Here you can find the source of copyOfRange(final double[] data, final int start, final int end)
| Parameter | Description |
|---|---|
| data | a parameter |
public static final double[] copyOfRange(final double[] data, final int start, final int end)
//package com.java2s; /*// w ww.jav a 2 s . c o m * ==================================================== * Copyright (C) 2013 by Idylwood Technologies, LLC. All rights reserved. * * Developed at Idylwood Technologies, LLC. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * The License should have been distributed to you with the source tree. * If not, it can be found 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. * * Author: Charles Cooper * Date: 2013 * ==================================================== */ public class Main { /** * Behavior is identical to calling data.clone() or Arrays.copyOf(data) * But can be up to 30% faster if the JIT doesn't optimize those functions * @param data * @return */ public static final double[] copyOfRange(final double[] data, final int start, final int end) { if (end > data.length || start < 0) throw new IllegalArgumentException("Bad array bounds!"); final double ret[] = new double[end - start]; for (int i = 0; i < (end - start) / 3; i++) { final int x = i * 3; ret[x] = data[x + start]; ret[x + 1] = data[x + 1 + start]; ret[x + 2] = data[x + 2 + start]; } // Don't care about extra copies if data.length%3==0 ret[ret.length - 2] = data[end - 2]; ret[ret.length - 1] = data[end - 1]; return ret; } }