split.java

package com.navdeep;

import java.io.*;
import java.util.Scanner;

public class split {
	public void runn(String f) {
		try {
			// Reading file and getting no. of files to be generated
			String inputfile = "D://navdeep/New file/" + f; // Source File Name.
			double nol = 799999.0; // No. of lines to be split and saved in
									// each output file.
			File file = new File(inputfile);
			Scanner scanner = new Scanner(file);
			int count = 0;
			System.out.println("-->Read started<--");
			while (scanner.hasNextLine()) {
				scanner.nextLine();
				count++;
			}
			System.out.println("-->>>>>>Read ends here<<<<<<<--");

			System.out.println("Lines in the file: " + count); // Displays no.
																// of lines in
																// the input
																// file.

			double temp = (count / nol);
			int temp1 = (int) temp;
			int nof = 0;
			if (temp1 == temp) {
				nof = temp1;
			} else {
				nof = temp1 + 1;
			}
			System.out.println("No. of files to be generated :" + nof); // Displays
																		// no.
																		// of
																		// files
																		// to be
																		// generated.
			System.out.println("File:" + f);
			// Actual splitting of file into smaller files
			FileInputStream fstream = new FileInputStream(inputfile);
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			String strLine;
			for (int j = 1; j <= nof; j++) {
				FileWriter fstream1 = new FileWriter(
						"D://navdeep/New file/Splitted_File" + j + ".txt"); // Destination
																			// File
																			// Location
				BufferedWriter out = new BufferedWriter(fstream1);
				for (int i = 1; i <= nol; i++) {
					strLine = br.readLine();
					if (strLine != null) {
						out.write(strLine);
						if (i != nol) {
							out.newLine();
						}
					}
				}
				out.close();
			}

			in.close();
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
		System.out.println("This Process ends here");
	}

}