public class jinzhi {
    public static void main(String[] args) {
        int a = 15;
        int x = 0;
        int i=0;
        while (a > 0) {
            x = (int) (x + (a % 2) * Math.pow(10,i));
            a = a / 2;
            i=i+1;
        }
        System.out.print("jinzhi11111十进制a转换二进制x为：" + x);
    }
}