Assignment #97 and AreaCalculator

Code

      /// Name: Jason Kim
      /// Period: 7
      /// Program Name: AreaCalculator
      /// File Name: AreaCalculator.java
      /// Date Finished:1/26/16
      import java.util.Scanner;
      
      public class AreaCalculator
      {
          public static void main(String[] args)
          {
              Scanner keyboard = new Scanner(System.in);
              int shape, stop = 1;
              
              System.out.println("Shape Area Calculator version 0.1 (c) 2016 Jason Inc.");
              do
              {
                  System.out.println("\n-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\n");
                  System.out.println("1) Triangle");
                  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: ");
                  shape = keyboard.nextInt();
                  System.out.println();
                  
                  if(shape == 1)
                  {
                      System.out.print("Base: ");
                      int base = keyboard.nextInt();
                      
                      System.out.print("Height: ");
                      int height = keyboard.nextInt();
                      
                      System.out.println("\nThe area is " + areaTriangle(base, height) + ".");
                  }
                  else if (shape == 2)
                  {
                      System.out.print("Length: ");
                      int length = keyboard.nextInt();
                      
                      System.out.print("Width: ");
                      int width = keyboard.nextInt();
                      
                      System.out.println("\nThe area is " + areaRectangle(length,width) + ".");
                  }
                  else if (shape == 3)
                  {
                      System.out.print("Side length: ");
                      int side = keyboard.nextInt();
                      
                      System.out.println("\nThe area is " + areaSquare(side) + ".");
                  }
                  else if (shape == 4)
                  {
                      System.out.print("Radius : ");
                      int radius = keyboard.nextInt();
                      
                      System.out.println("\nThe area is " + areaCircle(radius) + ".");
                  }
                  else if (shape == 5)
                  {
                      System.out.println("Goodbye.");
                      stop = 0;
                  }
                  else
                  {
                      System.out.println("Wrong number. Try again.");
                  }
              }while(stop != 0);
          }
          public static double areaCircle( int radius)
          {
              double area = Math.PI * radius * radius;
              return area;
          }
                                         
          public static int areaRectangle( int length, int width)
          {
              int area = length * width;
              return area;
          }
                                         
          public static int areaSquare( int side )
          {
              int area = side*side;
              return area;
          }
                                         
          public static double areaTriangle( int base, int height)
          {
              double area = base * height/2;
              return area;
          }
      }


    

Picture of the output