How to run java program in command prompt

// Run java program in command prompt
public class Fibonacci{
public static void main(String[] args){

int i, fibCount = 12;
int[] fib = new int[fibCount];

fib[0] = 0;
fib[1] = 1;

for(i=2; i<fibCount; i++){

fib[i] = fib[i-1]+fib[i-2];
}

System.out.print("Fibonacci series:");

for(i=0; i<fibCount; i++){

System.out.print(" "+fib[i]);
}
}
}
O/p : 0 1 1 2 3 5 8 13 21 34 55 89
Live demo: https://www.youtube.com/watch?v=COL2L-uYF7I