Exercises Java with Examples-
Practice Exercises Java 4,5 5 302940

Mix and sort files - Practice Exercises Java


Lesson 11:

Dynamic memory management


Exercise 11.11:

Mix and sort files


Objetive:

Create a program to read the content of two different files and display it mixed and sorted alphabetically. For example, if the files contain

Dog
Cat
and

Chair
Table

it should display

Cat
Chair
Dog
Table


Source Code:


package Text;
import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
		System.out.print("Enter name of file1: ");
		String nameFile1 = new Scanner(System.in).nextLine();

		System.out.print("Enter name of file2: ");
		String nameFile2 = new Scanner(System.in).nextLine();

		if ((!(new java.io.File(nameFile1)).isFile()) || (!(new java.io.File(nameFile2)).isFile()))
		{
			System.out.print("File 1 or File 2 not exists");
			return;
		}

		try
		{
			java.io.FileReader myfile = new java.io.FileReader(nameFile1);
		java.io.BufferedReader myfileBufferedReader = new java.io.BufferedReader(myfile);

			ArrayList list = new ArrayList();

			String line;
			do
			{
				line = myfileBufferedReader.readLine();
				if (line != null)
				{
					list.add(line);
				}
			} while (line != null);

			myfile.close();

			myfile = new java.io.FileReader(nameFile2);

			line = "";

			do
			{
				line = myfileBufferedReader.readLine();
				if (line != null)
				{
					list.add(line);
				}
			} while (line != null);

			myfile.close();

			Collections.sort(list);

			for (int i = 0; i < list.size(); i++)
			{
				System.out.println(list.get(i));
			}
		}
		catch (RuntimeException e)
		{
			System.out.println("Error al intentar abir el fichero.");
		}
	}
}
Exercisey 11.11

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