package my_mian_shi;

import java.util.Random;

class IntToStringBit {
	
	/**
	 * 遞歸方式求整數的二進制
	 * @param a
	 * @return
	 */
	public static String intToBit(int a) {
		if(a==0) return "0";
		if(a==1) return "1";
		return intToBit(a/2)+(a%2)+"";
	}
	
	public static void main(String[] args) {
		int a=new Random().nextInt(1000);
		System.out.println(a);
		System.out.println(IntToStringBit.intToBit(a));
	}
}

有什麽不對可以提出來

Int轉化為二進制字符串類型遞歸實現