Java Programming

This is my program, when it gets to the exit command y, or no, it totally skips the whole procedure, can you please help. Thank you in advance

here is my code

Line: -----
import java.util.*;

public class amazingdawg{
public static void main(String[] args) {	
final int minheight = 1;
final int maxheight = 20;
int choice,height,tr1,tr2,tr3,tr4;
String y="y";

Scanner in = new Scanner(System.in);

while ((y.equals("y"))||(y.equals("Y"))){

System.out.print("Enter your choice (1-4): ");
choice = in.nextInt();
while(choice < 1 || choice > 4) {
System.out.print("Enter your choice (1-4): ");
choice = in.nextInt();
}

System.out.print("Enter the height: ");
height = in.nextInt();

while(height < minheight || height > maxheight) {
System.out.print("Enter the height: ");
height = in.nextInt();
}

switch(choice) {
case 1 : System.out.println ("Here is the triangle: \n"); 
for (int i = 1; i <= height; i++)
     {   System.out.print("*");
      
      for (int k =2; k <= i; k++)
     {   System.out.print("*"); 
      
      }System.out.println();
      }
       break;
case 2 : System.out.println ("Here is the triangle: \n");

for (int i = 1; i <= height; i++){
	System.out.print("*");
      
    for (int k =(height-1); k >= i; k--){ 
     System.out.print("*"); 
      
      }System.out.println();
}
 break;
case 3 : System.out.println ("Here is the triangle: \n");
for (int i = height; i > 0; i--)
              {
                for (int j = i; j > 0; j--)
                {
                  System.out.print(" ");
                }
                for (int k = height; k >= i; k--)
                {
                  System.out.print ("*");
                }
                System.out.println ();
              }
               break;
case 4 : System.out.println ("Here is the triangle: \n");
   for (int i = 1; i <= height; i++)
        {
          for (int j = height; j > i; j--)
          {
            System.out.print(" ");
          }
          System.out.print("*");
          for (int a = 1; a < i; a++)
          {
            System.out.print("*");
          }
          for (int c = 1; c < i; c++)
          {
            System.out.print("*");
          }
          System.out.println();
        }
         break;
}
System.out.print ("Would you like to exit (Y or N): ");
y=in.nextLine();

if ((y.equals("n")) || (y.equals("N"))){
	System.out.println ("Thank you for using Triangle Generator.  Good Bye!!");
}else{
	System.out.println("WTF ENTER SOMETHING!!");
}

}
}
}

THE END PART IS WHERE IT SKIPS

Edited by: vertozia on Oct 28, 2007 11:50 AM