Java Program to print the Random Number between given starting and ending value.

Java: Randomize Numbers

package basics;
import java.util.*;
import javax.swing.JOptionPane;

class Basics { // done by Zulqurnain jutt
    public static void main(String[] args) {
        String s;
        int si,ei,numi;
        s=JOptionPane.showInputDialog(null, "\t::Starting Range::\t");
        si=Integer.parseInt(s);
        s=JOptionPane.showInputDialog(null, "\t::Ending Range::\t");
        ei=Integer.parseInt(s);
        s=JOptionPane.showInputDialog(null, "\t::How Much Numbers ?::\t");
        numi=Integer.parseInt(s);
        System.out.println(numi+" Random Numbers in range "+si+" - "+ei);
        s=null;
        if(numi<(ei-si)){
            for(int i=0,sum=0;;i++){
                Random r=new Random();
                int n=(si + (r.nextInt(ei-si+1)));
                if(s==null){
                    s=Integer.toString(n)+"\n";
                }
                else{
                    s+=Integer.toString(n)+"\n";
                }
                sum+=n;
                if(sum==21 && i==numi-1){
                    System.out.println(s);
                    break;
                }
                else if(i==numi-1){
                    i=-1;
                    sum=0;
                    s=null;
                }
            }
        }
        else{
            System.out.println("Not Pssible in this range");
        }
    }
}