Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.commons.text; /** * <p> * Commonly used implementations of {@link CharacterPredicate}. Per the interface * requirements, all implementations are thread safe. * </p> * * @since 1.0 */ public enum CharacterPredicates implements CharacterPredicate { /** * Tests code points against {@link Character#isLetter(int)}. * * @since 1.0 */ LETTERS { @Override public boolean test(int codePoint) { return Character.isLetter(codePoint); } }, /** * Tests code points against {@link Character#isDigit(int)}. * * @since 1.0 */ DIGITS { @Override public boolean test(int codePoint) { return Character.isDigit(codePoint); } } }