Point
public
class
Point
extends Object
implements
Parcelable
java.lang.Object | |
↳ | android.graphics.Point |
Point holds two integer coordinates
Summary
Inherited constants |
---|
Fields | |
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public
static
final
Creator<Point> |
CREATOR
|
public
int |
x
|
public
int |
y
|
Public constructors | |
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Point()
|
|
Point(Point src)
|
|
Point(int x, int y)
|
Public methods | |
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int
|
describeContents()
Parcelable interface methods |
final
boolean
|
equals(int x, int y)
Returns true if the point's coordinates equal (x,y) |
boolean
|
equals(Object o)
Indicates whether some other object is "equal to" this one. |
int
|
hashCode()
Returns a hash code value for the object. |
final
void
|
negate()
Negate the point's coordinates |
final
void
|
offset(int dx, int dy)
Offset the point's coordinates by dx, dy |
void
|
readFromParcel(Parcel in)
Set the point's coordinates from the data stored in the specified parcel. |
void
|
set(int x, int y)
Set the point's x and y coordinates |
String
|
toString()
Returns a string representation of the object. |
void
|
writeToParcel(Parcel out, int flags)
Write this point to the specified parcel. |
Inherited methods | |
---|---|
Fields
Public constructors
Point
public Point (Point src)
Parameters | |
---|---|
src |
Point : This value cannot be null . |
Public methods
describeContents
public int describeContents ()
Parcelable interface methods
Returns | |
---|---|
int |
a bitmask indicating the set of special object types marshaled
by this Parcelable object instance.
Value is either 0 or CONTENTS_FILE_DESCRIPTOR |
equals
public final boolean equals (int x, int y)
Returns true if the point's coordinates equal (x,y)
Parameters | |
---|---|
x |
int |
y |
int |
Returns | |
---|---|
boolean |
equals
public boolean equals (Object o)
Indicates whether some other object is "equal to" this one.
The equals
method implements an equivalence relation
on non-null object references:
- It is reflexive: for any non-null reference value
x
,x.equals(x)
should returntrue
. - It is symmetric: for any non-null reference values
x
andy
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any non-null reference values
x
,y
, andz
, ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
. - It is consistent: for any non-null reference values
x
andy
, multiple invocations ofx.equals(y)
consistently returntrue
or consistently returnfalse
, provided no information used inequals
comparisons on the objects is modified. - For any non-null reference value
x
,x.equals(null)
should returnfalse
.
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
Parameters | |
---|---|
o |
Object : the reference object with which to compare. |
Returns | |
---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
hashCode
public int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap
.
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 inequals
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
method, then calling thehashCode
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
equals
method, then calling thehashCode
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.
Returns | |
---|---|
int |
a hash code value for this object. |
offset
public final void offset (int dx, int dy)
Offset the point's coordinates by dx, dy
Parameters | |
---|---|
dx |
int |
dy |
int |
readFromParcel
public void readFromParcel (Parcel in)
Set the point's coordinates from the data stored in the specified parcel. To write a point to a parcel, call writeToParcel().
Parameters | |
---|---|
in |
Parcel : The parcel to read the point's coordinates from
This value cannot be null . |
set
public void set (int x, int y)
Set the point's x and y coordinates
Parameters | |
---|---|
x |
int |
y |
int |
toString
public String toString ()
Returns a string representation of the object.
Returns | |
---|---|
String |
a string representation of the object. |
writeToParcel
public void writeToParcel (Parcel out, int flags)
Write this point to the specified parcel. To restore a point from a parcel, use readFromParcel()
Parameters | |
---|---|
out |
Parcel : The parcel to write the point's coordinates into |
flags |
int : Additional flags about how the object should be written.
May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE .
Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE , and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES |