//读取二进制文件  

public static void ReadBinaryFile()

 {   System.out.println("请输入你要读的文件路径:");   Scanner in = new Scanner(System.in);      String path = in.next();   try {    FileInputStream inputFile = new FileInputStream(path);    DataInputStream input = new DataInputStream(inputFile);    FileOutputStream outFile = new FileOutputStream("d:\\first.class");    DataOutputStream output = new DataOutputStream(outFile);    int size = input.available();    byte[] me = new byte[size];    input.read(me);    output.write(me);    output.close();    outFile.close();    input.close();    inputFile.close();    System.out.println("文件复制成功");   } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  }    public static void BufferWriter()  { //  使用缓冲区存数据 此种效率高   System.out.println("请输入你要写入的文件路径:");   Scanner in = new Scanner(System.in);      String path = in.next();      try {    FileWriter fw = new FileWriter(path);    BufferedWriter bw = new BufferedWriter(fw);    System.out.println("请输入你要写进文件的内容");    //bw.write(in.next());    //bw.newLine();    bw.append(in.next());//添加数据    bw.close();    fw.close();    System.out.println("文件写入成功");   } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  }    public static void BufferRead()  {   //使用缓冲区存数据 此种效率高   System.out.println("请输入你要读的文件路径:");   Scanner in = new Scanner(System.in);      String path = in.next();   try {    FileReader fr = new FileReader(path);    BufferedReader br = new BufferedReader(fr);    String str = null;     while((str=br.readLine())!=null)     {      System.out.println(str);     }    br.close();    fr.close();   } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   };  }    public void WriteFile()  {   System.out.println("请输入你要写入的文件路径:");   Scanner in = new Scanner(System.in);      String path = in.next();      try {       //写入流    OutputStream file = new FileOutputStream(path);    System.out.println("请输入要写入地文件内容:");    String str = in.next();    byte[] words = str.getBytes();    file.write(words);    file.close();    System.out.println("写入成功");    } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  }  public static void ReadFile()  {   System.out.println("请输入你要读取的文件路径:");   Scanner in = new Scanner(System.in);      String path = in.next();      try { //      读入流    InputStream file = new FileInputStream(path);    int size;     size = file.available();    System.out.println("文件可读取的最大数:"+size);    byte[] text = new byte[size];     file.read(text,0,size);     String s = new String(text);     System.out.println(s);   } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  }