Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: GNU General Public License 

import java.io.FileInputStream;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    public static String checksum(String path, String algorithm) {
        MessageDigest md = null;

        try {
            md = MessageDigest.getInstance(algorithm);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }

        FileInputStream i = null;

        try {
            i = new FileInputStream(path);
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }

        byte[] buf = new byte[1024];
        int len = 0;

        try {
            while ((len = i.read(buf)) != -1) {
                md.update(buf, 0, len);
            }
        } catch (IOException e) {

        }

        byte[] digest = md.digest();

        // HEX
        StringBuilder sb = new StringBuilder();
        for (byte b : digest) {
            sb.append(Integer.toString((b & 0xff) + 0x100, 16).substring(1));
        }

        return sb.toString();

    }
}