Question

It is the year 2030, the MarsX Space Vehicles Company is in the process of designing its X-2 single use Space
Transportation Systems (STS). You have been tasked with creating a class to model a single STS.
Design a class named STS (Space Transportation System) that contains:
1. A private int data field named STSId for the STS registration ID.
2. A private Date data field named dateCreated that stores the date when the STS was created.
3. A private double data field named emptyMass in pounds (default to 613,100) which represents the mass
of the STS before fueling.
4. A private double data field named fuelMass in pounds (default to 3,785,000) which represents the mass
of the fuel needed by the STS.
5. A private double data field named payloadMass in pounds (default to 0) which represents the mass of
the STS payload.
6. A private double data field named totalMass which represents the mass of the STS after it has been
assembled in the launchpad fully fueled (emptyMass + fuelMass + payloadMass).
7. A private String data field named manufacturer that stores the name of the company that built the STS
(default “MarsX”). Assume all STSs have the same manufacturer.
8. A private int data field flightTime in seconds (default to 0).
9. A no-arg constructor that creates a default STS and initializes the STSId with a 5 digit random integer
and the date when the STS was created.
10. A two-argument constructor that creates an STS with a specific initial fuel mass and payload mass
(constructor arguments) and also initializes the STSId with a 5 digit random integer and the date when
the STS was created.
11. The accessor (get) and mutator (set) methods for manufacturer, fuelMass and payloadMass
12. The accessor (no mutator) methods for flightTime, emptyMass, totalMass, STSId and dateCreated.
13. A method named increseFlightTime() that increases the flight time by 5 seconds. The STS burns
through 1% of its fuel for every second of flight (up to the original fuelMass).
14. A method named deployPayload() that deploys the payload in space (mass will be affected). The STS
takes 200 seconds to get to space. It cannot deploy its payload before that. Show error message if this
method is called before the STS gets to space.
*Provide appropriate input validation for these methods. Print a message to the console if the arguments passed
to the method do not pass the validation test(s).

Write a test program (class TestSTS) that creates an STS object and tests every method of the class. (use
console output).

solve in java please

Answer 1

Screenshot

10 /** 2 * Test class For STS class 3 * @author deept 5 */ 6 public class TestSTS { public static void main(String[] args) { // Create a default object of STS class STS sts=new STS(); //Check accessor methods System.out.println("Default constructor and accessor Test:-"); System.out.println("Manufacturer: "+sts.getManufacturer()); System.out.println("Date Created: "+sts.getDateCreated()); System.out.println("STSID: "+sts.getSTSId()); System.out.println("Emty Mass: "+sts.getEmptyMass(); System.out.println("Fuel Mass: "+sts.getFuelMass()); System.out.println("Payload Mass: "+sts.getPayloadMass(); System.out.println("Total Mass: "+sts.getTotalMass(); System.out.println("FlightTime: "+sts.getFlightTime()+" seconds"); //Mutator test System.out.println("\nMutator Test :-"); sts.set Fuel Mass/3885000): Console X <terminated> TestSTS [Java Application] C:\Program FilesVava\jre 1.8.0_161\bin\javaw.exe (18-Mar-2020, 6:43:51 Default constructor and accessor Test:- Manufacturer: MarsX Date Created: Wed Mar 18 06:43:52 IST 2020 STSID: 46911 Emty Mass: 613100.0 Fuel Mass: 3785000.0 Payload Mass: 0.0

Program

STS.java

import java.util.Date;
import java.util.Random;
/**
* Create a class Space Transportation System
* @author deept
*
*/
public class STS {
   //Attributes
   private int STSId;
   private Date dateCreated;
   private double emptyMass;
   private double fuelMass;
   private double payloadMass;
   private double totalMass;
   private String manufacturer;
   private int flightTime;
   //Default constructor initializes the STSId with a 5 digit random integer
   //and the date when the STS was created.
   public STS() {
       Random rand=new Random();
       STSId=10000 + rand.nextInt(90000);
       dateCreated=new Date();
       fuelMass=3785000;
       emptyMass=613100;
       payloadMass=0;
       totalMass=emptyMass + fuelMass + payloadMass;
       manufacturer="MarsX";
       flightTime=0;
   }
   //A two-argument constructor that creates an STS with a specific initial fuel mass and payload mass
   //(constructor arguments) and also initializes the STSId with a 5 digit random integer and the date when
   //the STS was created.
   public STS(double fuelMass,double payloadMass) {
       Random rand=new Random();
       STSId=10000 + rand.nextInt(90000);
       dateCreated=new Date();
       if(fuelMass<3785000) {
           this.fuelMass=3785000;
       }
       else {
           this.fuelMass=fuelMass;
       }
       emptyMass=613100;
       if(payloadMass<0) {
           this.payloadMass=0;
       }
       else {
           this.payloadMass=payloadMass;
       }
       totalMass=emptyMass + fuelMass + payloadMass;
       manufacturer="MarsX";
       flightTime=0;
   }
   //The accessor (get) and mutator (set) methods for manufacturer, fuelMass and payloadMass
   public double getFuelMass() {
       return fuelMass;
   }
   public void setFuelMass(double fuelMass) {
       this.fuelMass = fuelMass;
   }
   public double getPayloadMass() {
       return payloadMass;
   }
   public void setPayloadMass(double payloadMass) {
       this.payloadMass = payloadMass;
   }
   public String getManufacturer() {
       return manufacturer;
   }
   public void setManufacturer(String manufacturer) {
       this.manufacturer = manufacturer;
   }
   //The accessor (no mutator) methods for flightTime, emptyMass, totalMass, STSId and dateCreated.
   public int getSTSId() {
       return STSId;
   }
   public Date getDateCreated() {
       return dateCreated;
   }
   public double getEmptyMass() {
       return emptyMass;
   }
   public double getTotalMass() {
       return totalMass;
   }
   public int getFlightTime() {
       return flightTime;
   }
   //Method increases the flight time by 5 seconds.
   //The STS burns through 1% of its fuel for every second of flight (up to the original fuelMass).
   public void increseFlightTime() {
       if(fuelMass-(fuelMass*5*.01)>=0) {
           flightTime+=5;
           fuelMass-=(fuelMass*5*.01);
       }
       else {
           System.out.println("Error!!!Empty Fuel");
       }
   }
   //Method deploys the payload in space (mass will be affected).
   //The STS takes 200 seconds to get to space.
   //It cannot deploy its payload before that.
   //Show error message if this method is called before the STS gets to space.
   public void deployPayload() {
       if(flightTime<200) {
           System.out.println("Error!!!STS need 200seconds to reach space,Can't deploy!!!");
       }
       else {
           totalMass-=payloadMass;
           System.out.println("Deploy payload!! TotalMass = "+totalMass);
       }
   }
}

TestSTS.java

/**
* Test class For STS class
* @author deept
*
*/
public class TestSTS {

   public static void main(String[] args) {
       //Create a default object of STS class
       STS sts=new STS();
      
       //Check accessor methods
       System.out.println("Default constructor and accessor Test:-");
       System.out.println("Manufacturer: "+sts.getManufacturer());
       System.out.println("Date Created: "+sts.getDateCreated());
       System.out.println("STSId: "+sts.getSTSId());
       System.out.println("Emty Mass: "+sts.getEmptyMass());
       System.out.println("Fuel Mass: "+sts.getFuelMass());
       System.out.println("Payload Mass: "+sts.getPayloadMass());
       System.out.println("Total Mass: "+sts.getTotalMass());
       System.out.println("FlightTime: "+sts.getFlightTime()+" seconds");
      
       //Mutator test
       System.out.println("\nMutator Test :-");
       sts.setFuelMass(3885000);
       sts.setPayloadMass(32084);
       System.out.println("Payload Mass: "+sts.getPayloadMass());
       System.out.println("Fuel Mass: "+sts.getFuelMass());
       System.out.println("Total Mass: "+sts.getTotalMass());
      
       //Test for deploy
       System.out.println("\nDeploy Test1: ");
       sts.deployPayload();
      
       System.out.println("\nDeploy Test2: ");
       for(int i=0;i<200;i+=5) {
           sts.increseFlightTime();
       }
       sts.deployPayload();
   }

}

Output

Default constructor and accessor Test:-
Manufacturer: MarsX
Date Created: Wed Mar 18 06:43:52 IST 2020
STSId: 46911
Emty Mass: 613100.0
Fuel Mass: 3785000.0
Payload Mass: 0.0
Total Mass: 4398100.0
FlightTime: 0 seconds

Mutator Test :-
Payload Mass: 32084.0
Fuel Mass: 3885000.0
Total Mass: 4398100.0

Deploy Test1:
Error!!!STS need 200seconds to reach space,Can't deploy!!!

Deploy Test2:
Deploy payload!! TotalMass = 4366016.0