Android Array Reverse reverse(int[] array)

Description

Reverses the order of the given array.

This method does nothing for a null input array.

License

Apache License

Parameter

Parameter	Description
array	the array to reverse, may be <code>null</code>

Declaration

public static void reverse(int[] array) 

Method Source Code

//package com.java2s;
/*/*from w  ww .  ja  va2s  . 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 {
    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>There is no special handling for multi-dimensional arrays.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(Object[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        Object tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(long[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        long tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(int[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        int tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(short[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        short tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(char[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        char tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(byte[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        byte tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(double[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        double tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(float[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        float tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }

    /**
     * <p>Reverses the order of the given array.</p>
     *
     * <p>This method does nothing for a <code>null</code> input array.</p>
     *
     * @param array  the array to reverse, may be <code>null</code>
     */
    public static void reverse(boolean[] array) {
        if (array == null) {
            return;
        }
        int i = 0;
        int j = array.length - 1;
        boolean tmp;
        while (j > i) {
            tmp = array[j];
            array[j] = array[i];
            array[i] = tmp;
            j--;
            i++;
        }
    }
}

Related

1. reverse(final long[] pArray)
2. reverse(final long[] pArray)
3. reverse(final short[] pArray)
4. reverse(final short[] pArray)
5. reverse(float[] array)
6. reverse(long[] array)
7. reverse(short[] array)