创建新的FileOutputStream时出现FileNotFoundException

Question

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.setOut(new PrintStream (new FileOutputStream("out.txt", false)));
    while(sc.hasNext()) System.out.println(sc.nextInt());

}

I've tried the above code and got this

Error:(9, 40) java: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown

I'm using IntelliJ IDEA Community, anyone know how to solve this?

Answer 1

public static void main(String[] args) throws IOException{
    Scanner sc = new Scanner(System.in);
    System.setOut(new PrintStream (new FileOutputStream("out.txt", false)));
    while(sc.hasNext()) System.out.println(sc.nextInt());
}

you need to throw it at the method declaration or you can use try catch block

public static void main(String[] args) throws IOException{
    Scanner sc = new Scanner(System.in);
    try {
        System.setOut(new PrintStream (new FileOutputStream("out.txt", false)));
    } catch(IOException e) {
        e.printstacktrace();
    }
    while(sc.hasNext())
        System.out.println(sc.nextInt());
}