java.lang.Object
- de.jungblut.datastructure.ArrayUtils

```
public final class ArrayUtils
extends java.lang.Object
```
Array utils for stuff that isn't included in Arrays.

Author:

thomas.jungblut

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static double[]`	`concat(double[]... arrays)`	Concats the given arrays.
`static int[]`	`concat(int[]... arrays)`	Concats the given arrays.
`static long[]`	`concat(long[]... arrays)`	Concats the given arrays.
`static <T> T[]`	`concat(T[]... arrays)`	Concats the given arrays.
`static double[]`	`copy(double[] array)`	Copies the given array into a new one.
`static int[]`	`copy(int[] array)`	Copies the given array into a new one.
`static long[]`	`copy(long[] array)`	Copies the given array into a new one.
`static <T> T[]`	`copy(T[] array)`	Copies the given array into a new one.
`static void`	`countingSort(int[] a, int low, int high)`	Counting sort that sorts the integer array in O(n+k) where n is the number of elements and k is the length of the integer intervals given (high - low).
`static byte[]`	`create(byte... arrays)`	Creates the given array from a varargs parameter.
`static double[]`	`create(double... arrays)`	Creates the given array from a varargs parameter.
`static int[]`	`create(int... arrays)`	Creates the given array from a varargs parameter.
`static long[]`	`create(long... arrays)`	Creates the given array from a varargs parameter.
`static <T> T[]`	`create(T... arrays)`	Creates the given array from a varargs parameter.
`static int[]`	`deduplicate(int[] arr)`	Deduplicates an array in linear time, it does not change the order of the elements.
`static <T> java.util.ArrayList<T>`	`deduplicate(T[] arr)`	Deduplicates an array in linear time, it does not change the order of the elements.
`static int`	`find(int[] array, int key)`	Finds the occurence of the given key in the given array.
`static int`	`find(long[] array, long key)`	Finds the occurence of the given key in the given array.
`static <T> int`	`find(T[] array, T key)`	Finds the occurence of the given key in the given array.
`static double[]`	`fromUpTo(double from, double to, double stepsize)`	Creates a double array from the given start up to a end number with a stepsize.
`static int[]`	`fromUpTo(int from, int to, int stepsize)`	Creates an integer array from the given start up to a end number with a stepsize.
`static long[]`	`fromUpTo(long from, long to, long stepsize)`	Creates a long array from the given start up to a end number with a stepsize.
`static int[]`	`intersection(int[] arr, int[] arr2)`	Computes the intersection of two sorted arrays.
`static int[]`	`intersectionUnsorted(int[] arr, int[] arr2)`	Computes the intersection of two unsorted arrays.
`static boolean`	`isValidIndex(boolean[] array, int index)`
`static boolean`	`isValidIndex(byte[] array, int index)`
`static boolean`	`isValidIndex(double[] array, int index)`
`static boolean`	`isValidIndex(float[] array, int index)`
`static boolean`	`isValidIndex(int[] array, int index)`
`static boolean`	`isValidIndex(long[] array, int index)`
`static <T> boolean`	`isValidIndex(T[] array, int index)`
`static double`	`max(double[] array)`
`static int`	`max(int[] array)`
`static long`	`max(long[] array)`
`static int`	`maxIndex(double[] array)`
`static int`	`maxIndex(int[] array)`
`static int`	`maxIndex(long[] array)`
`static int`	`medianOfMedians(int[] array)`	Finds the median of medians in the given array.
`static int[]`	`merge(int[] a, int[] b)`	Merges two sorted arrays to a single new array.
`static void`	`merge(int[] numbers, int startIndexA, int endIndexA, int endIndexB)`	Merges two sorted subparts of the given number array.
`static double`	`min(double[] array)`
`static int`	`min(int[] array)`
`static long`	`min(long[] array)`
`static int`	`minIndex(double[] array)`
`static int`	`minIndex(int[] array)`
`static int`	`minIndex(long[] array)`
`static int`	`missingNumber(int[] array)`	If array contains unique integers in a range between 0 and n-1, this function finds the only one missing in linear time and constant memory.
`static void`	`multiQuickSort(int[]... arrays)`	Multi-sorts the given arrays with the quicksort algorithm.
`static void`	`multiQuickSort(int sortDimension, int[]... arrays)`	Multi-sorts the given arrays with the quicksort algorithm.
`static <T extends java.lang.Comparable<T>> void`	`multiQuickSort(int sortDimension, T[]... arrays)`	Multi-sorts the given arrays with the quicksort algorithm.
`static <T extends java.lang.Comparable<T>> void`	`multiQuickSort(T[]... arrays)`	Multi-sorts the given arrays with the quicksort algorithm.
`static <T> T[]`	`multiShuffle(T[] array, java.util.Random rnd, T[]... additions)`	Shuffles the given array with the given random function.
`static <T> T[]`	`multiShuffle(T[] array, T[]... additions)`	Shuffles the given array.
`static int`	`partition(double[] array)`	Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`partition(double[] array, int start, int end)`	Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`partition(int[] array)`	Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`partition(int[] array, int start, int end)`	Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`partition(long[] array)`	Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`partition(long[] array, int start, int end)`	Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static <T extends java.lang.Comparable<T>> int`	`partition(T[] array)`	Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static <T extends java.lang.Comparable<T>> int`	`partition(T[] array, int start, int end)`	Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot.
`static int`	`quickSelect(double[] array, int k)`	Selects the kth smallest element in the array in linear time.
`static int`	`quickSelect(double[] array, int start, int end, int k)`	Selects the kth smallest element in the array.
`static int`	`quickSelect(int[] array, int k)`	Selects the kth smallest element in the array in linear time, if the array is smaller than or equal to 10 a radix sort will be used and the kth element will be returned.
`static int`	`quickSelect(int[] array, int start, int end, int k)`	Selects the kth smallest element in the array.
`static int`	`quickSelect(long[] array, int k)`	Selects the kth smallest element in the array in linear time.
`static int`	`quickSelect(long[] array, int start, int end, int k)`	Selects the kth smallest element in the array.
`static <T extends java.lang.Comparable<T>> int`	`quickSelect(T[] array, int k)`	Selects the kth smallest element in the array in linear time.
`static <T extends java.lang.Comparable<T>> int`	`quickSelect(T[] array, int start, int end, int k)`	Selects the kth smallest element in the array.
`static void`	`quickSort(double[] a)`	Quicksorts this array.
`static void`	`quickSort(double[] a, int offset, int length)`	Quicksorts this array.
`static void`	`quickSort(int[] a)`	Quicksorts this array.
`static void`	`quickSort(int[] a, int offset, int length)`	Quicksorts this array.
`static void`	`quickSort(long[] a)`	Quicksorts this array.
`static void`	`quickSort(long[] a, int offset, int length)`	Quicksorts this array.
`static <T extends java.lang.Comparable<T>> void`	`quickSort(T[] a)`	Quicksorts this array.
`static <T extends java.lang.Comparable<T>> void`	`quickSort(T[] a, int offset, int length)`	Quicksorts this array.
`static void`	`radixSort(int[] a)`	Radix sorts an integer array in O(m*n), where m is the length of the key (here 32 bit) and n the number of elements.
`static <T> T[]`	`shuffle(T[] array)`	Shuffles the given array.
`static <T> T[]`	`shuffle(T[] array, java.util.Random rnd)`	Shuffles the given array with the given random function.
`static <T> T[]`	`subArray(T[] array, int splitIndex)`	Splits the given array from 0 to the given splitindex (included).
`static <T> T[]`	`subArray(T[] array, int startIndex, int splitIndex)`	Splits the given array from the given startIndex to the given splitIndex (included).
`static void`	`swap(boolean[] array, int x, int y)`	Swaps the given index x with y in the array.
`static void`	`swap(double[] array, int x, int y)`	Swaps the given index x with y in the array.
`static void`	`swap(int[] array, int x, int y)`	Swaps the given index x with y in the array.
`static void`	`swap(long[] array, int x, int y)`	Swaps the given index x with y in the array.
`static <T> void`	`swap(T[] array, int x, int y)`	Swaps the given index x with y in the array.
`static java.util.List<java.lang.Double>`	`toObjectList(double[] array)`	Converts the given double array to a list of object wrappers.
`static java.util.List<java.lang.Integer>`	`toObjectList(int[] array)`	Converts the given int array to a list of object wrappers.
`static java.util.List<java.lang.Long>`	`toObjectList(long[] array)`	Converts the given long array to a list of object wrappers.
`static double[]`	`toPrimitiveArray(java.lang.Double[] array)`	Converts the given array of object type to its primitive counterpart.
`static int[]`	`toPrimitiveArray(java.lang.Integer[] array)`	Converts the given array of object type to its primitive counterpart.
`static long[]`	`toPrimitiveArray(java.lang.Long[] array)`	Converts the given array of object type to its primitive counterpart.
`static int[]`	`toPrimitiveArray(java.util.List<java.lang.Integer> list)`	Converts the given list of object type to its primitive counterpart.
`static int[]`	`union(int[] a, int[] b)`	Computes the union of two arrays.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - find
```
public static <T> int find(T[] array,
                           T key)
```
    Finds the occurence of the given key in the given array. Linear search, worst case running time is O(n).
    
    Parameters:
    
    array - the array to search.
    
    key - the key to search.
    
    Returns:
    
    -1 if the key wasn't found nowhere, or the index where the key was found.
  - find
```
public static int find(int[] array,
                       int key)
```
    Finds the occurence of the given key in the given array. Linear search, worst case running time is O(n).
    
    Parameters:
    
    array - the array to search.
    
    key - the key to search.
    
    Returns:
    
    -1 if the key wasn't found nowhere, or the index where the key was found.
  - find
```
public static int find(long[] array,
                       long key)
```
    Finds the occurence of the given key in the given array. Linear search, worst case running time is O(n).
    
    Parameters:
    
    array - the array to search.
    
    key - the key to search.
    
    Returns:
    
    -1 if the key wasn't found nowhere, or the index where the key was found.
  - concat
```
public static int[] concat(int[]... arrays)
```
    Concats the given arrays.
    
    Parameters:
    
    arrays - the arrays to pass.
    
    Returns:
    
    a single array where the given arrays content is concatenated.
  - concat
```
public static long[] concat(long[]... arrays)
```
    Concats the given arrays.
    
    Parameters:
    
    arrays - the arrays to pass.
    
    Returns:
    
    a single array where the given arrays content is concatenated.
  - concat
```
public static double[] concat(double[]... arrays)
```
    Concats the given arrays.
    
    Parameters:
    
    arrays - the arrays to pass.
    
    Returns:
    
    a single array where the given arrays content is concatenated.
  - concat
```
public static <T> T[] concat(T[]... arrays)
```
    Concats the given arrays.
    
    Parameters:
    
    arrays - the arrays to pass.
    
    Returns:
    
    a single array where the given arrays content is concatenated.
  - copy
```
public static int[] copy(int[] array)
```
    Copies the given array into a new one.
  - copy
```
public static double[] copy(double[] array)
```
    Copies the given array into a new one.
  - copy
```
public static long[] copy(long[] array)
```
    Copies the given array into a new one.
  - copy
```
public static <T> T[] copy(T[] array)
```
    Copies the given array into a new one.
  - swap
```
public static void swap(int[] array,
                        int x,
                        int y)
```
    Swaps the given index x with y in the array.
  - swap
```
public static void swap(long[] array,
                        int x,
                        int y)
```
    Swaps the given index x with y in the array.
  - swap
```
public static void swap(double[] array,
                        int x,
                        int y)
```
    Swaps the given index x with y in the array.
  - swap
```
public static void swap(boolean[] array,
                        int x,
                        int y)
```
    Swaps the given index x with y in the array.
  - swap
```
public static <T> void swap(T[] array,
                            int x,
                            int y)
```
    Swaps the given index x with y in the array.
  - toPrimitiveArray
```
public static int[] toPrimitiveArray(java.util.List<java.lang.Integer> list)
```
    Converts the given list of object type to its primitive counterpart.
  - toPrimitiveArray
```
public static int[] toPrimitiveArray(java.lang.Integer[] array)
```
    Converts the given array of object type to its primitive counterpart.
  - toPrimitiveArray
```
public static long[] toPrimitiveArray(java.lang.Long[] array)
```
    Converts the given array of object type to its primitive counterpart.
  - toPrimitiveArray
```
public static double[] toPrimitiveArray(java.lang.Double[] array)
```
    Converts the given array of object type to its primitive counterpart.
  - toObjectList
```
public static java.util.List<java.lang.Integer> toObjectList(int[] array)
```
    Converts the given int array to a list of object wrappers.
  - toObjectList
```
public static java.util.List<java.lang.Long> toObjectList(long[] array)
```
    Converts the given long array to a list of object wrappers.
  - toObjectList
```
public static java.util.List<java.lang.Double> toObjectList(double[] array)
```
    Converts the given double array to a list of object wrappers.
  - partition
```
public static <T extends java.lang.Comparable<T>> int partition(T[] array)
```
    Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static <T extends java.lang.Comparable<T>> int partition(T[] array,
                                                                int start,
                                                                int end)
```
    Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(int[] array)
```
    Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(int[] array,
                            int start,
                            int end)
```
    Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(long[] array)
```
    Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(long[] array,
                            int start,
                            int end)
```
    Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(double[] array)
```
    Partitions the given array in-place and uses the last element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - partition
```
public static int partition(double[] array,
                            int start,
                            int end)
```
    Partitions the given array in-place and uses the end element as pivot, everything less than the pivot will be placed left and everything greater will be placed right of the pivot. It returns the index of the pivot element after partitioning.
  - quickSelect
```
public static int quickSelect(int[] array,
                              int k)
```
    Selects the kth smallest element in the array in linear time, if the array is smaller than or equal to 10 a radix sort will be used and the kth element will be returned. So k = 1, will return the absolutely smallest element.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static int quickSelect(int[] array,
                              int start,
                              int end,
                              int k)
```
    Selects the kth smallest element in the array.
    
    Parameters:
    
    start - the index where to start.
    
    end - the index where to end.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static int quickSelect(double[] array,
                              int k)
```
    Selects the kth smallest element in the array in linear time. k = 1, will return the absolutely smallest element.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static int quickSelect(double[] array,
                              int start,
                              int end,
                              int k)
```
    Selects the kth smallest element in the array.
    
    Parameters:
    
    start - the index where to start.
    
    end - the index where to end.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static int quickSelect(long[] array,
                              int k)
```
    Selects the kth smallest element in the array in linear time. k = 1, will return the absolutely smallest element.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static int quickSelect(long[] array,
                              int start,
                              int end,
                              int k)
```
    Selects the kth smallest element in the array.
    
    Parameters:
    
    start - the index where to start.
    
    end - the index where to end.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static <T extends java.lang.Comparable<T>> int quickSelect(T[] array,
                                                                  int k)
```
    Selects the kth smallest element in the array in linear time. k = 1, will return the absolutely smallest element.
    
    Returns:
    
    the kth smallest index of the element.
  - quickSelect
```
public static <T extends java.lang.Comparable<T>> int quickSelect(T[] array,
                                                                  int start,
                                                                  int end,
                                                                  int k)
```
    Selects the kth smallest element in the array.
    
    Parameters:
    
    start - the index where to start.
    
    end - the index where to end.
    
    Returns:
    
    the kth smallest index of the element.
  - medianOfMedians
```
public static int medianOfMedians(int[] array)
```
    Finds the median of medians in the given array.
    
    Returns:
    
    the index of the median of medians.
  - fromUpTo
```
public static int[] fromUpTo(int from,
                             int to,
                             int stepsize)
```
    Creates an integer array from the given start up to a end number with a stepsize.
    
    Parameters:
    
    from - the integer to start with.
    
    to - the integer to end with.
    
    stepsize - the stepsize to take
    
    Returns:
    
    an integer array from start to end incremented by stepsize.
  - fromUpTo
```
public static long[] fromUpTo(long from,
                              long to,
                              long stepsize)
```
    Creates a long array from the given start up to a end number with a stepsize.
    
    Parameters:
    
    from - the long to start with.
    
    to - the long to end with.
    
    stepsize - the stepsize to take
    
    Returns:
    
    a long array from start to end incremented by stepsize.
  - fromUpTo
```
public static double[] fromUpTo(double from,
                                double to,
                                double stepsize)
```
    Creates a double array from the given start up to a end number with a stepsize.
    
    Parameters:
    
    from - the double to start with.
    
    to - the double to end with.
    
    stepsize - the stepsize to take
    
    Returns:
    
    a double array from start to end incremented by stepsize.
  - radixSort
```
public static void radixSort(int[] a)
```
    Radix sorts an integer array in O(m*n), where m is the length of the key (here 32 bit) and n the number of elements. It only works for positive numbers, so please don't come up with negative numbers, it will result in array out of bound exceptions, since they don't have an array index.
  - countingSort
```
public static void countingSort(int[] a,
                                int low,
                                int high)
```
    Counting sort that sorts the integer array in O(n+k) where n is the number of elements and k is the length of the integer intervals given (high - low). So you can imagine that it uses domain knowledge of the contained integers, like the lowest value and the highest. It only works for positive numbers, so please don't come up with negative numbers, it will result in array out of bound exceptions, since they don't have an array index.
  - quickSort
```
public static void quickSort(int[] a)
```
    Quicksorts this array.
  - quickSort
```
public static void quickSort(int[] a,
                             int offset,
                             int length)
```
    Quicksorts this array. With offset and length, this will be recursively called by itself.
  - quickSort
```
public static void quickSort(long[] a)
```
    Quicksorts this array.
  - quickSort
```
public static void quickSort(long[] a,
                             int offset,
                             int length)
```
    Quicksorts this array. With offset and length, this will be recursively called by itself.
  - quickSort
```
public static void quickSort(double[] a)
```
    Quicksorts this array.
  - quickSort
```
public static void quickSort(double[] a,
                             int offset,
                             int length)
```
    Quicksorts this array. With offset and length, this will be recursively called by itself.
  - quickSort
```
public static <T extends java.lang.Comparable<T>> void quickSort(T[] a)
```
    Quicksorts this array.
  - quickSort
```
public static <T extends java.lang.Comparable<T>> void quickSort(T[] a,
                                                                 int offset,
                                                                 int length)
```
    Quicksorts this array. With offset and length, this will be recursively called by itself.
  - multiQuickSort
```
public static void multiQuickSort(int[]... arrays)
```
    Multi-sorts the given arrays with the quicksort algorithm. It assumes that all arrays have the same sizes and it sorts on the first dimension of these arrays. If the given arrays are null or empty, it will do nothing, if just a single array was passed it will sort it via Arrays sort;
  - multiQuickSort
```
public static void multiQuickSort(int sortDimension,
                                  int[]... arrays)
```
    Multi-sorts the given arrays with the quicksort algorithm. It assumes that all arrays have the same sizes and it sorts on the given dimension index (starts with 0) of these arrays. If the given arrays are null or empty, it will do nothing, if just a single array was passed it will sort it via Arrays sort;
  - multiQuickSort
```
@SafeVarargs
public static <T extends java.lang.Comparable<T>> void multiQuickSort(T[]... arrays)
```
    Multi-sorts the given arrays with the quicksort algorithm. It assumes that all arrays have the same sizes and it sorts on the first dimension of these arrays. If the given arrays are null or empty, it will do nothing, if just a single array was passed it will sort it via Arrays sort;
  - multiQuickSort
```
@SafeVarargs
public static <T extends java.lang.Comparable<T>> void multiQuickSort(int sortDimension,
                                                                      T[]... arrays)
```
    Multi-sorts the given arrays with the quicksort algorithm. It assumes that all arrays have the same sizes and it sorts on the given dimension index (starts with 0) of these arrays. If the given arrays are null or empty, it will do nothing, if just a single array was passed it will sort it via Arrays sort;
  - deduplicate
```
public static int[] deduplicate(int[] arr)
```
    Deduplicates an array in linear time, it does not change the order of the elements.
  - deduplicate
```
public static <T> java.util.ArrayList<T> deduplicate(T[] arr)
```
    Deduplicates an array in linear time, it does not change the order of the elements. Note that equals and hashcode must be overridden for this to work.
  - union
```
public static int[] union(int[] a,
                          int[] b)
```
    Computes the union of two arrays.
  - intersection
```
public static int[] intersection(int[] arr,
                                 int[] arr2)
```
    Computes the intersection of two sorted arrays. Will deduplicate the items, so the return is a set of integers.
  - intersectionUnsorted
```
public static int[] intersectionUnsorted(int[] arr,
                                         int[] arr2)
```
    Computes the intersection of two unsorted arrays. Will deduplicate the items, so the return is a set of integers.
  - missingNumber
```
public static int missingNumber(int[] array)
```
    If array contains unique integers in a range between 0 and n-1, this function finds the only one missing in linear time and constant memory. This is more of a typical homework or interview question than of actually use.
    The trick is to sum the items in the array and then calculate the expected sum of the elements, then diff and return the value.
  - min
```
public static int min(int[] array)
```
    Returns:
    
    the min value in this array,
  - minIndex
```
public static int minIndex(int[] array)
```
    Returns:
    
    the minimum index in this array,
  - min
```
public static long min(long[] array)
```
    Returns:
    
    the minimum value in this array,
  - minIndex
```
public static int minIndex(long[] array)
```
    Returns:
    
    the minimum index in this array,
  - min
```
public static double min(double[] array)
```
    Returns:
    
    the minimum value in this array,
  - minIndex
```
public static int minIndex(double[] array)
```
    Returns:
    
    the minimum index in this array,
  - max
```
public static int max(int[] array)
```
    Returns:
    
    the maximum value in this array,
  - maxIndex
```
public static int maxIndex(int[] array)
```
    Returns:
    
    the maximum index in this array,
  - max
```
public static long max(long[] array)
```
    Returns:
    
    the maximum value in this array,
  - maxIndex
```
public static int maxIndex(long[] array)
```
    Returns:
    
    the maximum index in this array,
  - max
```
public static double max(double[] array)
```
    Returns:
    
    the maximum value in this array,
  - maxIndex
```
public static int maxIndex(double[] array)
```
    Returns:
    
    the maximum index in this array,
  - subArray
```
public static <T> T[] subArray(T[] array,
                               int splitIndex)
```
    Splits the given array from 0 to the given splitindex (included).
    
    Returns:
    
    a new array with the same objects in array[0..splitIndex]
  - subArray
```
public static <T> T[] subArray(T[] array,
                               int startIndex,
                               int splitIndex)
```
    Splits the given array from the given startIndex to the given splitIndex (included).
    
    Returns:
    
    a new array with the same objects in array[startIndex..splitIndex]
  - shuffle
```
public static <T> T[] shuffle(T[] array)
```
    Shuffles the given array.
    
    Returns:
    
    mutated parameter array that was shuffled beforehand.
  - shuffle
```
public static <T> T[] shuffle(T[] array,
                              java.util.Random rnd)
```
    Shuffles the given array with the given random function.
    
    Returns:
    
    mutated parameter array that was shuffled beforehand.
  - multiShuffle
```
@SafeVarargs
public static <T> T[] multiShuffle(T[] array,
                                   T[]... additions)
```
    Shuffles the given array.
    
    Returns:
    
    mutated parameter array that was shuffled beforehand.
  - multiShuffle
```
@SafeVarargs
public static <T> T[] multiShuffle(T[] array,
                                   java.util.Random rnd,
                                   T[]... additions)
```
    Shuffles the given array with the given random function.
    
    Returns:
    
    mutated parameter array that was shuffled beforehand.
  - create
```
public static int[] create(int... arrays)
```
    Creates the given array from a varargs parameter.
    
    Parameters:
    
    arrays - the array to create.
    
    Returns:
    
    the inputted stuff as array.
  - create
```
public static long[] create(long... arrays)
```
    Creates the given array from a varargs parameter.
    
    Parameters:
    
    arrays - the array to create.
    
    Returns:
    
    the inputted stuff as array.
  - create
```
public static double[] create(double... arrays)
```
    Creates the given array from a varargs parameter.
    
    Parameters:
    
    arrays - the array to create.
    
    Returns:
    
    the inputted stuff as array.
  - create
```
public static byte[] create(byte... arrays)
```
    Creates the given array from a varargs parameter.
    
    Parameters:
    
    arrays - the array to create.
    
    Returns:
    
    the inputted stuff as array.
  - create
```
@SafeVarargs
public static <T> T[] create(T... arrays)
```
    Creates the given array from a varargs parameter.
    
    Parameters:
    
    arrays - the array to create.
    
    Returns:
    
    the inputted stuff as array.
  - merge
```
public static int[] merge(int[] a,
                          int[] b)
```
    Merges two sorted arrays to a single new array.
    
    Parameters:
    
    a - sorted array.
    
    b - sorted array.
    
    Returns:
    
    a new array that merged both into a new sorted array.
  - merge
```
public static void merge(int[] numbers,
                         int startIndexA,
                         int endIndexA,
                         int endIndexB)
```
    Merges two sorted subparts of the given number array. E.G: if you want to merge { 1, 2, 5, 3, 5, 6, 7 } you have to pass merge(concat, 0, 2, 6), because you are starting at zero, the second sorted array begins at index 3, so it is 3-1=2. The end is the length of the array - 1.
    
    Parameters:
    
    numbers - the array which has two sorted sub arrays.
    
    startIndexA - the start index of the first sorted array.
    
    endIndexA - the end index of the first sorted array.
    
    endIndexB - the end of the second array.
  - isValidIndex
```
public static boolean isValidIndex(int[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static boolean isValidIndex(double[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static boolean isValidIndex(float[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static boolean isValidIndex(long[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static boolean isValidIndex(boolean[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static boolean isValidIndex(byte[] array,
                                   int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).
  - isValidIndex
```
public static <T> boolean isValidIndex(T[] array,
                                       int index)
```
    Returns:
    
    true if the given index is inside the array range between 0 and array.length (exclusive).

Class ArrayUtils

Method Summary

Methods inherited from class java.lang.Object

Method Detail

find

find

find

concat

concat

concat

concat

copy

copy

copy

copy

swap

swap

swap

swap

swap

toPrimitiveArray

toPrimitiveArray

toPrimitiveArray

toPrimitiveArray

toObjectList

toObjectList

toObjectList

partition

partition

partition

partition

partition

partition

partition

partition

quickSelect

quickSelect

quickSelect

quickSelect

quickSelect

quickSelect

quickSelect

quickSelect

medianOfMedians

fromUpTo

fromUpTo

fromUpTo

radixSort

countingSort

quickSort

quickSort

quickSort

quickSort

quickSort

quickSort

quickSort

quickSort

multiQuickSort

multiQuickSort

multiQuickSort

multiQuickSort

deduplicate

deduplicate

union

intersection

intersectionUnsorted

missingNumber

min

minIndex

min

minIndex

min

minIndex

max

maxIndex

max

maxIndex

max

maxIndex

subArray