TextReader.java

package textreader;

import java.util.ArrayList;
import java.io.*;

public class TextReader {
 
    public static void main(String[] args) throws FileNotFoundException, IOException {

        //файл має мати назву text.txt
	BufferedReader reader = new BufferedReader(new FileReader("src\\textreader\\text.txt"));
        
        String line = "";
        ArrayList<String> lines = new ArrayList<String>();

        while ((line = reader.readLine()) != null) {
            if (line.compareTo("\n") < 0)
                continue;
            lines.add(line);
        }

        String [] linesAsArray = lines.toArray(new String[lines.size()]);
        
        for(int p = 0; p < lines.size(); p++) {
            for (int j = 0; j < lines.size() - 1; j++) {
                String temp = "";

                if (linesAsArray[j].compareToIgnoreCase(linesAsArray[j + 1]) > 0) {
                    temp = linesAsArray[j];
                    linesAsArray[j] = linesAsArray[j + 1];
                    linesAsArray[j + 1] = temp;
                }
            }
        }

	File crtFile = new File("src\\textreader\\SortedText.txt");
        
	String parentFile = crtFile.getPath();
		
	try(FileWriter writer = new FileWriter(parentFile, false)){
            
            for(int i = 0;i <lines.size(); i++){
                
                writer.write(linesAsArray[i]+"\n");
            }	
            System.out.println("Done!");
        }
        catch(IOException ex){
            System.out.println(ex.getMessage());
        } 
    }
}