RenderingHints.Key (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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java.awt
Class RenderingHints.Key

java.lang.Object
  java.awt.RenderingHints.Key

Enclosing class:: RenderingHints

public abstract static class RenderingHints.Key
extends Object
extends Object

Defines the base type of all keys used along with the RenderingHints class to control various algorithm choices in the rendering and imaging pipelines. Instances of this class are immutable and unique which means that tests for matches can be made using the == operator instead of the more expensive equals() method.

Constructor Summary

protected RenderingHints.Key(int privatekey)
          Construct a key using the indicated private key.

Method Summary

boolean equals(Object o)
          The equals method for all Key objects will return the same result as the equality operator '=='.

int hashCode()
          The hash code for all Key objects will be the same as the system identity code of the object as defined by the System.identityHashCode() method.

protected int intKey()
          Returns the private integer key that the subclass instantiated this Key with.

abstract boolean isCompatibleValue(Object val)
          Returns true if the specified object is a valid value for this Key.

Methods inherited from class java.lang.Object

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

Constructor Summary
`protected`	`RenderingHints.Key(int privatekey)` Construct a key using the indicated private key.

Method Summary
`boolean`	`equals(Object o)` The equals method for all Key objects will return the same result as the equality operator '=='.
`int`	`hashCode()` The hash code for all Key objects will be the same as the system identity code of the object as defined by the System.identityHashCode() method.
`protected int`	`intKey()` Returns the private integer key that the subclass instantiated this Key with.
`abstract boolean`	`isCompatibleValue(Object val)` Returns true if the specified object is a valid value for this Key.

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

RenderingHints.Key

protected RenderingHints.Key(int privatekey)

Construct a key using the indicated private key. Each subclass of Key maintains its own unique domain of integer keys. No two objects with the same integer key and of the same specific subclass can be constructed. An exception will be thrown if an attempt is made to construct another object of a given class with the same integer key as a pre-existing instance of that subclass of Key.

Parameters:: privatekey - the specified key

Method Detail

isCompatibleValue

public abstract boolean isCompatibleValue(Object val)

Returns true if the specified object is a valid value for this Key.

Parameters:: val - the Object to test for validity
Returns:: true if val is valid; false otherwise.

intKey

protected final int intKey()

Returns the private integer key that the subclass instantiated this Key with.

Returns:: the private integer key that the subclass instantiated this Key with.

hashCode

public final int hashCode()

The hash code for all Key objects will be the same as the system identity code of the object as defined by the System.identityHashCode() method.

Overrides:: hashCode in class Object

Returns:: a hash code value for this object.
See Also:: Object.equals(java.lang.Object), Hashtable

equals

public final boolean equals(Object o)

The equals method for all Key objects will return the same result as the equality operator '=='.

Overrides:: equals in class Object

Parameters:: o - the reference object with which to compare.
Returns:: true if this object is the same as the obj argument; false otherwise.
See Also:: Object.hashCode(), Hashtable