자바 !! io,한줄받기,파일읽고쓰기,FileReader,FileWriter

!! io,한줄받기,파일읽고쓰기,FileReader,FileWriter
=======================================
한줄받기

import java.io.*;
class Test1{
 public static void main(String[] args){
  byte[] bt = new byte[128];
  /*
  try{
   System.in.read(bt);
   System.out.print(new String(bt));
  }catch(Exception e){}
  */

  
  int i = 0,c = 0;
  try{
   while((c=System.in.read())!=(-1)){
    if(c!=13 && c!=10){
     bt[i++]=(byte)c;
    }else{
     System.out.print(new String(bt));
     i=0;
     bt= new byte[128];
    }

   }
  }catch(Exception e){}  

 }
}
==================================================
import java.io.*;

class TestFileWriter
{
 public static void main(String[] args){
  int c=0;
  int idx=0;
  try{
   FileWriter fw=new FileWriter("a.txt");
   byte[] buf=new byte[32];
   while((c=System.in.read())!=-1){
    if(c!=13&&c!=10){
     buf[idx++]=(byte)c;
    }else{
     System.out.println(new String(buf,0,idx));
     fw.write(new String(buf,0,idx));
     fw.close();
//     idx=0;
//     buf=new byte[32];
     java.util.Arrays.fill(buf,(byte)0);//초기화
    }
   }
  }catch(Exception e){}

 }
}
====================================================
import java.io.*;

class  FileReaderTest
{
 public static void main(String[] args)
 {
  byte[] bt = new byte[50];
  try{
  FileReader fr = new FileReader("a.txt");
  int n = 0 ;
  while((n = fr.read())!=-1){
   System.out.print((char)n);
  }
  }
  catch(Exception e){}
 }
}
===========================
socket
serversocket
개념
예제

[출처] 3/29(목) 자바 !! io,한줄받기,파일읽고쓰기,FileReader,FileWriter|작성자 네리츠