将正整数转化成二进制形式输出

public class SimpleTest {
    @Test
    public void test(){
        //方法一
        System.out.println(Integer.toBinaryString(50));


        //方法二
        StringBuilder sb = new StringBuilder();
        int b = 50;
        for(int n = b;n > 0;n = (n/2)){
            int r = n % 2;
            sb.append(r);
        }
        System.out.println(sb.reverse());
    }
}