버퍼

버퍼란 데이터가 움직이기전에 머무르는 장소라고 생각하면 편한다.

데이터를 하나하나 옮기지 않고 버퍼라는 저장공간에 저장했다가 한번에 내보내는 것이다

EX:

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import java.io.BufferedOutputStream; import java.io.BufferedWriter; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.util.Scanner;   public class buffer_stream {     public static FileReader FR=null;     public static void main(String[] args) {         // TODO Auto-generated method stub         File root=new File("C:\\Temp\\test22.txt");         try {             FR=new FileReader(root);//버퍼가 5를 넘어가면 5까지 출력             BufferedWriter BF=new BufferedWriter(new OutputStreamWriter(System.out,"utf-8"),5);//크기가 5인 버퍼를 만듬             int c;             while ((c=FR.read())!=-1) {                 BF.write((char)c);                              }//5까지만 버퍼를 출력             //new Scanner(System.in).nextLine();//.엔터누르면 남아잇는 버퍼 모두출력 이제 이 Scanner 객체를 지정할수없음 일회용임 다시말해 닫을 수도없다는 의미 노란줄이 뜨는이유임             //BF.flush();             BF.close();             FR.close();         } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();// 오류메세지 출력         }     }   }   Colored by Color Scripter

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