Converts an array of primitive chars to objects. This method returns null for a null input array. - Android java.lang

Description

Converts an array of primitive chars to objects. This method returns null for a null input array.

Demo Code

/*//  www.  j  a v a 2s  . co  m
 * 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.
 */
//package com.java2s;

public class Main {
    /**
     * An empty immutable {@code Long} array.
     */
    public static final Long[] EMPTY_LONG_OBJECT_ARRAY = new Long[0];
    /**
     * An empty immutable {@code Integer} array.
     */
    public static final Integer[] EMPTY_INTEGER_OBJECT_ARRAY = new Integer[0];
    /**
     * An empty immutable {@code Short} array.
     */
    public static final Short[] EMPTY_SHORT_OBJECT_ARRAY = new Short[0];
    /**
     * An empty immutable {@code Byte} array.
     */
    public static final Byte[] EMPTY_BYTE_OBJECT_ARRAY = new Byte[0];
    /**
     * An empty immutable {@code Double} array.
     */
    public static final Double[] EMPTY_DOUBLE_OBJECT_ARRAY = new Double[0];
    /**
     * An empty immutable {@code Float} array.
     */
    public static final Float[] EMPTY_FLOAT_OBJECT_ARRAY = new Float[0];
    /**
     * An empty immutable {@code Boolean} array.
     */
    public static final Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY = new Boolean[0];
    /**
     * An empty immutable {@code Character} array.
     */
    public static final Character[] EMPTY_CHARACTER_OBJECT_ARRAY = new Character[0];

    /**
     * <p>Converts an array of primitive chars to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array a {@code char} array
     * @return a {@code Character} array, {@code null} if null array input
     */
    public static Character[] toObject(final char[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_CHARACTER_OBJECT_ARRAY;
        }
        final Character[] result = new Character[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Character.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive longs to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code long} array
     * @return a {@code Long} array, {@code null} if null array input
     */
    public static Long[] toObject(final long[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_LONG_OBJECT_ARRAY;
        }
        final Long[] result = new Long[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Long.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive ints to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  an {@code int} array
     * @return an {@code Integer} array, {@code null} if null array input
     */
    public static Integer[] toObject(final int[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_INTEGER_OBJECT_ARRAY;
        }
        final Integer[] result = new Integer[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Integer.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive shorts to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code short} array
     * @return a {@code Short} array, {@code null} if null array input
     */
    public static Short[] toObject(final short[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_SHORT_OBJECT_ARRAY;
        }
        final Short[] result = new Short[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Short.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive bytes to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code byte} array
     * @return a {@code Byte} array, {@code null} if null array input
     */
    public static Byte[] toObject(final byte[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_BYTE_OBJECT_ARRAY;
        }
        final Byte[] result = new Byte[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Byte.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive doubles to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code double} array
     * @return a {@code Double} array, {@code null} if null array input
     */
    public static Double[] toObject(final double[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_DOUBLE_OBJECT_ARRAY;
        }
        final Double[] result = new Double[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Double.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive floats to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code float} array
     * @return a {@code Float} array, {@code null} if null array input
     */
    public static Float[] toObject(final float[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_FLOAT_OBJECT_ARRAY;
        }
        final Float[] result = new Float[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = Float.valueOf(array[i]);
        }
        return result;
    }

    /**
     * <p>Converts an array of primitive booleans to objects.</p>
     *
     * <p>This method returns {@code null} for a {@code null} input array.</p>
     *
     * @param array  a {@code boolean} array
     * @return a {@code Boolean} array, {@code null} if null array input
     */
    public static Boolean[] toObject(final boolean[] array) {
        if (array == null) {
            return null;
        } else if (array.length == 0) {
            return EMPTY_BOOLEAN_OBJECT_ARRAY;
        }
        final Boolean[] result = new Boolean[array.length];
        for (int i = 0; i < array.length; i++) {
            result[i] = (array[i] ? Boolean.TRUE : Boolean.FALSE);
        }
        return result;
    }
}

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