Here you can find the source of toCodePoints(char[] src, int srcOff, int srcLen, int[] dest, int destOff)
public static int toCodePoints(char[] src, int srcOff, int srcLen, int[] dest, int destOff)
//package com.java2s; /*/* w w w .j ava 2 s . c om*/ * 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. */ public class Main { /** Converts a sequence of Java characters to a sequence of unicode code points. * @return the number of code points written to the destination buffer */ public static int toCodePoints(char[] src, int srcOff, int srcLen, int[] dest, int destOff) { if (srcLen < 0) { throw new IllegalArgumentException("srcLen must be >= 0"); } int codePointCount = 0; for (int i = 0; i < srcLen;) { final int cp = Character.codePointAt(src, srcOff + i, srcOff + srcLen); final int charCount = Character.charCount(cp); dest[destOff + codePointCount++] = cp; i += charCount; } return codePointCount; } }