org.apache.hadoop.util

类 GenericsUtil

java.lang.Object

org.apache.hadoop.util.GenericsUtil

public class GenericsUtil
extends Object

Contains utility methods for dealing with Java Generics.

构造器概要

构造器

构造器和说明
GenericsUtil()

方法概要

方法

限定符和类型	方法和说明
static <T> Class<T>	getClass(T t) Returns the Class object (of type Class<T>) of the argument of type T.
static <T> T[]	toArray(Class<T> c, List<T> list) Converts the given List<T> to a an array of T[].
static <T> T[]	toArray(List<T> list) Converts the given List<T> to a an array of T[].

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

GenericsUtil

public GenericsUtil()

方法详细资料

getClass

public static <T> Class<T> getClass(T t)

Returns the Class object (of type Class<T>) of the argument of type T.

类型参数:

T - The type of the argument

参数:

t - the object to get it class

返回:

Class<T>

toArray

public static <T> T[] toArray(Class<T> c,
              List<T> list)

Converts the given List<T> to a an array of T[].

参数:

c - the Class object of the items in the list

list - the list to convert

toArray

public static <T> T[] toArray(List<T> list)

Converts the given List<T> to a an array of T[].

参数:

list - the list to convert

抛出:

ArrayIndexOutOfBoundsException - if the list is empty. Use toArray(Class, List) if the list may be empty.