Comparing the creation time of two jars.

Question

Hi,
My requirement is that i need to compare the creation time of two of the jars and see which one of the jar is the latest.
I did it using the following code i get the output in the form of strings so i cant compare them to find which one is the latest.
import java.io.*;
import java.util.*;
public class FileTest {
     public static void main(String args[]) {
          File devbuild = new File(
                    "\\\\devspace\\dev$\\ReleaseEng\\DEVbuilds\\tw_enterprise\\build\\jboss\\Oracle\\Twelibrary.jar");
          File local = new File(
                    "D:\\jboss-4.2.1.GA\\server\\TWEServer\\Twelibrary.jar");
          Calendar now = Calendar.getInstance();
          int currtime = now.get(Calendar.HOUR_OF_DAY);
          int maxtime = 18;
          System.out.println("Before the while loop");
          while (currtime < maxtime) {
               System.out.println("Inside the while loop");
               if (devbuild.exists()) {
                    try {
                         // get runtime environment and execute child process
                         Runtime systemShell = Runtime.getRuntime();
                         BufferedReader br1 = new BufferedReader(
                                   new InputStreamReader(new FileInputStream(devbuild)));
                         BufferedReader br2 = new BufferedReader(
                                   new InputStreamReader(new FileInputStream(local)));
                         Process output = systemShell.exec("cmd /c dir " + devbuild);
                         Process output1 = systemShell.exec("cmd /c dir " + local);
                         // open reader to get output from process
                         BufferedReader br = new BufferedReader(
                                   new InputStreamReader(output.getInputStream()));
                         BufferedReader br3 = new BufferedReader(
                                   new InputStreamReader(output1.getInputStream()));
                         String out = "";
                         String out1 = "";
                         String line = null;
                         String line1 = null;
                         int step = 1;
                         int step1 = 2;
                         while ((line = br.readLine()) != null) {
                              if (step == 6) {
                                   out = line;
                              step++;
                         } // display process output
                         while ((line1 = br3.readLine()) != null) {
                              if (step1 == 6) {
                                   out1 = line1;
                              step1++;
                         try {
                              out = out.replaceAll(" ", "");
                              out1 = out1.replaceAll(" ", "");
                              System.out.println("CreationDate: "
                                        + out.substring(0, 10));
                              System.out.println("CreationTime: "
                                        + out.substring(10, 16) + "m");
                              System.out.println("CreationDate: "
                                        + out1.substring(0, 10));
                              System.out.println("CreationTime: "
                                        + out1.substring(10, 16) + "m");
                         } catch (StringIndexOutOfBoundsException se) {
                              System.out.println("File not found");
                         //Long modifiedtime = devbuild.lastModified();
                         //long oldtime = old.lastModified();
                         int devbuilddate = Integer.parseInt(out.substring(0, 10));
                         int devbuildtime = Integer.parseInt(out.substring(10, 16));
                         int localbuilddate = Integer.parseInt(out1.substring(0, 10));
                         int localbuildtime = Integer.parseInt(out1.substring(10, 16));
                         if (devbuilddate >= localbuilddate && devbuildtime >= localbuildtime) {
                              System.out.println("The Build date is Later than the one i am having--->");
                              System.exit(6);
                         } else {
                              System.exit(0);
                    } catch (Exception e) {
                         e.printStackTrace();
               if (currtime > maxtime) {
                    System.exit(5);
How can i do it?
Can anyone help me out in this.
Thanks,
Kavipriya.

Answer 1

Hi Clap,
Thanks for ur reply. Let me say you the scenario clearly. We are in the process of automating some of the process. We have builds running daily night and our automation will run using that build.
Currently the build which is getting generated does have manifest in it. For our automation framework we cant suggest adding the manifest. Which will not be agreed.
Our automation will be checking till 10.am. to check whether the build is ready if not it will come out of the loop. If the build is avaialble within 10 then it will take the build and see whetehr the creation date and time of the build and the one i am having locally or different. If diff it will see whether the build generated is latest than the one i am having.
If it so then the process will run.
So hope you got my issue.