Here you can find the source of calculateNewLength(ByteBuffer source, ByteBuffer target)
private static int calculateNewLength(ByteBuffer source, ByteBuffer target)
//package com.java2s; /*//from w w w .j a v a2 s . c o m * Copyright 2014 the original author or authors. * * 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 java.nio.ByteBuffer; public class Main { private static int threshold = 1073741824; /** * */ private static int calculateNewLength(ByteBuffer source, ByteBuffer target) { long newLength = source.capacity() + (target.limit() - source.remaining()); if (newLength <= threshold) { return (int) newLength; } return -1; } }