Почему не компилируется? Подскажите пожалуйста

package com.javarush.task.task13.task1318;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.FileInputStream;


/*
Чтение файла
*/

public class Solution {
    public static void main(String[] args) {
        // напишите тут ваш код

        BufferedReader aa = new BufferedReader(new InputStreamReader(System.in));

        FileInputStream in = new FileInputStream(aa.readLine());

        while (in.available() > 0){
            System.out.println((char)in.read());
        }
        aa.close();
        in.close();
    }
}

Ошибки: com/javarush/task/task13/task1318/Solution.java:18: error: unreported exception java.io.IOException; must be caught or declared to be thrown FileInputStream in = new FileInputStream(aa.readLine()); ^ com/javarush/task/task13/task1318/Solution.java:18: error: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown FileInputStream in = new FileInputStream(aa.readLine()); ^ com/javarush/task/task13/task1318/Solution.java:20: error: unreported exception java.io.IOException; must be caught or declared to be thrown while (in.available() > 0){ ^ com/javarush/task/task13/task1318/Solution.java:21: error: unreported exception java.io.IOException; must be caught or declared to be thrown System.out.println(in.read()); ^ com/javarush/task/task13/task1318/Solution.java:23: error: unreported exception java.io.IOException; must be caught or declared to be thrown aa.close(); ^ com/javarush/task/task13/task1318/Solution.java:24: error: unreported exception java.io.IOException; must be caught or declared to be thrown in.close(); ^