Assignemnt 97 and AreaCalculator

Code

    /// Name: Xinting Chen
    /// Period: 7
    /// Program Name: Area Calculator
    /// File Name: AreaCalculator.java
    /// Date Finished: 3/29/2016
  
        import java.util.Scanner;

        public class AreaCalculator
        {
        	public static void main( String[] args )
        	{
        		Scanner keyboard = new Scanner(System.in);
                
                System.out.println( "1) Traingle ");
                System.out.println( "2) Rectangle " );
                System.out.println( "3) Square " );
                System.out.println( "4) Circle " );
                System.out.println( "5) Quit ");
                
                
                System.out.print( "Which shape: ");
                int shape = keyboard.nextInt();
                System.out.print( "" );
                
                while ( shape != 5 )
                {
                    
                    if ( shape == 1 )
                    {
                        System.out.print( "Base: " );
                        int base = keyboard.nextInt();
                        System.out.print( "Height: ");
                        int height = keyboard.nextInt();
                        System.out.println("");
                        System.out.println("The area is " + areaTriangle(base, height));
                        System.out.println("");
                    }
                    
                    else if ( shape == 2 )
                    {
                        System.out.print( "Length: " );
                        int length = keyboard.nextInt();
                        System.out.println( "Width: " );
                        int width = keyboard.nextInt();
                        System.out.println("");
                        System.out.println("The area is " + areaRectangle(length, width));
                        System.out.println("");
                    }
                   
                    else if ( shape == 3 )
                    {
                        System.out.print( "Side length: ");
                        int side = keyboard.nextInt();
                        System.out.println("");
                        System.out.println("The area is " + areaSquare(side));
                        System.out.println("");
                                           
                                              
                    }
                    
                    else if ( shape == 4)
                    {
                        System.out.print( "Radius: " );
                        int radius = keyboard.nextInt();
                        System.out.println("");
                        System.out.println("The area is " + areaCircle(radius));
                        System.out.println("");
                    }
                    
                    else 
                        System.out.print( "ERROR" );
                        
                        System.out.println( "1) Traingle ");
                        System.out.println( "2) Rectangle " );
                        System.out.println( "3) Square " );
                        System.out.println( "4) Circle " );
                        System.out.println( "5) Quit ");
                        System.out.println( "Which shape?");               
        
                }
                System.out.println( "Goodbye");
            }
                                           
                                           
                    public static double areaTriangle( int base, int height)
                    {
                        double result;
                        result = (base * height) / 2 ;
                        return result;
                    }
                    public static int areaRectangle( int length, int width )
                    {
                        int result;
                        result= length * width;
                        return result;
                    }
                    public static int areaSquare( int side )
                    {
                        int result;
                        result= side * side;
                        return result;
                    }
                    public static double areaCircle( int radius ) 
                    {
                        double result;
                        result= 3.14159265359 * ( radius * radius );
                        return result;
                    }
                }
          





    

Picture of the output