Set file permissions and Buffered Reader and array to input stream in Java

Set file permissions in java

package com.java2novice.files;

import java.io.File;

public class MyFilePermissions

{

          public static void main(String a[])

            {

        File scriptFile = new File("/home/java2novice/test.sh");

        System.out.println("Current file permissions:");

        System.out.println("Can Execute? "+scriptFile.canExecute());

        System.out.println("Can Read? "+scriptFile.canRead());

        System.out.println("Can Write? "+scriptFile.canWrite());

        scriptFile.setExecutable(true);

        scriptFile.setReadable(true);

        scriptFile.setWritable(true);

        System.out.println("Now file permissions:");

        System.out.println("Can Execute? "+scriptFile.canExecute());

        System.out.println("Can Read? "+scriptFile.canRead());

        System.out.println("Can Write? "+scriptFile.canWrite());

    }

}

Convert byte array to reader or Buffered Reader

package com.java2novice.files;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

public class MyByteArrayToReader

{

     public static void main(String a[])

     {

            String str = "converting to input stream"+"\n and this is second line";

                   byte[] content = str.getBytes();

        InputStream is = null;

        BufferedReader bfReader = null;

        try

          {

            is = new ByteArrayInputStream(content);

            bfReader = new BufferedReader(new InputStreamReader(is));

            String temp = null;

            while((temp = bfReader.readLine()) != null)

              {

                System.out.println(temp);

            }

        }

         catch (IOException e)

          {

            e.printStackTrace();

        }

           finally

           {

            try

            {

                if(is != null) is.close();

            }

            catch (Exception ex){}

        }

    }

}

Convert input stream to reader or Buffered Reader

package com.java2novice.files;

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

 public class MyIstoBr

{

 public static void main(String a[])

{  

        InputStream is = null;

        BufferedReader bfReader = null;

        try

           {

            is = new FileInputStream("C:/sample.txt");

            bfReader = new BufferedReader(new InputStreamReader(is));

            String temp = null;

            while((temp = bfReader.readLine()) != null)

             {

                System.out.println(temp);

            }

        }

         catch (FileNotFoundException e)

           {

                   e.printStackTrace();

        }

        catch (IOException e)

          {

            e.printStackTrace();

        }

    }

}

Convert byte array to input stream

package com.java2novice.files;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import java.io.InputStream;

public class ByteArrToInputStream

{

public static void main(String a[])

{

        String str = "converting to input stream";

        byte[] content = str.getBytes();

        int size = content.length;

        InputStream is = null;

        byte[] b = new byte[size];

        try

           {

            is = new ByteArrayInputStream(content);

            is.read(b);

            System.out.println("Data Recovered: "+new String(b));

        }

         catch (IOException e)

       {

            e.printStackTrace();

        }

         finally

          {

            try

              {

                if(is != null) is.close();

            }

         catch (Exception ex){}

        }

     }

}