Question

So, now you are asked to write a Java program to process topprobe.dat in the following way: • It deletes the last line containing incomplete data; • It replaces all white space delimiters on all lines with commas; • And it separates the three TCP flows based on their source port numbers (the source IP addresses are useless here because all three TCP flows were from the same IP) and spills them out into three separate files. Name your Java program Process_TCPProbe_yourinitial.java which must run in the following way: java Process_TCPProbe_yourinitial topprobe.dat topprobe_xxxxx_comma.dat topprobe_yyyy y_comma.dat topprobe_zzzzz_comma.dat The program takes four arguments: one raw data file as input and three output files. Of course, please replace the placeholder xxxxx , yyyyy , and zzzzz with the actual source port numbers in your data file. The following is a sample of one of the output files for your reference: 93.324970324,10.10.1.2:51205,10.10.2.2:5001,32,0x72e71882,0x72e6a762,20,15,341760,165 ,29312 93.337148466,10.10.1.2:51205,10.10.2.2:5001,32,0x72e71882,0x72e6ad0a, 20,15,341760,165 ,29312 93.349120821,10.10.1.2:51205, 10.10.2.2:5001,32,0x72e723d2,0x72e6b2b2,20,15,341760,166 ,29312

Sample from my tcpprobe.dat file to use for testing (Ignore that giant gap its all supposed to be one block):

*Note* xxxxx=51811, yyyyy = 51812, zzzzz = 51810 according to the data below

33.530532341 10.10.1.2:51811 10.10.2.2:5001 32 0x7ef44c9e 0x7ef3db7e 21 15 185856 193 29312
33.542474133 10.10.1.2:51811 10.10.2.2:5001 32 0x7ef457ee 0x7ef3e126 21 15 185856 193 29312
33.554576589 10.10.1.2:51811 10.10.2.2:5001 32 0x7ef457ee 0x7ef3e6ce 21 15 185856 194 29312
33.566356665 10.10.1.2:51811 10.10.2.2:5001 32 0x7ef4633e 0x7ef3ec76 21 15 185856 194 29312
33.578419057 10.10.1.2:51811 10.10.2.2:5001 32 0x7ef4633e 0x7ef3f21e 21 15 185856 195 29312

33.818567133 10.10.1.2:51812 10.10.2.2:5001 32 0x27767e39 0x2775eb29 27 19 336000 195 29312
33.830336654 10.10.1.2:51812 10.10.2.2:5001 32 0x27768989 0x2775f0d1 27 19 336000 195 29312
33.854344478 10.10.1.2:51812 10.10.2.2:5001 32 0x27768989 0x2775f679 27 19 336000 196 29312
33.878463548 10.10.1.2:51812 10.10.2.2:5001 32 0x277694d9 0x277601c9 27 19 336000 196 29312
33.902536919 10.10.1.2:51812 10.10.2.2:5001 32 0x2776a029 0x27760d19 27 19 336000 196 29312
33.926261724 10.10.1.2:51812 10.10.2.2:5001 32 0x2776ab79 0x27761869 27 19 336000 196 29312
33.950479934 10.10.1.2:51812 10.10.2.2:5001 32 0x2776b6c9 0x277623b9 27 19 336000 197 29312
33.962389651 10.10.1.2:51810 10.10.2.2:5001 32 0x38f9ae1 0x38f1e71 22 16 272256 192 29312
33.974309947 10.10.1.2:51810 10.10.2.2:5001 32 0x38f9ae1 0x38f2419 22 16 272256 193 29312
33.986437149 10.10.1.2:51810 10.10.2.2:5001 32 0x38fa631 0x38f29c1 22 16 272256 194 29312
33.998376239 10.10.1.2:51810 10.10.2.2:5001 32 0x38fa631 0x38f2f69 22 16 272256 194 29312
34.010376480 10.10.1.2:51810 10.10.2.2:5001 32 0x38fb181 0x38f3511 22 16 272256 195 29312
34.022182438 10.10.1.2:51810 10.10.2.2:5001 32 0x38fb181 0x38f3ab9 22 16 272256 196 29312
34.034363788 10.10.1.2:51810

Can someone please write this java code. I rate if the code compiles and gives the correct output. Thank you in advance!!

Answer 1

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Screenshot of the Java code:-

import java.io. BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.Scanner; public class Process_TCPProbe_YourInitial{ public static void main(String[] args) throws IOException { //Extracting the port numbers from the file names passed in the arguments String portNumber1 = args[1].substring(9, 14); String portNumber2 = args[2].substring(9, 14); String portNumber 3 = args[3].substring(9, 14); int i = 0; Scanner s = new Scanner(new FileReader(args[0])); 1/Initialising array of contents with length equals to number of lines in the input file String[] contents = new String[18]; while(true) if (i == 18) break; //Skipping the last line of the file //Replaces the whitespace with comma and stores in the string array contents[i] = s.nextLine().replace(" ", ","); i++; } Bufferedwriter bwl = new Bufferedwriter (new FileWriter(args[1])); BufferedWriter bw2 = new BufferedWriter(new FileWriter(args[2])); Bufferedwriter bw3 = new BufferedWriter(new FileWriter(args[3])); //Iterating the array of contents using a for each loop for(String each:contents) //Writing the string to the corresponding file which matches with the portNumber //along with a new line if (each.contains (portNumber1)) { bw1.write(each); bw1.newLine(); else if(each.contains (portNumber2)) { bw2.write(each); bw2.newLine(); } else if(each.contains (portNumber 3)) { bw3.write(each); bw3.newLine(); } 1/This is necessary to finally output the text from the buffer to the corresponding file bw1.flush(); bw2. flush(); bw3. flush(); //Closing all the file reading and writing handles bwl.close(); bw2.close(); bw3.close(); s.close(); } هه

Demo:-

Input:-

0 O X topprobe.dat - Notepad File Edit Format View Help 33.530532341 10.10.1.2:51811 10.10.2.2:5001 32 Ox7ef44c9e Ox7ef3db7e 21 15 33.542474133 10.10.1.2:51811 10.10.2.2:5001 32 Ox7ef457ee Ox7ef3e126 21 15 33.554576589 10.10.1.2:51811 10.10.2.2:5001 32 Ox7ef457 ee Ox7ef3e6ce 21 15 33.566356665 10.10.1.2:51811 10.10.2.2:5001 32 Ox7ef4633e Ox7ef3ec76 21 15 33.578419057 10.10.1.2:51811 10.10.2.2:5001 32 Ox7ef4633e Ox7ef3f21e 21 15 33. 818567133 10.10.1.2:51812 10.10.2.2:5001 32 Ox27767e39 Ox2775eb29 27 19 33.830336654 10.10.1.2:51812 10.10.2.2:5001 32 0x27768989 Ox2775f0d1 27 19 33.854344478 10.10.1.2:51812 10.10.2.2:5001 32 Ox27768989 Ox2775f679 27 19 33.878463548 10.10.1.2:51812 10.10.2.2:5001 32 0x277694d9 Ox27760109 27 19 33.902536919 10.10.1.2:51812 10.10.2.2:5001 32 0x2776a029 0x27760019 27 19 33.926261724 10.10.1.2:51812 10.10.2.2:5001 32 0x2776ab79 0x27761869 27 19 33.950479934 10.10.1.2:51812 10.10.2.2:5001 32 0x2776b6c9 Ox277623b9 27 19 33.962389651 10.10.1.2:51810 10.10.2.2:5001 32 Ox38f9ael Ox38f1e71 22 16 27 33.974309947 10.10.1.2:51810 10.10.2.2:5001 32 Ox38f9ael Ox38f2419 22 16 27 33.986437149 10.10.1.2:51810 10.10.2.2:5001 32 0x38fa631 Ox38f29c1 22 16 27 33.998376239 10.10.1.2:51810 10.10.2.2:5001 32 Ox38fa631 Ox38f2f69 22 16 27 34.010376480 10.10.1.2:51810 10.10.2.2:5001 32 Ox38fb181 Ox38f3511 22 16 27 34.022182438 10.10.1.2:51810 10.10.2.2:5001 32 Ox38fb181 Ox38f3ab9 22 16 27 34.034363788 10.10.1.2:51810

Output of the file tcpprobe_51810_comma.data:-

x topprobe_51810_comma.dat - Notepad File Edit Format View Help 33.962389651,10.10.1.2:51810,10.10.2.2:5001, 32,0x38f9ae1, 0x38f1e71,22,16,27 33.974309947, 10.10.1.2:51810,10.10.2.2:5001, 32,0x38f9ae1, 0x38f2419,22,16,27 33.986437149,10.10.1.2:51810,10.10.2.2:5001, 32,0x38fa631, 0x38f29c1, 22,16,27 33.998376239,10.10.1.2:51810,10.10.2.2:5001, 32,0x38fa631, 0x38f2f69,22,16,27 34.010376480,10.10.1.2:51810, 10.10.2.2:5001, 32,0x38fb181, 0x38f3511, 22,16,27 34.022182438,10.10.1.2:51810,10.10.2.2:5001, 32,0x38fb181, 0x38f3ab9, 22,16,27

Java code to copy:-

import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Process_TCPProbe_YourInitial{

   public static void main(String[] args) throws IOException {
      
       //Extracting the port numbers from the file names passed in the arguments
       String portNumber1 = args[1].substring(9, 14);
       String portNumber2 = args[2].substring(9, 14);
       String portNumber3 = args[3].substring(9, 14);
              
       int i = 0;
       Scanner s = new Scanner(new FileReader(args[0]));
       //Initialising array of contents with length equals to number of lines in the input file
       String[] contents = new String[18];      
       while(true)
       {
           if (i == 18)
               break;//Skipping the last line of the file
           //Replaces the whitespace with comma and stores in the string array
           contents[i] = s.nextLine().replace(" ", ",");
          
           i++;  
       }
      
       BufferedWriter bw1 = new BufferedWriter(new FileWriter(args[1]));
       BufferedWriter bw2 = new BufferedWriter(new FileWriter(args[2]));
       BufferedWriter bw3 = new BufferedWriter(new FileWriter(args[3]));
       //Iterating the array of contents using a for each loop
       for(String each:contents)
       {
           //Writing the string to the corresponding file which matches with the portNumber
           //along with a new line
           if (each.contains(portNumber1))
           {
               bw1.write(each);
               bw1.newLine();
              
           }
           else if(each.contains(portNumber2))
           {
               bw2.write(each);
               bw2.newLine();
              
           }
           else if(each.contains(portNumber3))
           {
               bw3.write(each);
               bw3.newLine();
              
           }
       }
       //This is necessary to finally output the text from the buffer to the corresponding file
       bw1.flush();
       bw2.flush();
       bw3.flush();
      
       //Closing all the file reading and writing handles
       bw1.close();
       bw2.close();
       bw3.close();
       s.close();
   }

}