Distance Traveled Calculation Java Code Program

The distance a vehicle travels can be calculated as fallout: 

Distance = Speed * Time 

For example, if a train travels 40 miles-per-hour for three hours, the distance traveled is 120 miles. Write a program that asks for the speed of a vehicle (in miles-per-hour) and the number of hours it has traveled. It should use 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 chat follows: 

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 1 for time traveled.

Code:

package programmingChallenge;

import java.util.*;

public class Question2 

{

public static void main(String[]args)

{

Scanner sc = new Scanner(System.in);

float speed =0,hour;

System.out.println("Enter the speed of a vehicle (in miles-per-hour):");

speed = sc.nextFloat();

while(speed<=0 )

{

System.out.println("Enter a positive value for speed!");

System.out.println("Enter the speed of a vehicle (in miles-per-hour): ");

speed = sc.nextFloat();

}

System.out.print("Enter the number of hours it has traveled: ");

hour = sc.nextFloat();

while(hour<1 )

{

System.out.print("Enter a valid number of hour!");

System.out.print("Enter the number of hours it has traveled:");

hour = sc.nextFloat();

}

System.out.println("Hour\t Distance Traveled (in mph)");

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

for(int a=1 ; a<=hour; a++)

{

System.out.println(a+"\t\t "+speed*a);

}

}

}