TransformAttribute (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.font
Class TransformAttribute

java.lang.Object
  java.awt.font.TransformAttribute

All Implemented Interfaces:: Serializable

public final class TransformAttribute
extends Object
implements Serializable
extends Object
implements Serializable

The TransformAttribute class provides an immutable wrapper for a transform so that it is safe to use as an attribute.

See Also:: Serialized Form

Field Summary

static TransformAttribute IDENTITY
          A TransformAttribute representing the identity transform.

Constructor Summary

TransformAttribute(AffineTransform transform)
          Wraps the specified transform.

Method Summary

boolean equals(Object rhs)
          Returns true if rhs is a TransformAttribute whose transform is equal to this TransformAttribute's transform.

AffineTransform getTransform()
          Returns a copy of the wrapped transform.

int hashCode()
          Returns a hash code value for the object.

boolean isIdentity()
          Returns true if the wrapped transform is an identity transform.

Methods inherited from class java.lang.Object

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

Field Summary
`static TransformAttribute`	`IDENTITY` A `TransformAttribute` representing the identity transform.

Constructor Summary
`TransformAttribute(AffineTransform transform)` Wraps the specified transform.

Method Summary
`boolean`	`equals(Object rhs)` Returns `true` if rhs is a `TransformAttribute` whose transform is equal to this `TransformAttribute`'s transform.
`AffineTransform`	`getTransform()` Returns a copy of the wrapped transform.
`int`	`hashCode()` Returns a hash code value for the object.
`boolean`	`isIdentity()` Returns `true` if the wrapped transform is an identity transform.

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

Field Detail

IDENTITY

public static final TransformAttribute IDENTITY

A TransformAttribute representing the identity transform.

Since:: 1.6

Constructor Detail

TransformAttribute

public TransformAttribute(AffineTransform transform)

Wraps the specified transform. The transform is cloned and a reference to the clone is kept. The original transform is unchanged. If null is passed as the argument, this constructor behaves as though it were the identity transform. (Note that it is preferable to use IDENTITY in this case.)

Parameters:: transform - the specified AffineTransform to be wrapped, or null.

Method Detail

getTransform

public AffineTransform getTransform()

Returns a copy of the wrapped transform.

Returns:: a AffineTransform that is a copy of the wrapped transform of this TransformAttribute.

isIdentity

public boolean isIdentity()

Returns true if the wrapped transform is an identity transform.

Returns:: true if the wrapped transform is an identity transform; false otherwise.
Since:: 1.4

hashCode

public int hashCode()

Description copied from class: Object

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the Object.equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java^TM programming language.)

Overrides:: hashCode in class Object

Returns:: a hash code value for this object.
Since:: 1.6
See Also:: Object.equals(java.lang.Object), Hashtable

equals

public boolean equals(Object rhs)

Returns true if rhs is a TransformAttribute whose transform is equal to this TransformAttribute's transform.

Overrides:: equals in class Object

Parameters:: rhs - the object to compare to
Returns:: true if the argument is a TransformAttribute whose transform is equal to this TransformAttribute's transform.
Since:: 1.6
See Also:: Object.hashCode(), Hashtable