Java Streams and Files – I & II

 

JAVA

Streams and Files – I & II

 

Fill in the blanks

 

1.Java implements streams within class hierarchies defined in the java.io package.

2.getParent() method returns the name of the parent directory.

3.Write a method of Creating Directory mkdir()

4.Write a function for allows a buffer in memory inputstream ByteArrayInputStream

5.Write a function for reading information from a file FileInputStream

6.Write a function for converting  a string into an InputStream  StringBufferInputStream

7.FileStream consist of FileInputStream and FileOutputStream

8.CharArrayWriter is an implementation of an output stream that uses an array as the destination

               

Answer the Following Questions

                                                                (4 marks)

       1.Write  a program for FileInputStream using try … catch block.

import java.io.*; 

public class ReadBytes { 

     public static void main(String args[]){   

          try{   

            FileInputStream fin=new FileInputStream("E:/ja/city.txt");   

            int i=0;   

            while((i=fin.read())!=-1){   

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

            }   

            fin.close();   

          }catch(Exception e){System.out.println(e);}   

         }   

        } 

       2.Write a program for File using getName(),getParent(),exists(),isFile(),isAbsolute() function.

import java.io.File;

class FileDemo{

     static void p(String s){

         System.out.println(s);

}

public static void main(String args[]){

File f1=new File("C:/Program Files/Java/jdk1.8.0_181/COPYRIGHT");

p("File Name:"+f1.getName());

p("Path:"+f1.getPath());

p("Abs Path:"+f1.getAbsolutePath());

p("Parent:"+f1.getParent());

p(f1.exists()?"exists":"does not exist");   

p(f1.canWrite()?"isWriteable": "is not readable ");

p(f1.canRead()?"isreadable":"is not readable");

p("is"+(f1.isDirectory()?"":"not"+"a directory"));

p(f1.isFile()?"is normal file":"might be a named pipe");

p(f1.isAbsolute()?"is absolute":"is not absolute");

p("File last modified:"+f1.lastModified());

p("File size:"+f1.length()+"Bytes");

    }

}

       Answer the Following Questions

                                                                (10 marks)

       1.Write a program to accept a specific number of character as input and Convert them into Upper case Character.

File name: ByteArray.java

import java.io.*;

class ByteArray

{

public static void main (String args[])throws Exception

{

ByteArrayOutputStream  f=new ByteArrayOutputStream(12);

System.out.println("Enter 10 characters and press the enter key");

System.out.println("These will be converted to uppercase and displayed");

while(f.size()!=10)

{

  f.write(System.in.read());

  }

 System.out.println("Accepted characters into an array");

 byte b[]= f.toByteArray();

 System.out.println("Displaying characters in the array");

 for(int l= 0;l<b.length;l++)

 {

 System.out.println((char)b[l]);

 }

ByteArrayInputStream inp=new ByteArrayInputStream(b);

int c;

 System.out.println("Converted to uppercase characters");

 for (int i=0;i<1;i++)

 {

while ((c = inp.read())!=-1)

{

System.out.println(Character.toUpperCase((char)c));

}

System.out.println();

 inp.reset();                      

 }

 }

 }