How to best get filecount of a rar compressed file

[Max Winfield]

Here a solution how to count files in a rar. [Emptyfiles (filesize = 0 Bytes) are not considered files in this solution and will not be counted]

[Point 8 at the end has the usable code]

1. Got at https://github.com/radarsh/raroscope RARFile.java and RAREntry.java and i think import java.io.IOException; import java.util.Enumeration; are needed as well.
2. Added them to my Project
3. Their Code Sample

   // Construct the RARFile object using the file path

   RARFile file = new RARFile("D:/Data.rar");
   
   // Get the handle to the Enumeration

   Enumeration<RAREntry> entries = file.entries();
   
   // Iterate and print

   while (entries.hasMoreElements()) {
       RAREntry entry = entries.nextElement();
   
       System.out.println(entry.getName());
   }

4. What i did was instead of entry.getName()); i used entry.getSize() and you get, if several files are in a folder, a long value with the bytesize for every single file contained.

5. The Problem was that if the rar contains folders those folder would be given out as well with value 0.

Example Output of a rar file:

   0
   2324866
   2044679
   2268156

As you can see 3 files and 1 Folder (Size 0)

6. i wrote to check in between the loop which gets the values of each file to check if long is != 0 and then count with a counting variable:

   long n = entry.getSize();
   if (n != 0) {m++;}
   System.out.println(m);

7. This gives you the filecount (empty files are not considered though, which in my case isnt important)!

8. Final Code Example: only "c:/test.rar" in line 1 must be set to desired .rar or file array containing rar File. Variable m gives you the file count. Dont forget to have the 2 raroscape classes in your project though, because they are needed. (See point 1 further up)

    			import java.io.IOException;
    			import java.util.Enumeration;

    			public class RarFileCount {

    			public static void main(String[] args) {
    			try {RARFile file = new RARFile("c:/test.rar");
     			Enumeration<RAREntry> entries = file.entries();
     			int m=0;
    			while (entries.hasMoreElements()) {
     			RAREntry entry = entries.nextElement();

                long n = entry.getSize();

                if (n != 0) {
                m++;
                }
                }
                System.out.println(m);

                file.close();
                } catch (IOException ioe) {
                System.out.println("Error opening rar file" + ioe);
                }
                }}}

[Carey Brown]

RAREntry has all these fields, surely 'directory' is the one you're looking for.

public class RAREntry {
    private String name;

    private Date time;

    private long size;

    private long compressedSize;

    private long crc;

    private boolean directory;

    private String hostOS;

    private String method;

private String version;

P.S.
A legitimate file can be zero bytes in length.

[Max Winfield]

THANK YOU Carey Brown for pointing out the .isDirectory() method. I was so fixated on getting the filecount that i didnt think about the reverse way to check for Directory.

Here a solution how to count files in a rar and put it in a int variable.

[Point 4 at the end has the usable code]

1. Go to https://github.com/radarsh/raroscope and get RARFile.java and RAREntry.java
2. Add them to your Project in the same package in which the class is that does the counting
3. Their Code Sample

   // Construct the RARFile object using the file path

   RARFile file = new RARFile("D:/Data.rar");
   
   // Get the handle to the Enumeration

   Enumeration<RAREntry> entries = file.entries();
   
   // Iterate and print

   while (entries.hasMoreElements()) {
       RAREntry entry = entries.nextElement();
   
       System.out.println(entry.getName());
   }

4.

        import java.io.IOException;
        import java.util.Enumeration;

        public class Test {
	    public static void main(String[] args) {
		
		int numberOfFilesinRar = 0;
		try {RARFile rarfile = new RARFile("C:/test.rar");
		Enumeration<RAREntry> entries = rarfile.entries();
		while (entries.hasMoreElements()) {
		RAREntry entry = entries.nextElement();

		boolean isDirectory = entry.isDirectory();

		if (isDirectory == false) {numberOfFilesinRar++;}}

		rarfile.close();

		System.out.println(numberOfFilesinRar);

		} catch (IOException ie) 
		{System.out.println("Error opening rar file" + ie);}
	    }
        }

[Knute Snortum]

A matter of style here:  This code

boolean isDirectory = entry.isDirectory();
if (isDirectory == false) {numberOfFilesinRar++;}}

can be shortened to

boolean isDirectory = entry.isDirectory();
if (!isDirectory) {numberOfFilesinRar++;}}

or perhaps even better

if (!entry.isDirectory()) {numberOfFilesinRar++;}}

[Knute Snortum]

The formatting of your code is poor.  This is considered a bug by many, myself included.  See how much clearer your code is properly formatted:

import java.io.IOException;
import java.util.Enumeration;

public class Test {
	public static void main(String[] args) {

		int numberOfFilesinRar = 0;
		try (RARFile rarfile = new RARFile("C:/test.rar")) {
			Enumeration<RAREntry> entries = rarfile.entries();
			
			while (entries.hasMoreElements()) {
				RAREntry entry = entries.nextElement();

				if (!entry.isDirectory()) {
					numberOfFilesinRar++;
				}
			}

			System.out.println(numberOfFilesinRar);

		} catch (IOException ie) {
			System.out.println("Error opening rar file" + ie);
		}
	}
}

I also used the try/resources form of try catch so you don't need to explicitly close the RARFile.