public class Demo_5 {

  public static void main(String[] args) {
  
    FileReader fr=null;            //文件取出字符流對(duì)象（輸入流）  
    FileWriter fw=null;            //寫(xiě)入到文件（輸出流）

    try {
      fr=new FileReader("e:\\test.txt");  //創(chuàng)建一個(gè)fr對(duì)象  
      fw=new FileWriter("d:\\test.txt");  //創(chuàng)建輸出對(duì)象
      
      char []c=new char[1024];       //讀入到內(nèi)存
      int n=0;               //記錄實(shí)際讀取到的字符數(shù)
      while((n=fr.read(c))!=-1){
        //String s=new String(c,0,n);
        fw.write(c,0,n);          
      }
    } catch (Exception e) {
      e.printStackTrace();
    }finally{
    
      try {
        fr.close();
        fw.close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }    
  }
}

public class Demo_6 {

  public static void main(String[] args) {

    BufferedReader br=null;
    BufferedWriter bw=null;
    
    try{    
      FileReader fr=new FileReader("e:\\test.txt");  //先創(chuàng)建FileReader對(duì)象
      br=new BufferedReader(fr);

      FileWriter fw=new FileWriter("d:\\test1.txt"); //創(chuàng)建FileWriter對(duì)象
      bw=new BufferedWriter(fw);
      
      String s="";
      while((s=br.readLine())!=null){         //循環(huán)讀取文件，s不為空即還未讀完畢   
        bw.write(s+"\r\n");             //輸出到磁盤(pán)，加上“\r\n”為了實(shí)現(xiàn)換行
      } 
    }catch(Exception e){
      e.printStackTrace();
    }finally{  
      
      try {
        br.close();
        bw.close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}