Android Open Source - khandroid String Utils

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2012-2014 Ognyan Bankov
 */*from  w  ww .j a  v a  2s . c  o  m*/
 * 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.
 */

package com.github.khandroid.misc;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class StringUtils {
    public static String md5(String s) {

        MessageDigest m = null;

        try {
            m = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }

        m.update(s.getBytes());

        String hash = new BigInteger(1, m.digest()).toString(16);

        return hash;
    }


    public static String md5(long l) {
        return md5(Long.toString(l));
    }


    public static String md5(int i) {
        return md5(Integer.toString(i));
    }


    public static boolean isEmpty(String str) {
        if (str == null) {
            return true;
        }
        String trimmedString = str.trim();
        if ("".equals(trimmedString)) {
            return true;
        }
        return false;
    }


    public static boolean isNotEmpty(String str) {
        return !isEmpty(str);
    }
}

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