Converts an array of Integer into an array of int . - Android java.lang

Android examples for java.lang:array convert

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Description

Converts an array of Integer into an array of int .

Demo Code

/*/*from ww  w.  java 2  s . c  o  m*/
 * This source is part of the
 *      _____  ___   ____
 *  __ / / _ \/ _ | / __/___  _______ _
 * / // / , _/ __ |/ _/_/ _ \/ __/ _ `/
 * \___/_/|_/_/ |_/_/ (_)___/_/  \_, /
 *                              /___/
 * repository.
 *
 * Copyright (C) 2013 Benoit 'BoD' Lubek (BoD@JRAF.org)
 *
 * 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.
 */
//package com.java2s;

public class Main {
    /**
     * Converts an array of {@link Integer} into an array of {@code int}.
     * 
     * @param value The array to convert.
     * @return The newly created array.
     */
    public static int[] unwrap(Integer[] value) {
        if (value == null)
            return null;
        int[] res = new int[value.length];
        for (int i = 0; i < value.length; i++) {
            res[i] = value[i];
        }
        return res;
    }

    /**
     * Converts an array of {@link Long} into an array of {@code long}.
     * 
     * @param value The array to convert.
     * @return The newly created array.
     */
    public static long[] unwrap(Long[] value) {
        if (value == null)
            return null;
        long[] res = new long[value.length];
        for (int i = 0; i < value.length; i++) {
            res[i] = value[i];
        }
        return res;
    }

    /**
     * Converts an array of {@link Double} into an array of {@code double}.
     * 
     * @param value The array to convert.
     * @return The newly created array.
     */
    public static double[] unwrap(Double[] value) {
        if (value == null)
            return null;
        double[] res = new double[value.length];
        for (int i = 0; i < value.length; i++) {
            res[i] = value[i];
        }
        return res;
    }

    /**
     * Converts an array of {@link Float} into an array of {@code float}.
     * 
     * @param value The array to convert.
     * @return The newly created array.
     */
    public static float[] unwrap(Float[] value) {
        if (value == null)
            return null;
        float[] res = new float[value.length];
        for (int i = 0; i < value.length; i++) {
            res[i] = value[i];
        }
        return res;
    }
}

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