Exercise 1:

Here we have created a text file and display its name, size and last modification date & time.

import java.io.*;
import java.util.*;
    import java.text.*;

class FileStatistics{
    public static void main(String[] args){
        try{
        File f=new File("c:/data.txt");
        BufferedWriter bw=new BufferedWriter(new FileWriter(f));
        bw.write("Hello World!");
        bw.close();
    String name=f.getName();
        long len=f.length();
        long lastModified=f.lastModified();
        System.out.println("File Name: "+name);
        System.out.println("File Sie: "+len);
        Date d=new Date(lastModified);
        SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy hh:mm");
        System.out.println("File Last Modified: "+sdf.format(d));
        }
        catch(Exception e){
          }
    }
    }

Exercise 2

Here, we have created a text editor such as Notepad and save the file as Quote.txt and ask the user to enter the favorite movie quote. Then write it into the text file and Copy the file contents and save them into a word file 'Quote.doc'. After that, we have displayed the sizes of the two files.

import java.io.*;
import java.util.*;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.usermodel.*;
import org.apache.poi.hwpf.usermodel.Range;
import org.apache.poi.poifs.filesystem.*;
import org.apache.poi.hwpf.extractor.WordExtractor;

class FileStatistics2
{
    static void writeToFile(String content, String path){
        try{
        POIFSFileSystem fs = new POIFSFileSystem();
        DirectoryEntry directory = fs.getRoot();
        directory.createDocument("WordDocument", new ByteArrayInputStream(content.getBytes()));
        FileOutputStream out = new FileOutputStream(path);
        fs.writeFilesystem(out);
        out.close();
        }
        catch(Exception ex) {
        System.out.println(ex.getMessage());
       }
    }
    public static void main(String[] args) 
    {
        File f=new File("c:/Quote.txt");

        try{
        Scanner input=new Scanner(System.in);
        System.out.println("Enter fav movie quote: ");
        String str=input.nextLine();
        BufferedWriter bw=new BufferedWriter(new FileWriter(f,true));

            bw.write(str);
            bw.newLine();
            bw.close();

        BufferedReader br=new BufferedReader(new FileReader(f));
        String s="",st="";
        while((s=br.readLine())!=null){
            st+=s+" ";
        }
        File file=new File("c:/Quote.doc");
             writeToFile(str,file.getPath());
             System.out.println("Text File Size: "+f.length());
             System.out.println("Word File Size: "+file.length());

        }
        catch(Exception e){}
     }
    }

On number 2 I'm getting this errors

FileStatistics2.java:3: error: package org.apache.poi.hwpf does not exist import org.apache.poi.hwpf.HWPFDocument; ^ FileStatistics2.java:4: error: package org.apache.poi.hwpf.usermodel does not exist import org.apache.poi.hwpf.usermodel.*; ^ FileStatistics2.java:5: error: package org.apache.poi.hwpf.usermodel does not exist import org.apache.poi.hwpf.usermodel.Range; ^ FileStatistics2.java:6: error: package org.apache.poi.poifs.filesystem does not exist import org.apache.poi.poifs.filesystem.*; ^ FileStatistics2.java:7: error: package org.apache.poi.hwpf.extractor does not exist import org.apache.poi.hwpf.extractor.WordExtractor; ^ FileStatistics2.java:13: error: cannot find symbol POIFSFileSystem fs = new POIFSFileSystem(); ^ symbol: class POIFSFileSystem location: class FileStatistics2 FileStatistics2.java:13: error: cannot find symbol POIFSFileSystem fs = new POIFSFileSystem(); ^ symbol: class POIFSFileSystem location: class FileStatistics2 FileStatistics2.java:14: error: cannot find symbol DirectoryEntry directory = fs.getRoot(); ^ symbol: class DirectoryEntry location: class FileStatistics2 8 errors