Having trouble with a java assignment This is the Question : The distance a vehi

Question

Having trouble with a java assignment This is the Question : The distance a vehicle travels can be calculated as follows: Distance = Speed * Time For example, if a train travels 40 miles per hour (mph) for three hours. The distance traveled is 120 miles or 40 * 3 = 120 Design a class called Distance whose constructor accepts two arguments. The speed of a vehicle (in miles per hour) and the number of hours it has traveled represented as a variable called time. Besides the appropriate gets (accessors) and sets (mutators), it should have a method named getDistance that returns the distance, in miles that the vehicle has traveled. Demonstrate the class in a main program called DistanceDemoFirstName that uses a while loop (period < = time) to display the distance a vehicle has traveled for each hour of a time period specified by the user. For example, if a vehicle is traveling at 40 mph for a three-hour time period, it should display a report similar to the one shown here. Hour Distance Traveled 1 40 2 80 3 120 Input Validation: Do not accept a negative number for speed, and do not accept any value less than one for time traveled (use a while loop to test for speed > = 0, and another while loop to test for time > 1). note* there should be 3 while loops. Any thoughts at all would be great.

Explanation / Answer

// Distance.java

public class Distance {
   private int speed;
   private int time;
  
   public Distance(int speed, int time) {
       this.speed = speed;
       this.time = time;
   }

   public int getSpeed() {
       return speed;
   }

   public void setSpeed(int speed) {
       this.speed = speed;
   }

   public int getTime() {
       return time;
   }

   public void setTime(int time) {
       this.time = time;
   }
  
   public int getDistance(){
       return time*speed;
   }
  
}

//DistanceDemoFirstName.java

import java.util.Scanner;

class DistanceDemoFirstName{
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
      
       int speed;
       int time;
       // asking for speed
       System.out.print("Enter speed (>=0): ");
       speed = sc.nextInt();
       while(speed < 0){
           System.out.print("Enter speed (>=0): ");
           speed = sc.nextInt();
       }
       // asking for time
       System.out.print("Enter time (>=1): ");
       time = sc.nextInt();
       while(time < 1){
           System.out.print("Enter time (>=1): ");
           time = sc.nextInt();
       }
       sc.close();
       // Creating Distance Object
       Distance d = new Distance(speed, time);
      
       // printing distance travelled per hour
       for(int i=1; i<=d.getTime(); i++){
           int distance = i*d.getSpeed();
           System.out.print(i+" "+distance+" ");
       }
       System.out.println();
   }
}

/*

Output:

Enter speed (>=0): 40
Enter time (>=1): 4
1 40 2 80 3 120 4 160

*/

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