Modifier and Type	Class and Description
private abstract static class	Wrapper.Format
public static class	Wrapper.NumericClasses

Modifier and Type	Field and Description
private final ClassDesc	basicClassDesc
private final char	basicTypeChar
private final String	basicTypeString
public static final Wrapper	BOOLEAN
public static final Wrapper	BYTE
public static final Wrapper	CHAR
public static final int	COUNT
public static final Wrapper	DOUBLE
private static final Object	DOUBLE_ZERO
private final Object	emptyArray
public static final Wrapper	FLOAT
private static final Object	FLOAT_ZERO
private final int	format
private static final Wrapper[]	FROM_CHAR
public static final Wrapper	INT
public static final Wrapper	LONG
private final int	numericClass
public static final Wrapper	OBJECT
private final String	primitiveSimpleName
private final Class<?>	primitiveType
public static final Wrapper	SHORT
private final int	superClasses
public static final Wrapper	VOID
private final ClassDesc	wrapperClassDesc
private final String	wrapperSimpleName
private final Class<?>	wrapperType

Access	Constructor and Description
private	Wrapper(Class<?> wtype, String wtypeName, Class<?> ptype, String ptypeName, char tchar, Object emptyArray, int format, int numericClass, int superClasses, ClassDesc basicClassDesc, ClassDesc wrapperClassDesc)

Method Summary

Modifier and Type	Method and Description
public Class<?>	arrayType()
public static <T> Class<T>	asPrimitiveType(Class<T> type) If `type` is a wrapper type, return the corresponding primitive type, else return `type` unchanged.
public static <T> Class<T>	asWrapperType(Class<T> type) If `type` is a primitive type, return the corresponding wrapper type, else return `type` unchanged.
public ClassDesc	basicClassDescriptor() A nominal descriptor of the wrapped type
public static char	basicTypeChar(Class<?> type) What is the bytecode signature character for this type?
public char	basicTypeChar() What is the bytecode signature character for this wrapper's primitive type?
private static RuntimeException	basicTypeError(char type)
public String	basicTypeString() What is the bytecode signature string for this wrapper's primitive type?
public int	bitWidth() How many bits are in the wrapped value?
private static boolean	boolValue(byte bits)
public <T> T	cast(Object x, Class<T> type) Cast a wrapped value to the given type, which may be either a primitive or wrapper type.
private static boolean	checkConvertibleFrom()
public <T> T	convert(Object x, Class<T> type) Convert a wrapped value to the given type.
private <T> T	convert(Object x, Class<T> type, boolean isCast)
public void	copyArrayBoxing(Object a, int apos, Object[] values, int vpos, int length)
public void	copyArrayUnboxing(Object[] values, int vpos, Object a, int apos, int length)
public String	detailString() For debugging, give the details of this wrapper.
pack-priv static Wrapper	findWrapperType(Class<?> type)
public static Wrapper	forBasicType(char type) Return the wrapper that corresponds to the given bytecode signature character.
public static Wrapper	forBasicType(Class<?> type) Return the wrapper for the given type, if it is a primitive type, else return `OBJECT`.
pack-priv static <T> Class<T>	forceType(Class<?> type, Class<T> exampleType) Cast a reference type to another reference type.
public static Wrapper	forPrimitiveType(Class<?> type) Return the wrapper that wraps values of the given type.
public static Wrapper	forWrapperType(Class<?> type) Return the wrapper that wraps values into the given wrapper type.
public boolean	isConvertibleFrom(Wrapper source) Does the JLS 5.1.2 allow a variable of this wrapper's primitive type to be assigned from a value of the given wrapper's primitive type?
public boolean	isDoubleWord() Does the wrapped value occupy two JVM stack slots?
public boolean	isFloating() Is the wrapped type either float or double?
public boolean	isIntegral() Is the wrapped type a primitive other than float, double, or void?
public boolean	isNumeric() Is the wrapped type numeric (not void or object)?
public boolean	isOther() Is the wrapped type either void or a reference?
public static boolean	isPrimitiveType(Class<?> type) Query: Is the given type a primitive, such as `int` or `void`?
public boolean	isSigned()
public boolean	isSingleWord() Does the wrapped value occupy a single JVM stack slot?
public boolean	isStrictSubRangeOf(Wrapper target)
public boolean	isSubwordOrInt() Is the wrapped type one of int, boolean, byte, char, or short?
public boolean	isUnsigned()
public static boolean	isWrapperNumericOrBooleanType(Class<?> type) Query: Is the given type a wrapper, such as `Integer`, `Byte`, etc excluding `Void` and `Object`?
public static boolean	isWrapperType(Class<?> type) Query: Is the given type a wrapper, such as `Integer` or `Void`?
public Object	makeArray(int len)
private static ClassCastException	newClassCastException(Class<?> actual, Class<?> expected)
private static RuntimeException	newIllegalArgumentException(String message, Object x)
private static RuntimeException	newIllegalArgumentException(String message)
private static Number	numberValue(Object x)
public String	primitiveSimpleName() What is the simple name of the primitive type?
public Class<?>	primitiveType() What is the primitive type wrapped by this wrapper?
public int	stackSlots() How many JVM stack slots occupied by the wrapped value?
public static Wrapper	valueOf(String name)
public static Wrapper[]	values()
public Object	wrap(Object x) Wrap a value in this wrapper's type.
public Object	wrap(int x) Wrap a value (an int or smaller value) in this wrapper's type.
public ClassDesc	wrapperClassDescriptor() A nominal descriptor of the wrapper type
public String	wrapperSimpleName() What is the simple name of the wrapper type?
public Class<?>	wrapperType() What is the wrapper type for this wrapper?
public <T> Class<T>	wrapperType(Class<T> exampleType) What is the wrapper type for this wrapper?
private static RuntimeException	wrapperTypeError(Class<?> type)
public Object	zero() Produce a zero value for the given wrapper type.
public <T> T	zero(Class<T> type) Produce a zero value for the given wrapper type T.

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

basicClassDesc	back to summary
private final ClassDesc basicClassDesc

basicTypeChar	back to summary
private final char basicTypeChar

basicTypeString	back to summary
private final String basicTypeString

BOOLEAN	back to summary
public static final Wrapper BOOLEAN

BYTE	back to summary
public static final Wrapper BYTE

CHAR	back to summary
public static final Wrapper CHAR

COUNT	back to summary
public static final int COUNT

DOUBLE	back to summary
public static final Wrapper DOUBLE

DOUBLE_ZERO	back to summary
private static final Object DOUBLE_ZERO

emptyArray	back to summary
private final Object emptyArray

FLOAT	back to summary
public static final Wrapper FLOAT

FLOAT_ZERO	back to summary
private static final Object FLOAT_ZERO

format	back to summary
private final int format

FROM_CHAR	back to summary
private static final Wrapper[] FROM_CHAR

INT	back to summary
public static final Wrapper INT

LONG	back to summary
public static final Wrapper LONG

numericClass	back to summary
private final int numericClass

OBJECT	back to summary
public static final Wrapper OBJECT

primitiveSimpleName	back to summary
private final String primitiveSimpleName

primitiveType	back to summary
private final Class<?> primitiveType

SHORT	back to summary
public static final Wrapper SHORT

superClasses	back to summary
private final int superClasses

VOID	back to summary
public static final Wrapper VOID

wrapperClassDesc	back to summary
private final ClassDesc wrapperClassDesc

wrapperSimpleName	back to summary
private final String wrapperSimpleName

wrapperType	back to summary
private final Class<?> wrapperType

Constructor Detail

Wrapper	back to summary
private Wrapper(Class<?> wtype, String wtypeName, Class<?> ptype, String ptypeName, char tchar, Object emptyArray, int format, int numericClass, int superClasses, ClassDesc basicClassDesc, ClassDesc wrapperClassDesc)

Wrapper

back to summary

private Wrapper(Class<?> wtype, String wtypeName, Class<?> ptype, String ptypeName, char tchar, Object emptyArray, int format, int numericClass, int superClasses, ClassDesc basicClassDesc, ClassDesc wrapperClassDesc)

Method Detail

arrayType	back to summary
public Class<?> arrayType()

asPrimitiveType	back to summary
public static <T> Class<T> asPrimitiveType(Class<T> type) If `type` is a wrapper type, return the corresponding primitive type, else return `type` unchanged.

asWrapperType	back to summary
public static <T> Class<T> asWrapperType(Class<T> type) If `type` is a primitive type, return the corresponding wrapper type, else return `type` unchanged.

basicClassDescriptor	back to summary
public ClassDesc basicClassDescriptor() A nominal descriptor of the wrapped type

basicTypeChar	back to summary
public static char basicTypeChar(Class<?> type) What is the bytecode signature character for this type? All non-primitives, including array types, report as 'L', the signature character for references.

basicTypeChar	back to summary
public char basicTypeChar() What is the bytecode signature character for this wrapper's primitive type?

basicTypeError	back to summary
private static RuntimeException basicTypeError(char type) Annotations @DontInline

basicTypeString	back to summary
public String basicTypeString() What is the bytecode signature string for this wrapper's primitive type?

bitWidth	back to summary
public int bitWidth() How many bits are in the wrapped value? Returns 0 for OBJECT or VOID.

boolValue	back to summary
private static boolean boolValue(byte bits)

cast back to summary

cast	back to summary
public <T> T cast(Object x, Class<T> type) Cast a wrapped value to the given type, which may be either a primitive or wrapper type. The given target type must be this wrapper's primitive or wrapper type. If this wrapper is OBJECT, the target type may also be an interface, perform no runtime check. Performs standard primitive conversions, including truncation and float conversions. The given type must be compatible with this wrapper. That is, it must either be the wrapper type (or a subtype, in the case of `OBJECT`) or else it must be the wrapper's primitive type. Primitive conversions are only performed if the given type is itself a primitive. Exceptions ClassCastException: if the given type is not compatible with this wrapper

public <T> T cast(Object x, Class<T> type)

Cast a wrapped value to the given type, which may be either a primitive or wrapper type. The given target type must be this wrapper's primitive or wrapper type. If this wrapper is OBJECT, the target type may also be an interface, perform no runtime check. Performs standard primitive conversions, including truncation and float conversions. The given type must be compatible with this wrapper. That is, it must either be the wrapper type (or a subtype, in the case of OBJECT) or else it must be the wrapper's primitive type. Primitive conversions are only performed if the given type is itself a primitive.

Exceptions

ClassCastException:: if the given type is not compatible with this wrapper

checkConvertibleFrom	back to summary
private static boolean checkConvertibleFrom()

convert	back to summary
public <T> T convert(Object x, Class<T> type) Convert a wrapped value to the given type. The given target type must be this wrapper's primitive or wrapper type. This is equivalent to `cast`, except that it refuses to perform narrowing primitive conversions.

convert	back to summary
private <T> T convert(Object x, Class<T> type, boolean isCast)

copyArrayBoxing	back to summary
public void copyArrayBoxing(Object a, int apos, Object[] values, int vpos, int length)

copyArrayUnboxing	back to summary
public void copyArrayUnboxing(Object[] values, int vpos, Object a, int apos, int length)

detailString	back to summary
public String detailString() For debugging, give the details of this wrapper.

findWrapperType	back to summary
pack-priv static Wrapper findWrapperType(Class<?> type)

forBasicType back to summary

forBasicType	back to summary
public static Wrapper forBasicType(char type) Return the wrapper that corresponds to the given bytecode signature character. Return `OBJECT` for the character 'L'. Exceptions IllegalArgumentException: for any non-signature character or `'['`.

public static Wrapper forBasicType(char type)

Return the wrapper that corresponds to the given bytecode signature character. Return OBJECT for the character 'L'.

Exceptions

IllegalArgumentException:: for any non-signature character or '['.

forBasicType	back to summary
public static Wrapper forBasicType(Class<?> type) Return the wrapper for the given type, if it is a primitive type, else return `OBJECT`.

forceType	back to summary
pack-priv static <T> Class<T> forceType(Class<?> type, Class<T> exampleType) Cast a reference type to another reference type. If the target type is an interface, perform no runtime check. (This loophole is safe, and is allowed by the JVM verifier.) If the target type is a primitive, change it to a wrapper.

forPrimitiveType back to summary

public static Wrapper forPrimitiveType(Class<?> type)

Return the wrapper that wraps values of the given type. The type may be Object, meaning the OBJECT wrapper. Otherwise, the type must be a primitive.

Exceptions

IllegalArgumentException:: for unexpected types

forWrapperType back to summary

public static Wrapper forWrapperType(Class<?> type)

Return the wrapper that wraps values into the given wrapper type. If it is Object, return OBJECT. Otherwise, it must be a wrapper type. The type must not be a primitive type.

Exceptions

IllegalArgumentException:: for unexpected types

isConvertibleFrom back to summary

public boolean isConvertibleFrom(Wrapper source)

Does the JLS 5.1.2 allow a variable of this wrapper's primitive type to be assigned from a value of the given wrapper's primitive type? Cases:

unboxing followed by widening primitive conversion
any type converted to void (i.e., dropping a method call's value)
boxing conversion followed by widening reference conversion to Object

These are the cases allowed by MethodHandle.asType.

isDoubleWord	back to summary
public boolean isDoubleWord() Does the wrapped value occupy two JVM stack slots?

isFloating	back to summary
public boolean isFloating() Is the wrapped type either float or double?

isIntegral	back to summary
public boolean isIntegral() Is the wrapped type a primitive other than float, double, or void?

isNumeric	back to summary
public boolean isNumeric() Is the wrapped type numeric (not void or object)?

isOther	back to summary
public boolean isOther() Is the wrapped type either void or a reference?

isPrimitiveType	back to summary
public static boolean isPrimitiveType(Class<?> type) Query: Is the given type a primitive, such as `int` or `void`?

isSigned	back to summary
public boolean isSigned()

isSingleWord	back to summary
public boolean isSingleWord() Does the wrapped value occupy a single JVM stack slot?

isStrictSubRangeOf	back to summary
public boolean isStrictSubRangeOf(Wrapper target)

isSubwordOrInt	back to summary
public boolean isSubwordOrInt() Is the wrapped type one of int, boolean, byte, char, or short?

isUnsigned	back to summary
public boolean isUnsigned()

isWrapperNumericOrBooleanType	back to summary
public static boolean isWrapperNumericOrBooleanType(Class<?> type) Query: Is the given type a wrapper, such as `Integer`, `Byte`, etc excluding `Void` and `Object`?

isWrapperType	back to summary
public static boolean isWrapperType(Class<?> type) Query: Is the given type a wrapper, such as `Integer` or `Void`?

makeArray	back to summary
public Object makeArray(int len)

newClassCastException	back to summary
private static ClassCastException newClassCastException(Class<?> actual, Class<?> expected)

newIllegalArgumentException	back to summary
private static RuntimeException newIllegalArgumentException(String message, Object x)

newIllegalArgumentException	back to summary
private static RuntimeException newIllegalArgumentException(String message)

numberValue	back to summary
private static Number numberValue(Object x)

primitiveSimpleName	back to summary
public String primitiveSimpleName() What is the simple name of the primitive type?

primitiveType	back to summary
public Class<?> primitiveType() What is the primitive type wrapped by this wrapper?

stackSlots	back to summary
public int stackSlots() How many JVM stack slots occupied by the wrapped value? Returns 0 for VOID.

valueOf	back to summary
public static Wrapper valueOf(String name)

values	back to summary
public static Wrapper[] values()

wrap back to summary

public Object wrap(Object x)

Wrap a value in this wrapper's type. Performs standard primitive conversions, including truncation and float conversions. Performs returns the unchanged reference for OBJECT. Returns null for VOID. Returns a zero value for a null input.

Exceptions

ClassCastException:: if this wrapper is numeric and the operand is not a number, character, boolean, or null

wrap	back to summary
public Object wrap(int x) Wrap a value (an int or smaller value) in this wrapper's type. Performs standard primitive conversions, including truncation and float conversions. Produces an `Integer` for `OBJECT`, although the exact type of the operand is not known. Returns null for `VOID`.

wrapperClassDescriptor	back to summary
public ClassDesc wrapperClassDescriptor() A nominal descriptor of the wrapper type

wrapperSimpleName	back to summary
public String wrapperSimpleName() What is the simple name of the wrapper type?

wrapperType	back to summary
public Class<?> wrapperType() What is the wrapper type for this wrapper?

wrapperType	back to summary
public <T> Class<T> wrapperType(Class<T> exampleType) What is the wrapper type for this wrapper? Otherwise, the example type must be the wrapper type, or the corresponding primitive type. (For `OBJECT`, the example type can be any non-primitive, and is normalized to `Object.class`.) The resulting class type has the same type parameter.

wrapperTypeError	back to summary
private static RuntimeException wrapperTypeError(Class<?> type) Annotations @DontInline

zero	back to summary
public Object zero() Produce a zero value for the given wrapper type. This will be a numeric zero for a number or character, false for a boolean, and null for a reference or void. The common thread is that this is what is contained in a default-initialized variable of the given primitive type. (For void, it is what a reflective method returns instead of no value at all.)

zero	back to summary
public <T> T zero(Class<T> type) Produce a zero value for the given wrapper type T. The optional argument must a type compatible with this wrapper. Equivalent to `this.cast(this.zero(), type)`.

sun.invoke.util back to summary

private abstract Class Wrapper.Format

Class Inheritance

extends Object

java.lang.Object
sun.invoke.util.Wrapper.Format

Field Summary

Modifier and Type	Field and Description
pack-priv static final int	BOOLEAN
pack-priv static final int	CHAR
pack-priv static final int	FLOAT
pack-priv static final int	FLOATING
pack-priv static final int	INT
pack-priv static final int	KIND_SHIFT
pack-priv static final int	NUM_MASK
pack-priv static final int	SHORT
pack-priv static final int	SIGNED
pack-priv static final int	SIZE_MASK
pack-priv static final int	SIZE_SHIFT
pack-priv static final int	SLOT_MASK
pack-priv static final int	SLOT_SHIFT
pack-priv static final int	UNSIGNED
pack-priv static final int	VOID

Constructor Summary

Access	Constructor and Description
private	Format()

Method Summary

Modifier and Type	Method and Description
pack-priv static int	floating(int size)
pack-priv static int	format(int kind, int size, int slots)
pack-priv static int	other(int slots)
pack-priv static int	signed(int size)
pack-priv static int	unsigned(int size)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

BOOLEAN	back to summary
pack-priv static final int BOOLEAN

CHAR	back to summary
pack-priv static final int CHAR

FLOAT	back to summary
pack-priv static final int FLOAT

FLOATING	back to summary
pack-priv static final int FLOATING

INT	back to summary
pack-priv static final int INT

KIND_SHIFT	back to summary
pack-priv static final int KIND_SHIFT

NUM_MASK	back to summary
pack-priv static final int NUM_MASK

SHORT	back to summary
pack-priv static final int SHORT

SIGNED	back to summary
pack-priv static final int SIGNED

SIZE_MASK	back to summary
pack-priv static final int SIZE_MASK

SIZE_SHIFT	back to summary
pack-priv static final int SIZE_SHIFT

SLOT_MASK	back to summary
pack-priv static final int SLOT_MASK

SLOT_SHIFT	back to summary
pack-priv static final int SLOT_SHIFT

UNSIGNED	back to summary
pack-priv static final int UNSIGNED

VOID	back to summary
pack-priv static final int VOID

Constructor Detail

Format	back to summary
private Format()

Method Detail

floating	back to summary
pack-priv static int floating(int size)

format	back to summary
pack-priv static int format(int kind, int size, int slots)

other	back to summary
pack-priv static int other(int slots)

signed	back to summary
pack-priv static int signed(int size)

unsigned	back to summary
pack-priv static int unsigned(int size)

public final Enum Wrapper

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private abstract Class Wrapper.Format

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Class Wrapper.NumericClasses

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Modifier and Type	Field and Description
public static final int	BYTE_CLASS
pack-priv static final int	BYTE_SUPERCLASSES
public static final int	CHAR_CLASS
pack-priv static final int	CHAR_SUPERCLASSES
public static final int	DOUBLE_CLASS
public static final int	FLOAT_CLASS
pack-priv static final int	FLOAT_SUPERCLASSES
public static final int	INT_CLASS
pack-priv static final int	INT_SUPERCLASSES
public static final int	LONG_CLASS
pack-priv static final int	LONG_SUPERCLASSES
public static final int	SHORT_CLASS
pack-priv static final int	SHORT_SUPERCLASSES