import java.io.*;


class NewClass{
    public static void  main(String[] args){



        /*
            (public abstract class OutputStream)
            OutputStream은 abstract 클래스이다. 하위클래스로 구현해야 한다.


            OutputStream의 하위클래스 종류
            ByteArrayOutputStream
            FileOutputStream
            FilterOutputStream
                BufferedOutputStream
                CheckedOutputStream
                CipherOutputStream
                DataOutputStream
                DeflaterOutputStream
                DigestOutputStream
                InflaterOutputStream
                PrintStream //  대기
            ObjectOutputStream
            OutputStream (다른패키지에있는거인듯)
            PipedOutputStream

            */

            long start;
            double temp;

            try{

                // 가장 기본 형식 OutputStream writer = new FileOutputStream("경로");
                   System.out.println("OutputStream의 하위클래스들은 PrintStream을 제외하고 문자열을 출력할수 없다.\n");
                   DataOutputStream out = new DataOutputStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\test\\out.txt"));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        out.write(50);
                   out.close();
                   System.out.println("DataOutputStream 속도 : " + (System.currentTimeMillis() - start));

                   start = System.currentTimeMillis();
                   DataInputStream in = new DataInputStream(new FileInputStream("C:\\Users\\Administrator\\Desktop\\test\\out.txt"));
                   while(true){
                       temp = in.read();
                       if(temp == -1)
                           break;}
                   in.close();
                   System.out.println("DataInputStream 속도 : " + (System.currentTimeMillis() - start));


                   DataOutputStream out2 = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\test\\out2.txt"), 1024 * 10));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        out2.write(50);
                   out2.close();
                   System.out.println("DataOutputStream (Buffered 장착) 속도 : " + (System.currentTimeMillis() - start));

                   start = System.currentTimeMillis();
                   DataInputStream in2 = new DataInputStream(new BufferedInputStream(new FileInputStream("C:\\Users\\Administrator\\Desktop\\test\\out2.txt"), 1024 * 10));
                   while(true){
                       temp = in2.read();
                       if(temp == -1)
                           break;}
                   in2.close();
                   System.out.println("DataInputStream (Buffered 장착) 속도 : " + (System.currentTimeMillis() - start));


                   System.out.printf("----------------------------------------------------\n");




                   System.out.println("PrintStream은 write() 메소드가 없다.\n");

                   PrintStream pout = new PrintStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\test\\pout.txt"));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pout.println("");
                   pout.close();
                   System.out.println("PrintStream 속도 : " + (System.currentTimeMillis() - start));


                   PrintStream pout2 = new PrintStream(new BufferedOutputStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\test\\pout2.txt"), 1024 * 10));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pout2.println("");
                   pout2.close();
                   System.out.println("PrintStream (Buffered 장착) 속도 : " + (System.currentTimeMillis() - start));


                   System.out.printf("----------------------------------------------------\n");

                   PrintWriter pw = new PrintWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\test\\pw.txt"));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pw.write("");
                   pw.close();
                   System.out.println("PrintWriter (write 메소드) 속도 : " + (System.currentTimeMillis() - start));


                   PrintWriter pw2 = new PrintWriter(new BufferedWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\test\\pw2.txt"), 1024 * 10));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pw2.write("");
                   pw2.close();
                   System.out.println("PrintWriter (Buffered 장착) (write 메소드) 속도 : " + (System.currentTimeMillis() - start));





                   PrintWriter pw3 = new PrintWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\test\\pw3.txt"));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pw3.printf("");
                   pw3.close();
                   System.out.println("PrintWriter (printf 메소드) 속도 : " + (System.currentTimeMillis() - start));


                   PrintWriter pw4 = new PrintWriter(new BufferedWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\test\\pw4.txt"), 1024 * 10));
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        pw4.printf("");
                   pw4.close();
          System.out.println("PrintWriter (Buffered 장착) (printf 메소드) 속도 : " + (System.currentTimeMillis() - start));



                   System.out.printf("----------------------------------------------------\n");


           BufferedWriter bw = new BufferedWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\test\\pw2.txt"), 1024 * 10);
                   start = System.currentTimeMillis();
                   for(int i = 0; i<1000; i++)
                       for(int j = 0; j< 1000; j++)
                        bw.write("");
                   bw.close();
                   System.out.println(System.currentTimeMillis() - start);


        }catch(Exception e){e.printStackTrace();}

    }
}