8.编写一个程序，它先将键盘上输入的一个字符串转换成十进制整数

import java.util.Scanner;

public class Hello {

public static void main(String[] args)  {
Scanner scanner = new Scanner(System.in);
String string = scanner.nextLine();
System.out.println(Integer.parseInt(string));
Hello.stringToDecimal(string);
}

static void stringToDecimal(String string){
StringBuffer stringBuffer = new StringBuffer();
int num = Integer.parseInt(string);
while(num > 0){
stringBuffer.insert(0, num % 2);
num /= 2;
}
System.out.println(stringBuffer);
}
}