com.jn.langx.util.collection

类 Arrs

java.lang.Object

com.jn.langx.util.collection.Arrs

public class Arrs
extends Object

Array tools

构造器概要

构造器

构造器和说明
Arrs()

方法概要

限定符和类型	方法和说明
static <E> E[]	createArray(Class<E> componentType, int length) Create an array with the specified length
static <E> E[]	createArray(Class<E> componentType, int length, E initValue) Create an array with the specified length and every element's value is the specified initValue
static <E> E[]	createArray(Class<E> componentType, int length, Supplier<Integer,E> initSupplier) Create an array with the specified length and every element's value is supplied by the specified initSupplier
static boolean	deepEquals(Object[] a1, Object[] a2)
static boolean	deepEquals(Object e1, Object e2)
static int	getLength(Object object) get the length if argument is an array, else -1
static <E> void	initArray(E[] array, E initValue)
static <E> void	initArray(E[] array, Supplier<Integer,E> initSupplier)
static boolean	isArray(Object o) judge whether an object is an Array
static boolean	isNegativeIndex(int length, int index) 判断是否为负数索引
static boolean	isPositiveIndex(int length, int index) 判断是否为正数索引
static boolean	isValidIndex(int length, int index) 判断索引是否有效
static Integer[]	range(int end) It is similar to Python's range(start, end, step) [start, end)
static Integer[]	range(int start, int end) It is similar to Python's range(start, end, step) [start, end)
static Integer[]	range(int start, int end, int step) It is similar to Python's range(start, end, step) [start, end)
static int	reverseIndex(int length, int index) 反转索引
static <E> void	swap(E[] arr, int i, int j) Swaps the two specified elements in the specified array.
static <E> E[]	wrapAsArray(E o) Wrap any object using new Object[]{object};

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

Arrs

public Arrs()

方法详细资料

getLength

public static int getLength(Object object)

get the length if argument is an array, else -1

参数:

object - any object

返回:

the length if argument is an array, else -1

isArray

public static boolean isArray(@Nullable
                              Object o)

judge whether an object is an Array

wrapAsArray

public static <E> E[] wrapAsArray(@Nullable
                                  E o)

Wrap any object using new Object[]{object};

createArray

public static <E> E[] createArray(@Nullable
                                  Class<E> componentType,
                                  int length)

Create an array with the specified length

createArray

public static <E> E[] createArray(@Nullable
                                  Class<E> componentType,
                                  int length,
                                  @Nullable
                                  E initValue)

Create an array with the specified length and every element's value is the specified initValue

createArray

public static <E> E[] createArray(@Nullable
                                  Class<E> componentType,
                                  int length,
                                  @NonNull
                                  Supplier<Integer,E> initSupplier)

Create an array with the specified length and every element's value is supplied by the specified initSupplier

initArray

public static <E> void initArray(@NonNull
                                 E[] array,
                                 @Nullable
                                 E initValue)

initArray

public static <E> void initArray(@NonNull
                                 E[] array,
                                 @NonNull
                                 Supplier<Integer,E> initSupplier)

range

public static Integer[] range(int end)

It is similar to Python's range(start, end, step) [start, end)

另请参阅:

range(int, int, int)

range

public static Integer[] range(int start,
                              int end)

It is similar to Python's range(start, end, step) [start, end)

另请参阅:

range(int, int, int)

range

public static Integer[] range(int start,
                              int end,
                              int step)

It is similar to Python's range(start, end, step) [start, end)

deepEquals

public static boolean deepEquals(Object[] a1,
                                 Object[] a2)

deepEquals

public static boolean deepEquals(Object e1,
                                 Object e2)

swap

public static <E> void swap(@NonNull
                            E[] arr,
                            int i,
                            int j)

Swaps the two specified elements in the specified array.

reverseIndex

public static int reverseIndex(int length,
                               int index)

反转索引

isValidIndex

public static boolean isValidIndex(int length,
                                   int index)

判断索引是否有效

isPositiveIndex

public static boolean isPositiveIndex(int length,
                                      int index)

判断是否为正数索引

isNegativeIndex

public static boolean isNegativeIndex(int length,
                                      int index)

判断是否为负数索引