Assignment #97 and Area Calculator

Code

    ///Name: Tim Gibson
    ///Period: 6
    ///Project Name: Area Calculator
    ///File Name: Area.java
    ///Date Finished: 11/12/15
        
    import java.util.Scanner;
    
    public class Area
    {
        public static void main ( String[] args )
        {
            Scanner kb = new Scanner(System.in);
            
            int r, s, b, h, l, w, choice; //r= radius, s = square, b=base, h=height, l = length, w = width
            
            do
            {
                System.out.print( "\n1) Triangle \n2) Rectangle \n3) Square \n4) Circle \n5) Quit \nWhich shape: " );
                choice = kb.nextInt();
                System.out.println();
                
                if ( choice == 1 )
                {
                    System.out.print( "Base: " );
                    b = kb.nextInt();
                    System.out.print( "Height: " );
                    h = kb.nextInt();
                    System.out.println( "\nThe area is " + areaTriangle(b,h) + "." );
                }
                else if ( choice == 2 )
                {
                    System.out.print( "Length: " );
                    l = kb.nextInt();
                    System.out.print( "Width: " );
                    w = kb.nextInt();
                    System.out.println( "\nThe area is " + areaRectangle(l,w) + "." );
                }
                else if ( choice == 3 )
                {
                    System.out.print( "Side length: " );
                    s = kb.nextInt();
                    System.out.println( "\nThe area is " + areaSquare(s) + "." );
                }
                else if ( choice == 4 )
                {
                    System.out.print( "Radius: " );
                    r = kb.nextInt();
                    System.out.println( "\nThe area is " + areaCircle(r) + "." );
                }
                else if ( choice == 5 )
                    System.out.println( "\nGoodbye" );
                else
                    System.out.print( "\nerror" );
            } while ( choice != 5 );
        }
        
        public static double areaCircle( int r )
        {
            double A;
            
            A = Math.PI * r * r;
            
            return A;
        }
        
        public static int areaSquare( int s )
        {
            int A = s * s;
            
            return A;
        }
        
        public static int areaRectangle( int l, int w )
        {
            int A = w * l;
            return A;
        }
        
        public static double areaTriangle ( int b, int h )
        {
            double A;
            
            A = 0.5 * b * h;
            
            return A;
        }
    }
    

Picture of the output