find zip file length lessthen 5MB

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class Zipingfile {
    BufferedReader readkeyboard=new BufferedReader(new InputStreamReader(System.in));
    public static int buffer = 5242890;
    String source,detination;
    long overallSize = 0;
    public void zipingfile() { 
        try {
            System.out.println("Enter source path :");
            source=readkeyboard.readLine();                     
            //creating ziping
            File folder = new File(source);
            if(folder.exists()) {        
                System.out.println("Enter Destination path :");
                detination=readkeyboard.readLine();

            File[] files = folder.listFiles();
            File zipedfile=new File(detination);
            byte binarybits[] = new byte[buffer];
            FileOutputStream writefile = new FileOutputStream(zipedfile);
            ZipOutputStream zip = new ZipOutputStream(writefile);

            for (int i = 0; i < files.length; i++) {                
                //if (files[i] == null || !files[i].exists()|| files[i].isDirectory())  
                //System.out.println();
                ZipEntry addFiles = new ZipEntry(files[i].getName());
                addFiles.setTime(files[i].lastModified());
                overallSize+=zipedfile.length();
                //if(files[i].length() >= buffer) {
                //continue;
                //}
                zip.putNextEntry(addFiles);
                if(overallSize < buffer) { 
                //zip.putNextEntry(new ZipEntry(files[i].getName()));

                FileInputStream readfile = new FileInputStream(files[i]);
                while (true) {
                    System.out.println("infiniti loopppp");
                  int filelen = readfile.read(binarybits, 0, binarybits.length);
                 // System.out.println(">>>>>>>>"+filelen);
                  //if file is empty or >5mb
                  if (filelen <= 0)                   
                      break;
                  zip.write(binarybits, 0, filelen);
                  }
                readfile.close();
                }
                 else{
                        System.out.println("zip file morethan 5MB zip is not possible");
                        //zip=null;
                        /*for (File file : files)
                            {
                            // Delete each file

                            if (!file.delete())
                            {
                            // Failed to delete file

                            System.out.println("Failed to delete "+file);
                            }
                            } */
                    //  zip.delete();
                        return;
                    }
            }           
              System.out.println("Zip File is created successfully.");
              System.out.println("File Name: " + zipedfile.getName());
              System.out.println("Destination path : " + zipedfile.getPath());
              //int size= zipedfile.length()*1024*1024;
              System.out.println("File size: " + zipedfile.length() + "bytes ");
              zip.close();
              writefile.close();


            }else {
                System.out.println("file doesn't exist");
            }
        } catch(IOException io){
            io.printStackTrace();
        }       
    }
public static void main(String[] args) {        
        Zipingfile filezip=new Zipingfile();
        filezip.zipingfile();
    }
}