Hello, I need help on program that will allowed me to travel on the space and vi

Question

Hello,

I need help on program that will allowed me to travel on the space and visit four plants.

So I need the program read data about the person who's traveling from the user input.

then calculate the wieght and local age on each of the 4 plants.

Then will print out the data the user input it , and the results for each plants showed the age in that plant and the wieght.

Here some info about the plants:

These info for the wieght ratio in the plant which is the first number. then the second one is the earth days.

Thank you,

Jupiter 2.64 4380

Explanation / Answer

######## Planet.java############

package abc;

import java.text.DecimalFormat;

import java.util.Date;

import java.util.GregorianCalendar;

public class Planet

{

private String name;

private double gravity;

private int yearLength;

/** Constructs a Planet

@param planetName is the name of the Planet

@param weightRatio is the ratio of an object's weight on the planet to

that on Earth

@param daysInYear is the number of earth days in the planet's year

*/

public Planet( String planetName, double weightRatio, int daysInYear)

{

name = planetName;

gravity = weightRatio;

yearLength = daysInYear;

}

  

public double getLocalWeight (double earthWeight)

{

double localweight=this.getWeightRatio()*earthWeight;

return localweight;

}

public double getLocalAge (Date birthdate)

{

GregorianCalendar now = new GregorianCalendar();

Date today = now.getTime();

long earthdays = ((today.getTime())/1000 - (birthdate.getTime())/1000)/(60*60*24);

float age=earthdays/(float)this.yearLength;

return age;

}

public void display(double weight,Date birthdate)

{

DecimalFormat df = new DecimalFormat();

df.setMaximumFractionDigits(2);

System.out.println(getName()+" "+df.format(this.getLocalWeight(weight))+" "+df.format(this.getLocalAge(birthdate)));

}

/** Accessor function for the Planet's name

@return the name of the planet

*/

public String getName()

{

return name;

}

/** Accessor function for the Planet's weight ratio

@return the ratio of the planet's gravity to that of earth

*/

public double getWeightRatio()

{

return gravity;

}

/** Accessor function for the Planet's year length

@return the number of earth days in the planet's year

*/

public int getDaysInYear()

{

return yearLength;

}

/** Overrides the Object toString method to provide information about the

Planet in String form.

@return a string representing the Planet

*/

public String toString()

{

return name + " gravity = " + gravity + " year length = " + yearLength + " days ";

}

  

}

###########Spacetravel.java ##########3

package abc;

import abc.Planet;

import java.util.Date;

import java.util.GregorianCalendar;

import java.util.Scanner;

public class SpaceTravel

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

Planet venus=new Planet("Venus", 0.91, 225);

Planet mars=new Planet("Mars", 0.38, 687);

Planet jupiter=new Planet("jupiter", 2.64, 4380);

Planet uranus=new Planet("Uranus", 1.07, 30665);

Planet earth=new Planet("Earth", 1.0, 365);

System.out.println("Please Enter the Space traveller name");

String name=in.nextLine();

System.out.println("Please Enter the Space traveller's Birth date like '28 02 1995' ");

String bdate=in.nextLine();

System.out.println("Please Enter the spcae traveller's weight ");

double weight=in.nextDouble();

int bday=Integer.parseInt(bdate.split(" ")[0].replaceAll("-", "").replaceAll("/", ""));

int bmonth=Integer.parseInt(bdate.split(" ")[1].replaceAll("-", "").replaceAll("/", ""));

int byear=Integer.parseInt(bdate.split(" ")[2].replaceAll("-", "").replaceAll("/", ""));

GregorianCalendar g1=new GregorianCalendar(byear,bmonth,bday);

Date birthdate=g1.getTime();

System.out.println("----------------------------------------------------------------------");

System.out.println("Traveler name: "+name);

System.out.println("Traveler weight: "+weight);

System.out.println("Traveler birth month: "+bmonth);

System.out.println("Traveler birth day: "+bday);

System.out.println("Traveler birth year: "+byear);

  

System.out.println("======================================================================");

  

System.out.println("Traveler: "+name);

System.out.println("Weight: "+weight);

System.out.println("Birthday: "+bmonth+"/"+bday+"/"+byear);

  

System.out.println("----------------------------------------------------------------------");

System.out.println("Name Weight(lbs) Age(Years)");

  

System.out.println("-----------------------------------------------------------------------");

  

earth.display(weight, birthdate);

venus.display(weight, birthdate);

mars.display(weight, birthdate);

jupiter.display(weight, birthdate);

uranus.display(weight, birthdate);

System.out.println("========================================================================");

}

  

}

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