Java Compilation

I want to write a program that takes a positive integer from the keyboard. I want my program to sum all the integers from 1 up to and including the number entered. For example, if the user enters 5, the loop will sum 1+2+3+4+5.

I want the program to make the same calculation three times (using for loop, while loop, and do while loop). The loops should result in the same sum for all three calculations each output to the screen.

Example program run:

Please enter a positive integer: 5

Using a for loop, the sum is = 15
Using a while loop, the sum is = 15
Using a do while loop, the sum is = 15


Here is what i came up with:

import java.util.Scanner;
puplic class Project1
{
public static void main(String[] args)
{
Scanner key = new Scanner(System.in);
System.out.println("Please enter a positive integer: ");
int i = key.nextInt();

if(i < 0)
{
System.out.println("Please reenter a positive integer: ");
i++;
}

for(int b = 0; b >= i; b++)
{
System.out.println("Using the for loop, the sum is = " +i);
b++;
}
while(r>=0)
{
System.out.println("Using the while loop, the sum is =" +i)
r++;
}
do
{
System.out.println("Using the do while loop the sum is = " +i);
x++;
} while(x>=0)
}

}