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

Search in file - Practice Exercises Java


Lesson 11:

Dynamic memory management


Exercise 11.13:

Search in file


Objetive:

Create a program to read a text file and ask the user for sentences to search in it.

It will read the whole file, store it in an ArrayList, ask the user for a word (or sentence) and display all the lines that contain such word. Then it will ask for another word and so on, until the user enters an empty string.


Source Code:


package Contains;
import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
		java.io.FileReader myfile = new java.io.FileReader("text.txt");
	java.io.BufferedReader myfileBufferedReader = new java.io.BufferedReader(myfile);

		try
		{
			ArrayList list = new ArrayList();
			String line;
			do
			{
				line = myfileBufferedReader.readLine();
				if (line != null)
				{
					list.add(line);
				}
			} while (line != null);
			myfile.close();

			String sentence;
			boolean exit = false;

			do
			{
				System.out.print("Enter word or sentence: ");
				sentence = new Scanner(System.in).nextLine();

				if (sentence.equals(""))
				{
					exit = true;
				}
				else
				{
					for (int i = 0; i < list.size(); i++)
					{
						String sentenceList = (String)list.get(i);

						if (sentenceList.contains(sentence))
						{
							System.out.println(sentenceList);
						}
					}
				}
			} while (!exit);

		}
		catch (RuntimeException e)
		{
			System.out.println("Error, " + e.getMessage());
		}
	}
}
Exercisey 11.13

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