What is the most efficient way of calculating MD5 checksum hash without using JNI?
			

			

			This is the only pure java code I found so far...
			

			

			import java.security.*;
			

			import java.io.*;
			

			

			public class jmd5sum
			

			{
			

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

			if (args.length != 1) {
			

			System.err.println("Usage: java jmd5sum
			");
			

			System.exit(1);
			

			}
			

			

			BufferedInputStream bis = new BufferedInputStream(new FileInputStream(args[0]));
			

			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			

			int c;
			

			while ((c = bis.read()) > -1) {
			

			baos.write(c);
			

			}
			

			bis.close();
			

			byte[] buf = baos.toByteArray();
			

			

			MessageDigest md = MessageDigest.getInstance("MD5");
			

			md.update(buf);
			

			byte[] digest = md.digest();
			

			

			int decValue;
			

			for (int i=0; i
			

			if (digest[i] >= 0)
			

			decValue = digest[i];
			

			else
			

			decValue = 256 + digest[i];
			

			

			String hexVal = Integer.toHexString(decValue);
			

			if (hexVal.length() == 1) hexVal = "0" + hexVal; //prefix a zero to look uniformed;
			

			System.out.print(hexVal + " ");
			

			}
			

			System.out.print(" "+ args[0]);
			

			}
			

			}