Mega Code Archive
Reverses the contents of the array
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/*
* Copyright WizTools.org
* Licensed under the Apache License, Version 2.0:
* http://www.apache.org/licenses/LICENSE-2.0
*/
//package org.wiztools.commons;
import java.util.ArrayList;
import java.util.List;
/**
*
* @author subwiz
*/
public final class ArrayUtil {
/**
* Reverses the contents of the array.
* @param <T>
* @param arr The input array of objects.
*/
public static <T> void reverse(T[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final T tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(boolean[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final boolean tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(byte[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final byte tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(char[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final char tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(short[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final short tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(int[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final int tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(long[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final long tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(float[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final float tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
public static void reverse(double[] arr) {
for(int left=0, right=arr.length-1; left < right; left++, right--) {
final double tmp = arr[left];
arr[left] = arr[right];
arr[right] = tmp;
}
}
}
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