Java File Outputstream

Append output to file using File Output Stream

import java.io.*;

public class AppendToFile

{

public static void main(String[] args)

{

String strFilePath = "C://FileIO//demo.txt";

try

{

FileOutputStream fos = new FileOutputStream(strFilePath, true);

String strContent = "Append output to a file example";

fos.write(strContent.getBytes());

fos.close();

}

catch(FileNotFoundException ex)

{

System.out.println("FileNotFoundException : " + ex);

}

catch(IOException ioe)

{

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

    }

  }

}

Copy binary file using Streams

import java.io.FileNotFoundException;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

public class CopyBinaryFile

 {

public static void main(String[] args)

 {

String strSourceFile="C:/FileIO/source.dat";

String strDestinationFile="C:/FileIO/dest.dat";

 try

{

FileInputStream fin = new FileInputStream(strSourceFile); FileOutputStream fout = new FileOutputStream(strDestinationFile);

byte[] b = new byte[1024];

int noOfBytes = 0;                     

System.out.println("Copying file using streams");

while( (noOfBytes = fin.read(b)) != -1 )

{

fout.write(b, 0, noOfBytes);

}

System.out.println("File copied!");

fin.close();

fout.close();                  

}

catch(FileNotFoundException fnf)

{

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

}

catch(IOException ioe)

{

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

     }

  }

}

Create File Output Stream object from File object

import java.io.*;

public class CreateFileOutputStreamObjectFromFile

{

public static void main(String[] args)

{

File file = new File("C://FileIO//demo.txt");

try

{

FileOutputStream fos = new FileOutputStream(file);

}

catch(FileNotFoundException ex)

{

System.out.println("Exception : " + ex);

      }

   }

}

Create File Output Stream object from String file path

import java.io.*;

public class CreateFileOutputStreamObjectFromString

{

 public static void main(String[] args)

{

String strFilePath = "C://FileIO//demo.txt";

try

{

FileOutputStream fos = new FileOutputStream(strFilePath);

}

catch(FileNotFoundException ex)

{

System.out.println("Exception : " + ex);

     }

   }

}