ReadTextFile.java

package strings;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class ReadTextFile {

	public static void main(String[] args) throws IOException {
		
		    File file = new File("file.txt");
		try (
				FileInputStream fileStream = new FileInputStream(file);
				InputStreamReader input = new InputStreamReader(fileStream);
				BufferedReader reader = new BufferedReader(input);	) {
			
			String line;
			
			// Initializing counters
			int countWord = 0;
			int sentenceCount = 0;
			int characterCount = 0;
			int paragraphCount = 1;
			int whitespaceCount = 0;
			
			// Reading line by line from the file
			while((line = reader.readLine()) != null) {
				if(line.equals("")){
					paragraphCount++;
				}
				
				if(!(line.equals(""))) {
					characterCount += line.length();
					
					// \\s+ is the space delimiter 
					String[] wordList = line.split("\\s+");
					countWord += wordList.length;
					whitespaceCount += countWord - 1;
					
					// [!?.:]+ is the sentence delimiter 
					String[] sentenceList = line.split("[!?.:]+");
					sentenceCount += sentenceList.length;
				}
			}
			System.out.println("Total word count: " + countWord);
			System.out.println("Total number of sentences: " + sentenceCount);
			System.out.println("Total number of characters: " + characterCount);
			System.out.println("Total number of paragraphs: " + paragraphCount);
			System.out.println("Total number of whitespaces: " + whitespaceCount);
			
		} catch (Exception e) {
			System.out.println("Exception: "+e);
			e.printStackTrace();
		}
	}
}