program logic of printing the prime numbers

Question

Can any body help to understand this java program?

It just prints prime numbers, as you enter how many you want and it works well.

class PrimeNumbers
{           


        

Answer 1

A quick but dirty solution..

import java.util.Scanner;

class testing
{
    public static void main(String args[])
    {
        Scanner input = new Scanner(System.in);
        int n, i, j, count = 1;
        System.out.print("How many Numbers ? : ");
        n = input.nextInt();
        for(j = 1;count<=n;j++)
        {

            if(j==1 || j==2)
            {
                System.out.println(j);
                count++;
                continue;
            }
            for(i=2;i<=j/2;i++)
            {
                if(j%i==0)
                    break;
                else if(i == j/2 && j%i != 0)
                {
                    System.out.println(j);
                    count++;
                }  
            }
        }       
    }
}