java-basics/java-programs/SortATextFile.java at master · Sethu1910/java-basics · GitHub

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package misc;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class SortATextFile {

public static void main(String[] args) throws Exception {

String inputfile = "input.txt";

String outputfile = "output.txt";

FileReader fileReader = new FileReader(inputfile);

BufferedReader bufferReader = new BufferedReader(fileReader);

String inputLine;

List<String> lineList = new ArrayList<String>();

while ((inputLine = bufferReader.readLine()) != null) {

lineList.add(inputLine);

}

fileReader.close();

Collections.sort(lineList);

FileWriter fileWriter = new FileWriter(outputfile);

PrintWriter out = new PrintWriter(fileWriter);

for (String outputLine : lineList) {

out.println(outputLine);

}

out.flush();

out.close();

fileWriter.close();

}

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