Assignment #38 and SpaceBoxing

Code

    
///John Mulligan
///Period: 5
///Program Name: SpaceBoxing
///File Name: SpaceBoxing.java

import java.util.Scanner;

public class SpaceBoxing 
{
    public static void main( String[] args)
    {
        Scanner weightbot = new Scanner(System.in);
        
        double earthWeight, marsWeight, jupiterWeight, saturnWeight, uranusWeight, neptuneWeight, newWeight;
        
        int planetId;
        
        System.out.println("Please enter your current earth weight: ");
        earthWeight = weightbot.nextDouble();
        
        System.out.println("I have information for the following planets: ");
        System.out.println(" \t1. Venus \t2. Mars \t3. Jupiter");
        System.out.println(" \t4. Saturn \t5. Uranus \t6. Neptune");
        
        System.out.println();
        
        System.out.print("Which planet are you visiting?");
        planetId = weightbot.nextInt();
        
        if ( planetId == 1 )
        {
            newWeight = earthWeight * .78;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }
        else if ( planetId == 2 )
        {
            newWeight = earthWeight * .39;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }
        else if ( planetId == 3 )
        {
            newWeight = earthWeight * 2.65;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }
        else if ( planetId == 4 )
        {
            newWeight = earthWeight * 1.17;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }
        else if ( planetId == 5 )
        {
            newWeight = earthWeight * 1.05;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }
        else if ( planetId == 6 )
        {
            newWeight = earthWeight * 1.23;
            System.out.println();
            System.out.println("Your weight would be " + newWeight + " on that planet.");
        }        
        
        
    }
}