove(i1);

System.out.println(ial.size());

ial.add(i1);

ial.remove(i2);

System.out.println(ial.size());

ArrayList ral = new ArrayList();

Strange r1 = new Strange();

Strange r2 = new Strange();

if(r1 == r2)

System.out.println("r1 == r2 is true");

else

System.out.println("r1 == r2 is false");

ral.add(r1);

ral.remove(r1);

System.out.println(ral.size());

ral.add(r1);

ral.remove(r2);

System.out.println(ral.size());

}

}