com.google.common.primitives
Class Primitives

java.lang.Object
  extended by com.google.common.primitives.Primitives

public final class Primitives
extends Object

Contains static utility methods pertaining to primitive types and their corresponding wrapper types.

Since:
1.0
Author:
Kevin Bourrillion

Method Summary
static Set<Class<?>> allPrimitiveTypes()
          Returns an immutable set of all nine primitive types (including void).
static Set<Class<?>> allWrapperTypes()
          Returns an immutable set of all nine primitive-wrapper types (including Void).
static boolean isWrapperType(Class<?> type)
          Returns true if type is one of the nine primitive-wrapper types, such as Integer.
static
<T> Class<T>
unwrap(Class<T> type)
          Returns the corresponding primitive type of type if it is a wrapper type; otherwise returns type itself.
static
<T> Class<T>
wrap(Class<T> type)
          Returns the corresponding wrapper type of type if it is a primitive type; otherwise returns type itself.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

allPrimitiveTypes

public static Set<Class<?>> allPrimitiveTypes()
Returns an immutable set of all nine primitive types (including void). Note that a simpler way to test whether a Class instance is a member of this set is to call Class.isPrimitive().

Since:
3.0

allWrapperTypes

public static Set<Class<?>> allWrapperTypes()
Returns an immutable set of all nine primitive-wrapper types (including Void).

Since:
3.0

isWrapperType

public static boolean isWrapperType(Class<?> type)
Returns true if type is one of the nine primitive-wrapper types, such as Integer.

See Also:
Class.isPrimitive()

wrap

public static <T> Class<T> wrap(Class<T> type)
Returns the corresponding wrapper type of type if it is a primitive type; otherwise returns type itself. Idempotent.
     wrap(int.class) == Integer.class
     wrap(Integer.class) == Integer.class
     wrap(String.class) == String.class
 


unwrap

public static <T> Class<T> unwrap(Class<T> type)
Returns the corresponding primitive type of type if it is a wrapper type; otherwise returns type itself. Idempotent.
     unwrap(Integer.class) == int.class
     unwrap(int.class) == int.class
     unwrap(String.class) == String.class
 



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