代码如下：

import javax.swing.*;
 
public class Java_2 {
 
    public static void main(String[] args) {
        //*********Found********** 
        String input = ____________________.showInputDialog("你想抽几位数?");
        //*********Found********** 
        int k = Integer.parseInt(______________________);
input = JOptionPane.showInputDialog("你想在自然数中抽的最高数是几?");
        //*********Found********** 
        int n = ___________________.parseInt(input);
        int lotteryOdds = 1;
        for (int i = 1; i <= k; i++) {
            lotteryOdds = lotteryOdds * (n - i + 1) / i;
        }
        //*********Found********** 
        System.out.println("你中奖的几率是1/" + ____________ + ". Good luck!");
        System.exit(0);
    }
}