Here you can find the source of charCount(int codePoint)
public static int charCount(int codePoint)
//package com.java2s; /*/*from w ww . jav a 2 s . c om*/ * Copyright 2008 Google Inc. * * 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. */ public class Main { public static final int MIN_SUPPLEMENTARY_CODE_POINT = 0x10000; public static int charCount(int codePoint) { return codePoint >= MIN_SUPPLEMENTARY_CODE_POINT ? 2 : 1; } }