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java.awt
Class RenderingHints

java.lang.Object
  |
  +--java.awt.RenderingHints

public class RenderingHints

extends Object

implements Map, Cloneable

The RenderingHints class contains rendering hints that can be used by the Graphics2D class, and classes that implement BufferedImageOp and Raster.

Inner Class Summary

static class

RenderingHints.Key Defines the base type of all keys used to control various aspects of the rendering and imaging pipelines.

Inner classes inherited from class java.util.Map

Map.Entry

Field Summary

static RenderingHints.Key	KEY_ALPHA_INTERPOLATION Alpha interpolation hint key
static RenderingHints.Key	KEY_ANTIALIASING Antialiasing hint key
static RenderingHints.Key	KEY_COLOR_RENDERING Color rendering hint key
static RenderingHints.Key	KEY_DITHERING Dithering hint key
static RenderingHints.Key	KEY_FRACTIONALMETRICS Font fractional metrics hint key
static RenderingHints.Key	KEY_INTERPOLATION Interpolation hint key
static RenderingHints.Key	KEY_RENDERING Rendering hint key
static RenderingHints.Key	KEY_TEXT_ANTIALIASING Text antialiasing hint key
static Object	VALUE_ALPHA_INTERPOLATION_DEFAULT Alpha interpolation hint value -- ALPHA_INTERPOLATION_DEFAULT
static Object	VALUE_ALPHA_INTERPOLATION_QUALITY Alpha interpolation hint value -- ALPHA_INTERPOLATION_QUALITY
static Object	VALUE_ALPHA_INTERPOLATION_SPEED Alpha interpolation hint value -- ALPHA_INTERPOLATION_SPEED
static Object	VALUE_ANTIALIAS_DEFAULT Antialiasing hint values -- rendering is done with the platform default antialiasing mode.
static Object	VALUE_ANTIALIAS_OFF Antialiasing hint values -- rendering is done without antialiasing
static Object	VALUE_ANTIALIAS_ON Antialiasing hint values -- rendering is done with antialiasing
static Object	VALUE_COLOR_RENDER_DEFAULT Color rendering hint value -- COLOR_RENDER_DEFAULT
static Object	VALUE_COLOR_RENDER_QUALITY Color rendering hint value -- COLOR_RENDER_QUALITY
static Object	VALUE_COLOR_RENDER_SPEED Color rendering hint value -- COLOR_RENDER_SPEED
static Object	VALUE_DITHER_DEFAULT Dithering hint values -- use the platform default for dithering
static Object	VALUE_DITHER_DISABLE Dithering hint values -- do not dither when rendering
static Object	VALUE_DITHER_ENABLE Dithering hint values -- dither when rendering, if needed
static Object	VALUE_FRACTIONALMETRICS_DEFAULT Font fractional metrics hint values -- use the platform default for fractional metrics
static Object	VALUE_FRACTIONALMETRICS_OFF Font fractional metrics hint values -- fractional metrics disabled
static Object	VALUE_FRACTIONALMETRICS_ON Font fractional metrics hint values -- fractional metrics enabled
static Object	VALUE_INTERPOLATION_BICUBIC Interpolation hint value -- INTERPOLATION_BICUBIC
static Object	VALUE_INTERPOLATION_BILINEAR Interpolation hint value -- INTERPOLATION_BILINEAR
static Object	VALUE_INTERPOLATION_NEAREST_NEIGHBOR Interpolation hint value -- INTERPOLATION_NEAREST_NEIGHBOR
static Object	VALUE_RENDER_DEFAULT Rendering hint values -- The platform default rendering algorithms are chosen.
static Object	VALUE_RENDER_QUALITY Rendering hint values -- Appropriate rendering algorithms are chosen with a preference for output quality.
static Object	VALUE_RENDER_SPEED Rendering hint values -- Appropriate rendering algorithms are chosen with a preference for output speed.
static Object	VALUE_TEXT_ANTIALIAS_DEFAULT Text antialiasing hint value -- text rendering is done using the platform default text antialiasing mode.
static Object	VALUE_TEXT_ANTIALIAS_OFF Text antialiasing hint value -- text rendering is done without antialiasing
static Object	VALUE_TEXT_ANTIALIAS_ON Text antialiasing hint value -- text rendering is done with antialiasing

Constructor Summary

RenderingHints(Map init)
Constructs a new object with keys and values initialized from the specified Map object (which may be null).

RenderingHints(RenderingHints.Key key, Object value)
Constructs a new object with the specified key/value pair.

Method Summary

void	add(RenderingHints hints) Adds all of the keys and corresponding values from the specified RenderingHints object to this RenderingHints object.
void	clear() Clears this RenderingHints object of all key/value pairs.
Object	clone() Creates a clone of this RenderingHints object that has the same contents as this RenderingHints object.
boolean	containsKey(Object key) Returns true if this RenderingHints contains a mapping for the specified key.
boolean	containsValue(Object value) Returns true if this RenderingHints maps one or more keys to the specified value.
Set	entrySet() Returns a Set view of the mappings contained in this RenderingHints.
boolean	equals(Object o) Compares the specified Object with this RenderingHints for equality.
Object	get(Object key) Returns the value to which the specified key is mapped.
int	hashCode() Returns the hash code value for this RenderingHints.
boolean	isEmpty() Returns true if this RenderingHints contains no key-value mappings.
Set	keySet() Returns a Set view of the Keys contained in this RenderingHints.
Object	put(Object key, Object value) Maps the specified key to the specified value in this RenderingHints object.
void	putAll(Map m) Copies all of the mappings from the specified Map to this RenderingHints.
Object	remove(Object key) Removes the key and its corresponding value from this RenderingHints object.
int	size() Returns the number of key-value mappings in this RenderingHints.
String	toString() Returns a rather long string representation of the hashmap which contains the mappings of keys to values for this RenderingHints object.
Collection	values() Returns a Collection view of the values contained in this RenderinHints.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

KEY_ANTIALIASING

public static final RenderingHints.Key KEY_ANTIALIASING

Antialiasing hint key

VALUE_ANTIALIAS_ON

public static final Object VALUE_ANTIALIAS_ON

Antialiasing hint values -- rendering is done with antialiasing

VALUE_ANTIALIAS_OFF

public static final Object VALUE_ANTIALIAS_OFF

Antialiasing hint values -- rendering is done without antialiasing

VALUE_ANTIALIAS_DEFAULT

public static final Object VALUE_ANTIALIAS_DEFAULT

Antialiasing hint values -- rendering is done with the platform default antialiasing mode.

KEY_RENDERING

public static final RenderingHints.Key KEY_RENDERING

Rendering hint key

VALUE_RENDER_SPEED

public static final Object VALUE_RENDER_SPEED

Rendering hint values -- Appropriate rendering algorithms are chosen with a preference for output speed.

VALUE_RENDER_QUALITY

public static final Object VALUE_RENDER_QUALITY

Rendering hint values -- Appropriate rendering algorithms are chosen with a preference for output quality.

VALUE_RENDER_DEFAULT

public static final Object VALUE_RENDER_DEFAULT

Rendering hint values -- The platform default rendering algorithms are chosen.

KEY_DITHERING

public static final RenderingHints.Key KEY_DITHERING

Dithering hint key

VALUE_DITHER_DISABLE

public static final Object VALUE_DITHER_DISABLE

Dithering hint values -- do not dither when rendering

VALUE_DITHER_ENABLE

public static final Object VALUE_DITHER_ENABLE

Dithering hint values -- dither when rendering, if needed

VALUE_DITHER_DEFAULT

public static final Object VALUE_DITHER_DEFAULT

Dithering hint values -- use the platform default for dithering

KEY_TEXT_ANTIALIASING

public static final RenderingHints.Key KEY_TEXT_ANTIALIASING

Text antialiasing hint key

VALUE_TEXT_ANTIALIAS_ON

public static final Object VALUE_TEXT_ANTIALIAS_ON

Text antialiasing hint value -- text rendering is done with antialiasing

VALUE_TEXT_ANTIALIAS_OFF

public static final Object VALUE_TEXT_ANTIALIAS_OFF

Text antialiasing hint value -- text rendering is done without antialiasing

VALUE_TEXT_ANTIALIAS_DEFAULT

public static final Object VALUE_TEXT_ANTIALIAS_DEFAULT

Text antialiasing hint value -- text rendering is done using the platform default text antialiasing mode.

KEY_FRACTIONALMETRICS

public static final RenderingHints.Key KEY_FRACTIONALMETRICS

Font fractional metrics hint key

VALUE_FRACTIONALMETRICS_OFF

public static final Object VALUE_FRACTIONALMETRICS_OFF

Font fractional metrics hint values -- fractional metrics disabled

VALUE_FRACTIONALMETRICS_ON

public static final Object VALUE_FRACTIONALMETRICS_ON

Font fractional metrics hint values -- fractional metrics enabled

VALUE_FRACTIONALMETRICS_DEFAULT

public static final Object VALUE_FRACTIONALMETRICS_DEFAULT

Font fractional metrics hint values -- use the platform default for fractional metrics

KEY_INTERPOLATION

public static final RenderingHints.Key KEY_INTERPOLATION

Interpolation hint key

VALUE_INTERPOLATION_NEAREST_NEIGHBOR

public static final Object VALUE_INTERPOLATION_NEAREST_NEIGHBOR

Interpolation hint value -- INTERPOLATION_NEAREST_NEIGHBOR

VALUE_INTERPOLATION_BILINEAR

public static final Object VALUE_INTERPOLATION_BILINEAR

Interpolation hint value -- INTERPOLATION_BILINEAR

VALUE_INTERPOLATION_BICUBIC

public static final Object VALUE_INTERPOLATION_BICUBIC

Interpolation hint value -- INTERPOLATION_BICUBIC

KEY_ALPHA_INTERPOLATION

public static final RenderingHints.Key KEY_ALPHA_INTERPOLATION

Alpha interpolation hint key

VALUE_ALPHA_INTERPOLATION_SPEED

public static final Object VALUE_ALPHA_INTERPOLATION_SPEED

Alpha interpolation hint value -- ALPHA_INTERPOLATION_SPEED

VALUE_ALPHA_INTERPOLATION_QUALITY

public static final Object VALUE_ALPHA_INTERPOLATION_QUALITY

Alpha interpolation hint value -- ALPHA_INTERPOLATION_QUALITY

VALUE_ALPHA_INTERPOLATION_DEFAULT

public static final Object VALUE_ALPHA_INTERPOLATION_DEFAULT

Alpha interpolation hint value -- ALPHA_INTERPOLATION_DEFAULT

KEY_COLOR_RENDERING

public static final RenderingHints.Key KEY_COLOR_RENDERING

Color rendering hint key

VALUE_COLOR_RENDER_SPEED

public static final Object VALUE_COLOR_RENDER_SPEED

Color rendering hint value -- COLOR_RENDER_SPEED

VALUE_COLOR_RENDER_QUALITY

public static final Object VALUE_COLOR_RENDER_QUALITY

Color rendering hint value -- COLOR_RENDER_QUALITY

VALUE_COLOR_RENDER_DEFAULT

public static final Object VALUE_COLOR_RENDER_DEFAULT

Color rendering hint value -- COLOR_RENDER_DEFAULT

Constructor Detail

RenderingHints

public RenderingHints(Map init)

Constructs a new object with keys and values initialized from the specified Map object (which may be null).

Parameters:

init - a map of key/value pairs to initialize the hints or null if the object should be empty

RenderingHints

public RenderingHints(RenderingHints.Key key,
                      Object value)

Constructs a new object with the specified key/value pair.

Parameters:

key - the key of the particular hint property

value - the value of the hint property specified with key

Method Detail

size

public int size()

Returns the number of key-value mappings in this RenderingHints.

Specified by:

size in interface Map

Returns:

the number of key-value mappings in this RenderingHints.

isEmpty

public boolean isEmpty()

Returns true if this RenderingHints contains no key-value mappings.

Specified by:

isEmpty in interface Map

Returns:

true if this RenderingHints contains no key-value mappings.

containsKey

public boolean containsKey(Object key)

Returns true if this RenderingHints contains a mapping for the specified key.

Specified by:

containsKey in interface Map

Parameters:

key - key whose presence in this RenderingHints is to be tested.

Returns:

true if this RenderingHints contains a mapping for the specified key.

Throws:

ClassCastException - key is not of type RenderingHints.Key

NullPointerException - key is null

containsValue

public boolean containsValue(Object value)

Returns true if this RenderingHints maps one or more keys to the specified value. More formally, returns true if and only if this RenderingHints contains at least one mapping to a value v such that

 (value==null ? v==null : value.equals(v))
 

. This operation will probably require time linear in the RenderingHints size for most implementations of RenderingHints.

Specified by:

containsValue in interface Map

Parameters:

value - value whose presence in this RenderingHints is to be tested.

Returns:

true if this RenderingHints maps one or more keys to the specified value.

get

public Object get(Object key)

Returns the value to which the specified key is mapped.

Specified by:

get in interface Map

Parameters:

key - a rendering hint key

Returns:

the value to which the key is mapped in this object or null if the key is not mapped to any value in this object.

Throws:

ClassCastException - key is not of type RenderingHints.Key.

See Also:

put(Object, Object)

put

public Object put(Object key,
                  Object value)

Maps the specified key to the specified value in this RenderingHints object. Neither the key nor the value can be null. The value can be retrieved by calling the get method with a key that is equal to the original key.

Specified by:

put in interface Map

Parameters:

key - the rendering hint key.

value - the rendering hint value.

Returns:

the previous value of the specified key in this object or null if it did not have one.

Throws:

NullPointerException - if the key or value is null.

ClassCastException - key is not of type RenderingHints.Key.

IllegalArgumentException - value is not appropriate for the specified key.

See Also:

get(Object)

add

public void add(RenderingHints hints)

Adds all of the keys and corresponding values from the specified RenderingHints object to this RenderingHints object. Keys that are present in this RenderingHints object, but not in the specified RenderingHints object are not affected.

Parameters:

hints - the set of key/value pairs to be added to this RenderingHints object

clear

public void clear()

Clears this RenderingHints object of all key/value pairs.

Specified by:

clear in interface Map

Tags copied from interface: Map

Throws:

UnsupportedOperationException - clear is not supported by this map.

remove

public Object remove(Object key)

Removes the key and its corresponding value from this RenderingHints object. This method does nothing if the key is not in this RenderingHints object.

Specified by:

remove in interface Map

Parameters:

key - the rendering hints key that needs to be removed

Returns:

the value to which the key had previously been mapped in this RenderingHints object, or null if the key did not have a mapping.

Throws:

ClassCastException - key is not of type RenderingHints.Key.

putAll

public void putAll(Map m)

Copies all of the mappings from the specified Map to this RenderingHints. These mappings replace any mappings that this RenderingHints had for any of the keys currently in the specified Map.

Specified by:

putAll in interface Map

Parameters:

t - mappings to be stored in this RenderingHints.

Throws:

ClassCastException - class of a key or value in the specified Map prevents it from being stored in this RenderingHints.

IllegalArgumentException - some aspect of a key or value in the specified Map prevents it from being stored in this RenderingHints.

keySet

public Set keySet()

Returns a Set view of the Keys contained in this RenderingHints. The Set is backed by the RenderingHints, so changes to the RenderingHints are reflected in the Set, and vice-versa. If the RenderingHints is modified while an iteration over the Set is in progress, the results of the iteration are undefined. The Set supports element removal, which removes the corresponding mapping from the RenderingHints, via the Iterator.remove, Set.remove, removeAll retainAll, and clear operations. It does not support the add or addAll operations.

Specified by:

keySet in interface Map

Returns:

a Set view of the keys contained in this RenderingHints.

values

public Collection values()

Returns a Collection view of the values contained in this RenderinHints. The Collection is backed by the RenderingHints, so changes to the RenderingHints are reflected in the Collection, and vice-versa. If the RenderingHints is modified while an iteration over the Collection is in progress, the results of the iteration are undefined. The Collection supports element removal, which removes the corresponding mapping from the RenderingHints, via the Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Specified by:

values in interface Map

Returns:

a Collection view of the values contained in this RenderingHints.

entrySet

public Set entrySet()

Returns a Set view of the mappings contained in this RenderingHints. Each element in the returned Set is a Map.Entry. The Set is backed by the RenderingHints, so changes to the RenderingHints are reflected in the Set, and vice-versa. If the RenderingHints is modified while while an iteration over the Set is in progress, the results of the iteration are undefined.

The entrySet returned from a RenderingHints object is not modifiable.

Specified by:

entrySet in interface Map

Returns:

a Set view of the mappings contained in this RenderingHints.

equals

public boolean equals(Object o)

Compares the specified Object with this RenderingHints for equality. Returns true if the specified object is also a Map and the two Map objects represent the same mappings. More formally, two Map objects t1 and t2 represent the same mappings if t1.keySet().equals(t2.keySet()) and for every key k in t1.keySet(),

 (t1.get(k)==null ? t2.get(k)==null : t1.get(k).equals(t2.get(k)))
 

. This ensures that the equals method works properly across different implementations of the Map interface.

Specified by:

equals in interface Map

Overrides:

equals in class Object

Parameters:

o - Object to be compared for equality with this RenderingHints.

Returns:

true if the specified Object is equal to this RenderingHints.

hashCode

public int hashCode()

Returns the hash code value for this RenderingHints. The hash code of a RenderingHints is defined to be the sum of the hashCodes of each Entry in the RenderingHints object's entrySet view. This ensures that t1.equals(t2) implies that t1.hashCode()==t2.hashCode() for any two Map objects t1 and t2, as required by the general contract of Object.hashCode.

Specified by:

hashCode in interface Map

Overrides:

hashCode in class Object

Returns:

the hash code value for this RenderingHints.

See Also:

Map.Entry.hashCode(), Object.hashCode(), Object.equals(Object), equals(Object)

clone

public Object clone()

Creates a clone of this RenderingHints object that has the same contents as this RenderingHints object.

Overrides:

clone in class Object

Returns:

a clone of this instance.

toString

public String toString()

Returns a rather long string representation of the hashmap which contains the mappings of keys to values for this RenderingHints object.

Overrides:

toString in class Object

Returns:

a string representation of this object.