Assignemnt #38, Space Boxing

Code

      /// Name: Ales Pinder
      /// Period: 5
      /// Program Name: Space Boxing
      /// File Name: prog38.java
      /// Date Complete: 10/29/15
      
      import java.util.Scanner;
      
      public class prog38
      {
          public static void main( String[] args )
          {
              Scanner keyboard = new Scanner (System.in);
              
              double weight;
              int  answer;
              System.out.print( "Please enter your current earth weight: " );
              weight = keyboard.nextDouble();
              
              System.out.println( "\nI have information for the following planets: \n1. Venus  2. Mars  3. Jupiter  \n4. Saturn  5. Uranus  6. Neptune" );
              
              System.out.print( "\nWhich planet are you visiting? " );
              answer = keyboard.nextInt();
              
              if ( answer == 1 )
              {
                  System.out.println(  "Your weight would be " + ( weight * 0.78 ) + " pounds on that planet." );
              }
              else if ( answer == 2 )
              {
                  System.out.println( "Your weight would be " + ( weight * 0.39 ) + " pounds on that planet." );
              }
              else
              {
                  if ( answer == 3 )
                  {
                      System.out.println( "Your weight would be " + ( weight * 2.65 ) + " pounds on that planet." );
                  }
                  else if ( answer == 4 )
                  {
                      System.out.println( "Your weight would be " + ( weight * 1.17 ) + " pounds on that planet." );
                  }
                  else
                  {
                      if ( answer == 5 )
                      {
                          System.out.println( "Your weight would be " + ( weight * 1.05 ) + " pounds on that planet." );
                      }
                      else if ( answer == 6 )
                      {
                          System.out.println( "Your weight would be " + ( weight * 1.23 ) + " pounds on that planet." );
                      }
                      else
                      {
                          if ( answer < 1 )
                          {
                              System.out.println( "That is not a planet!" );
                          }
                          else if ( answer < 6 )
                          {
                              System.out.println( "That is not a planet!" );
                          }
                      }
                  }
              }
          }
      }
    

Picture of the output