Programmed in Java: The distance a vehicle travels can be calculated as follows:
ID: 3870617 • Letter: P
Question
Programmed in Java:
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 travelled is 120 miles.
Design a class that stores the speed of a vehicle (in miles per hour) and the number of hours it has traveled. It should have a method named getDistance that returns the distance, in miles, that the vehicle has travelled.
Demonstrate the class in a program that uses a loop 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 any value less than one for time.
Explanation / Answer
DistanceTest.java
package a12;
import java.util.Scanner;
public class DistanceTest {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("Enter the speed of a vehicle (in miles per hour): ");
int speed = scan.nextInt();
while(speed < 0) {
System.out.print("Invalid speed. ");
System.out.println("Enter the speed of a vehicle (in miles per hour): ");
speed = scan.nextInt();
}
System.out.println("Enter the number of hours it has traveled: ");
int hours = scan.nextInt();
while(hours < 0) {
System.out.print("Invalid hours. ");
System.out.println("Enter the speed of a vehicle (in miles per hour): ");
hours = scan.nextInt();
}
System.out.println("Hour Distance Traveled");
System.out.println("-------------------------------");
for(int i=1;i<=hours;i++){
Distance d = new Distance(speed, i);
System.out.println(i+" "+d.getDistance());
}
}
}
Output:
Enter the speed of a vehicle (in miles per hour):
40
Enter the number of hours it has traveled:
3
Hour Distance Traveled
-------------------------------
1 40
2 80
3 120
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