test.java

public static void main(String[] args){
        System.out.println("请输入数字");
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        /*十进制转二进制*/
        String result = Integer.toBinaryString(n);
        //int r = Integer.parseInt(result);
        //System.out.println(r);
        System.out.println("十进制转二进制"+result);
        
        /*二进制转十进制*/
        int decimal=Integer.parseInt(result, 2);
        System.out.println("二进制转十进制"+decimal);
    }