Java String remove from end

//package com.demo2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String str = "demo2s.com";
        String remove = "com";
        System.out.println(removeEnd(str, remove));
    }//w w  w  .java  2s  .c o m

    /**
     * The empty String <code>""</code>.
     * @since 2.0
     */
    public static final String EMPTY = "";

    /**
     * <p>Removes a substring only if it is at the end of a source string,
     * otherwise returns the source string.</p>
     *
     * <p>A <code>null</code> source string will return <code>null</code>.
     * An empty ("") source string will return the empty string.
     * A <code>null</code> search string will return the source string.</p>
     *
     * <pre>
     * removeEnd(null, *)      = null
     * removeEnd("", *)        = ""
     * removeEnd(*, null)      = *
     * removeEnd("www.domain.com", ".com.")  = "www.domain.com"
     * removeEnd("www.domain.com", ".com")   = "www.domain"
     * removeEnd("www.domain.com", "domain") = "www.domain.com"
     * removeEnd("abc", "")    = "abc"
     * </pre>
     *
     * @param str  the source String to search, may be null
     * @param remove  the String to search for and remove, may be null
     * @return the substring with the string removed if found,
     *  <code>null</code> if null String input
     * @since 2.1
     */
    public static String removeEnd(String str, String remove) {
        if (isEmpty(str) || isEmpty(remove)) {
            return str;
        }
        if (str.endsWith(remove)) {
            return str.substring(0, str.length() - remove.length());
        }
        return str;
    }

    /**
     * <p>Checks if a String is empty ("") or null.</p>
     *
     * <pre>
     * isEmpty(null)      = true
     * isEmpty("")        = true
     * isEmpty(" ")       = false
     * isEmpty("bob")     = false
     * isEmpty("  bob  ") = false
     * </pre>
     *
     * <p>NOTE: This method changed in Lang version 2.0.
     * It no longer trims the String.
     * That functionality is available in isBlank().</p>
     *
     * @param str  the String to check, may be null
     * @return <code>true</code> if the String is empty or null
     */
    public static boolean isEmpty(String str) {
        return str == null || str.length() == 0;
    }

}

/*
 * 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.
 */