JAva--io印刷ストリーム

package cn.bufanli.iodemo;

import java.io.*;

/**
 * @author BuShuangLi
 * @date 2018/12/27
 *    
 *   printStream
 *   printWriter
 *   :
 * 1.      ,        
 * 2.        
 * 3.      IO  ,        
 *
 *              
 *     :
 *   printStream()  File  、String  、     OutputStream
 *   printWriter()  File  、String  、     OutputStream、     Writer
 */
public class PrintDemo {

     public static void main(String[] args) throws IOException {
         // printMethod();
          //    
          copyMethod();
     }



     /**
      *    , File           
      *    print()      println   
      *          100        100
      */
     private static void printMethod() throws FileNotFoundException {
          //         
          PrintWriter writer = new PrintWriter(new File("F:\\a.txt"));
          writer.print(100);
          writer.flush();
          writer.close();
     }

     /**
      *   
      */
     private static void copyMethod() throws IOException {
          //   
          BufferedReader bufferedInputStream = new BufferedReader(new FileReader(new File("f:\\a.txt")));

          //       
          PrintWriter writer = new PrintWriter(new FileWriter(new File("F:\\h.txt")), true);
          //  

          int len =0;
     
          while ((len=bufferedInputStream.read())!=-1){
               writer.print(len);
          }
          bufferedInputStream.close();
          writer.close();
     }
}