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crawler-commons is a set of reusable Java components that implement functionality common to any web crawler.

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/**
 * Copyright 2016 Crawler-Commons
 *
 * 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 crawlercommons.utils;

/**
 * Util functions for manipulating strings.
 */
public class Strings {

    public static boolean isBlank(final String cs) {
        if (cs == null || cs.isEmpty()) {
            return true;
        }
        for (int i = 0; i < cs.length(); i++) {
            if (Character.isWhitespace(cs.charAt(i)) == false) {
                return false;
            }
        }
        return true;
    }

}