Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f' };

    /** Returns a 32 character string containing a hash of {@code s}. */
    public static String hash(String s) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            byte[] md5bytes = messageDigest.digest(s.getBytes("UTF-8"));
            return bytesToHexString(md5bytes);
        } catch (NoSuchAlgorithmException e) {
            throw new AssertionError(e);
        } catch (UnsupportedEncodingException e) {
            throw new AssertionError(e);
        }
    }

    private static String bytesToHexString(byte[] bytes) {
        char[] digits = DIGITS;
        char[] buf = new char[bytes.length * 2];
        int c = 0;
        for (byte b : bytes) {
            buf[c++] = digits[(b >> 4) & 0xf];
            buf[c++] = digits[b & 0xf];
        }
        return new String(buf);
    }
}