Here you can find the source of toCodePoint(char[] chars)
public static int toCodePoint(char[] chars)
//package com.java2s; /*// w ww . j a v a 2 s.c om * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. 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. For additional information regarding * copyright in this work, please see the NOTICE file in the top level * directory of this distribution. */ public class Main { public static int toCodePoint(char[] chars) { return toCodePoint(chars[0], chars[1]); } public static int toCodePoint(char high, char low) { return ((high - '\uD800') << 10) + (low - '\uDC00') + 0x010000; } }