public abstract class UserDefinedColor extends Color
You can define your own color attributes but must implement the abstract methods defined by
UserDefinedColor.
| 构造器 | 说明 |
|---|---|
UserDefinedColor() |
Default constructor used to create a
UserDefinedColor instance. |
UserDefinedColor(UserDefinedColor color) |
A constructor that defines a color by replicating another
UserDefinedColor object. |
| 限定符和类型 | 方法 | 说明 |
|---|---|---|
UserDefinedColor |
assign(UserDefinedColor color) |
Assigns the values of another
UserDefinedColor object to the current object. |
boolean |
equals(Object color) |
Indicates whether some other object is "equal to" this one.
|
abstract void |
fromRgb(RgbColor color) |
Defines an abstract method to convert a
RgbColor object into a UserDefinedColor object. |
int |
hashCode() |
Returns a hash code value for the object.
|
abstract RgbColor |
toRgb() |
Defines an abstract method to convert a
UserDefinedColor object into a RgbColor object. |
public UserDefinedColor()
UserDefinedColor instance.public UserDefinedColor(UserDefinedColor color)
UserDefinedColor object.color - Indicates the other UserDefinedColor object to replicate.public boolean equals(Object color)
The equals method implements an equivalence relation
on non-null object references:
x, x.equals(x) should return
true.
x and y, x.equals(y)
should return true if and only if
y.equals(x) returns true.
x, y, and z, if
x.equals(y) returns true and
y.equals(z) returns true, then
x.equals(z) should return true.
x and y, multiple invocations of
x.equals(y) consistently return true
or consistently return false, provided no
information used in equals comparisons on the
objects is modified.
x,
x.equals(null) should return false.
The equals method for class Object implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x and
y, this method returns true if and only
if x and y refer to the same object
(x == y has the value true).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode method, which states
that equal objects must have equal hash codes.
equals 在类中 Colorcolor - the reference object with which to compare.true if this object is the same as the obj
argument; false otherwise.Object.hashCode(),
HashMappublic int hashCode()
HashMap.
The general contract of hashCode is:
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.
equals(Object)
method, then calling the hashCode method on each of
the two objects must produce the same integer result.
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 hash tables.
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™ programming language.)
hashCode 在类中 ColorObject.equals(java.lang.Object),
System.identityHashCode(java.lang.Object)public UserDefinedColor assign(UserDefinedColor color)
UserDefinedColor object to the current object.color - Indicates another UserDefinedColor object to assign values from.public abstract RgbColor toRgb()
UserDefinedColor object into a RgbColor object. The
specific implementation relies on child classes.RgbColor object.public abstract void fromRgb(RgbColor color)
RgbColor object into a UserDefinedColor object. The
specific implementation relies on child classes.color - Indicates the RgbColor object.