Java byte pro

Write byte to file using Buffered Output Stream

import java.io.BufferedOutputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

public class WriteByteToFile

{

public static void main(String[] args)

{

String strFile = "C:/FileIO/BufferedOutputStreamDemo.txt";

BufferedOutputStream bos = null;

try

{

FileOutputStream fos = new FileOutputStream(strFile);bos = new BufferedOutputStream(fos);byte b = 66;System.out.println("BufferedOutputStream: writing file"); bos.write(b);

System.out.println("BufferedOutputStream : written file");

}

catch(FileNotFoundException fnfe)

{

System.out.println("Specified file not found" + fnfe);

}

catch(IOException ioe)

{

System.out.println("Error while writing to file" + ioe);

}

finally

{

try

{

if(bos != null)

{

bos.flush();

bos.close();

}                                                               

}

catch(Exception e){}                         

     }               

    }

}

Write byte array to file using Buffered Output Stream

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.FileOutputStream;

public class WriteByteArrayToFile

{

public static void main(String[] args)

{

String strFileName = "C:/FileIO/BufferedOutputStreamDemo";

BufferedOutputStream bos = null;

try

{

FileOutputStream fos = new FileOutputStream(new File(strFileName));

bos = new BufferedOutputStream(fos);

                     

String str = "BufferedOutputStream Example";

System.out.println("Writing byte array to file");

bos.write(str.getBytes());

System.out.println("File written");

}

catch(FileNotFoundException fnfe)

{

System.out.println("Specified file not found" + fnfe);

}

catch(IOException ioe)

{

System.out.println("Error while writing file" + ioe);

}

finally

{

if(bos != null)

{

try

{

bos.flush(); bos.close();

}

catch(Exception e){}

      }

    }

   }

}

Extract Zip File With Subdirectories Using Command Line Argument

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipInputStream;

public class ExtractFileSubDirectories

 {

      

public static void main(String args[])

{

String strZipFile = args[0];                                

if(strZipFile == null || strZipFile.equals(""))

{

System.out.println("Invalid source file");

System.exit(0);

}

unzip(strZipFile);

System.out.println("Zip file extracted!");

}

private static void unzip(String strZipFile)

 {

try

{

File fSourceZip = new File(strZipFile);

String zipPath = strZipFile.substring(0, strZipFile.length()-4);

File temp = new File(zipPath);

temp.mkdir();

System.out.println(zipPath + " created");

ZipFile zipFile = new ZipFile(fSourceZip);

Enumeration e = zipFile.entries();                      

while(e.hasMoreElements())

{

ZipEntry entry = (ZipEntry)e.nextElement();

File destinationFilePath = new File(zipPath,entry.getName());

destinationFilePath.getParentFile().mkdirs();

if(entry.isDirectory())

{

continue;

}

else

{

System.out.println("Extracting " + destinationFilePath);

BufferedInputStream bis = new BufferedInputStream(zipFile

.getInputStream(entry));

int b;

byte buffer[] = new byte[1024];

FileOutputStream fos = new FileOutputStream(destinationFilePath);

BufferedOutputStream bos = new BufferedOutputStream(fos,

1024);

while ((b = bis.read(buffer, 0, 1024)) != -1)

{

bos.write(buffer, 0, b);

}                           

bos.flush();

bos.close();

bis.close();

    }

   }

}

catch(IOException ioe)

{

System.out.println("IOError :" + ioe);

    }

  }

}

Read byte array using Byte Array Input Stream

import java.io.ByteArrayInputStream;

public class ByteArrayInputStreamExample

{

public static void main(String[] args)

{

String str = "ByteArrayInputStream Example!";

byte[] bytes = str.getBytes();

ByteArrayInputStream bai = new ByteArrayInputStream(bytes);

int ch;

while((ch = bai.read()) != -1)

{

System.out.print((char)ch);

    }

    }

}