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Answer to Question #6893 in Java | JSP | JSF for Nivas

Question #6893
Please check the below Java code and highlight things that which is wrong in the code and could be improved. Please use Java-style comments (//).

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Collections;
import java.util.Date;
import java.util.Vector;

import org.apache.log4j.helpers.FileWatchdog;

* Simple class that reads in a file - sorts its lines in natural order,
* writes it back out to the given filename and adds a timestamp of when it was sorted
* Program will be called with:
* java TestClass <input_filename> <output_filename>
public class TestClass {

public static void main(String [] args) throws RuntimeException{
boolean OVERWRITE_FILE = true;
//get filename from args
String inputFilename = args[0];
String outputFilename = args[1];

//check usage
if(args.length != 2){
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