Java String remove char
public class Main { public static void main(String[] argv) throws Exception { String str = "demo2s.com"; char remove = 'd'; System.out.println(remove(str, remove)); }// w w w . j a v a 2 s.c om /** * <p> * Removes all occurrences of a character from within 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. * </p> * * <pre> * remove(null, *) = null * remove("", *) = "" * remove("queued", 'u') = "qeed" * remove("queued", 'z') = "queued" * </pre> * * @param str * the source String to search, may be null * @param remove * the char to search for and remove, may be null * @return the substring with the char removed if found, <code>null</code> if * null String input * @since 2.1 */ public static String remove(String str, char remove) { if (isEmpty(str) || str.indexOf(remove) == -1) { return str; } char[] chars = str.toCharArray(); int pos = 0; for (int i = 0; i < chars.length; i++) { if (chars[i] != remove) { chars[pos++] = chars[i]; } } return new String(chars, 0, pos); } /** * <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. */