Here you can find the source of toCodePoint(char high, char low)
private static int toCodePoint(char high, char low)
//package com.java2s; /******************************************************************************* * Copyright (c) 2005, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * //from w ww. j av a 2 s . c o m *******************************************************************************/ public class Main { public static final int LOW_SURROGATE_MIN_VALUE = 0xDC00; public static final int HIGH_SURROGATE_MIN_VALUE = 0xD800; private static int toCodePoint(char high, char low) { return (high - HIGH_SURROGATE_MIN_VALUE) * 0x400 + (low - LOW_SURROGATE_MIN_VALUE) + 0x10000; } }