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);
}