FileInputStream과 FileOutputStream(Java)

import java.io.*;
public class FileStreamTest {
    public static void main(String[] args) throws IOException {
        FileInputStream in = null;
        FileOutputStream out = null;
        try {
            int c;
            out = new FileOutputStream("data.txt", false);
            for(int i=0;i <10; i++) {
                out.write(i);
            }
            in = new FileInputStream("data.txt");
            while ((c = in.read()) != -1) {
                System.out.print(c+" ");
            }
        } finally {
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
        }
    }
}

실행결과