Here you can find the source of isProbablyJapanese(char c)
public static boolean isProbablyJapanese(char c)
//package com.java2s; /**// w w w .j a v a 2s. c o m * redpen: a text inspection tool * Copyright (c) 2014-2015 Recruit Technologies Co., Ltd. and contributors * (see CONTRIBUTORS.md) * * 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. */ import static java.lang.Character.UnicodeBlock.*; public class Main { public static boolean isProbablyJapanese(char c) { Character.UnicodeBlock block = Character.UnicodeBlock.of(c); return block == KATAKANA || block == HIRAGANA || block == CJK_UNIFIED_IDEOGRAPHS; } }