JAVA CODE FOR STREAM CUSTOMIZATION-COUNT READER

PROGRAM:

import java.io.*;

public class Streamcustomization extends Reader

{

            Reader in=null;

int  read=0,charCount=0,wordCount=0,lineCount=0;

            boolean whiteSpace=true;

            public void CountReader(Reader r)

            {

                        in=r;

            }

            public int read(char[]array,int off,int len)throws IOException

            {

                        if(array==null)

                        throw new IOException("null array");

                        read=in.read(array,off,len);

                        charCount+=read;

                        char c;

                        for(int i=0;i<read;i++)

                        {

                                    c=array[i];

                                    if(c=='\n')

                                    lineCount++;

                                    if(Character.isWhitespace(c))

                                                whiteSpace=true;

                                    else if(Character.isLetterOrDigit(c) && whiteSpace)

                                    {

                        wordCount++;

                        whiteSpace=false;

                                    }

                        }

                        return read;

            }

            public void close() throws IOException

            {

                        in.close();

            }

            public int getCharCount()

            {

                        return charCount;

            }

           

public int getWordCount()

            {

return wordCount;

            }

            public int getLineCount()

            {

                        return lineCount;

            }

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

            {

                        CountReader cr=new CountReader(new FileReader("lab.java"));

                        char c[]=new char[4096];

                        int read=0;

                        while((read=cr.read(c,0,c.length))!=-1)

                        System.out.println(new String(c,0,read));

                        cr.close();

System.out.println("\n\n Read chars:"+cr.getCharCount()+"\n words:"+cr.getWordCount()+"\n lines:"+cr.getLineCount());

            }

 }

OUTPUT:

class lab

{

public static void main(String args[])

{

System.out.println("welcome to MCA lab");

}

}

 Read chars:18

 words:4

 lines:1