Java Byte array

Write byte array to a file using File Output Stream

import java.io.*;

public class WriteByteArrayToFile

{

public static void main(String[] args)

{

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

try

{

FileOutputStream fos = new FileOutputStream(strFilePath);

String strContent = "Write File using Java FileOutputStream example !";

fos.write(strContent.getBytes());

fos.close();

      

}

catch(FileNotFoundException ex)

{

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

}

catch(IOException ioe)

{

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

      }

   }

}

Write file using File Output Stream

import java.io.*; 

public class WriteFile

{

public static void main(String[] args)

{

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

try

{

FileOutputStream fos = new FileOutputStream(strFilePath);

byte b = 01;

fos.write(b);

fos.close();

}

catch(FileNotFoundException ex)

{

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

}

catch(IOException ioe)

{

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

     } 

   }

}

Read character from console using Input Stream

import java.io.IOException;

public class ReadCharFromConsoleExample

{

public static void main(String[] args)

 {

int iChar = 0;

System.out.println("Read user input character example");

try

{

System.out.println("Enter a character to continue");

iChar = System.in.read();

System.out.println("Char entered was : " + (char)iChar);

}

catch(IOException e)

{

System.out.println("Error while reading : " + e);

    }

  }

}

Read line of characters from console using Input Stream

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class ReadLineFromConsoleExample

{

public static void main(String[] args)

{

BufferedReader br =

new BufferedReader(new InputStreamReader(System.in));

String strLine = null;

System.out.println("Reading line of characters from console");

System.out.println("Enter exit to quit");

try

{

                         

while( (strLine = br.readLine()) != null)

{

if(strLine.equals("exit"))

break;

System.out.println("Line entered : "  + strLine);

}

br.close();                    

}

catch(Exception e)

{

System.out.println("Error while reading line from console : " + e);

     }

    }

}