java讀入完整的一行字符串，包括行前行間行後的空格

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.Stack;
import java.util.Vector;

public class Main {

	public static void main(String[] args) throws IOException {
		String S;
		int n;
		Scanner sc = new Scanner(System.in);
		int n1 = sc.nextInt();
		BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));//重點
		String s = stdin.readLine();
		System.out.println(s+"長度"+s.length());
	}
}