Thread: User defined classes and loops

My code all works fine and I have a user defined class called Circle. When I type "y" or "Y" it will not re run the program.

import java.util.Scanner;
public class CircleTest
{
    public static void main (String [] args)
    {
        String choice;
        do{
 
            Circle crcl1 = new Circle(5.5);
            Scanner scan = new Scanner(System.in);
            System.out.println("Please enter the radius of the circle: ");
            crcl1.setRadius(scan.nextDouble());
 
            System.out.println("\nThe radius of the circle is " + crcl1.getRadius());
            System.out.println("\nThe area of the circle is " + crcl1.getArea());
            System.out.println("\nThe perimeter of the circle is " + crcl1.getPerimeter());
 
            System.out.println("\n\nWould you like to perform another calculation? <Y for yes, N for no> ");
            choice = scan.next();
 
        }while(choice == "y" || choice == "Y");
    }
}

This is my user defined class:

public class Circle
{
    private double radius;
    private double area;
    private double perimeter;
    double PI = 3.14159;
 
    public Circle (double pRadius)
    {
        radius = pRadius;
    }
    public double getRadius()
    {
        return radius;
    }
    public double setRadius(double newRadius)
    {
        if(newRadius<0)
        {
            System.out.println("Radius cannot be negative.");
        }
        else
        {
            radius = newRadius;
        }
        return radius;
    }
    public double getArea()
    {
        area = PI * radius * radius;
        return area;
    }
    public double getPerimeter()
    {
        perimeter = 2 * PI * radius;
        return perimeter;
    }
}

I added the print out statement after the while statement and it did print what I input into choice onto the display. It just won't run the program again.