Thread: not able to remove from ArrayList

Hi,
I am trying to remove an object from a array list by passing in the object to be removed.
I have a equals method as well. But somehow its not woking. The equals method is not getting picked.
Please suggest whats wrong

Heres my code:

import java.util.*;
class Dummy
{
	int x;
	Dummy(int y)
	{
		x=y;
	}
	public boolean equals(Dummy o)
	{
		if(o.x==this.x)
			return true;
		return false;
	}
	public String toString()
	{
		return Integer.toString(x);
	}
}
class CollTest {
public static void main(String args[]) {
 
ArrayList al = new ArrayList();
System.out.println("Initial size of al: " +al.size());
 
// add elements to the array list
al.add(new Dummy(5));
al.add(new Dummy(6));
al.add(new Dummy(7));
 
System.out.println("Size of al after additions: " +al.size());
// display the array list
System.out.println("Contents of al: " + al);
 
// Remove elements from the array list
al.remove(new Dummy(5));
System.out.println("Size of al after deletions: " +al.size());
System.out.println("Contents of al: " + al);
}
}

Output is:
Initial size of al: 0
Size of al after additions: 3
Contents of al: [5, 6, 7]
Size of al after deletions: 3
Contents of al: [5, 6, 7]

Thanks alot..
did a dumb thing by using Dummy

public boolean equals(Dummy o)

Object.equals() was getting picked and not this.