Circle

java.lang.Object
- ohos.agp.utils.Circle

```
public class Circle
extends Object
```
Provides circle specifications and alpha values.

从以下版本开始:

5

构造器概要

构造器
构造器说明

Circle(float x, float y, float radius)
A constructor used to create a Circle instance with specified center coordinates and radius.

构造器
构造器	说明
`Circle(float x, float y, float radius)`	A constructor used to create a `Circle` instance with specified center coordinates and radius.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`boolean`	`equals(Object object)`	Indicates whether some other object is "equal to" this one.
`double`	`getArea()`	Obtains the area of this circle.
`Point`	`getCenter()`	Obtains the center of this circle.
`float`	`getCenterX()`	Obtains the x-coordinate of the circle's center.
`float`	`getCenterY()`	Obtains the y-coordinate of the circle's center.
`float`	`getRadius()`	Obtains the radius of this circle.
`int`	`hashCode()`	Returns a hash code value for the object.
`boolean`	`isEmpty()`	Checks whether the radius of this circle is less than zero.
`boolean`	`isInclude(float x, float y)`	Checks whether a specified point (x, y) is included in this circle.
`boolean`	`isInclude(float x1, float y1, float r1)`	Checks whether a circle with specified center coordinates and radius is included in this circle.
`boolean`	`isInclude(Circle circle)`	Checks whether a specified circle is included in this circle.
`boolean`	`isInclude(Point point)`	Checks whether a specified `Point` instance is included in this circle.
`boolean`	`isIntersect(float x1, float y1, float r1)`	Checks whether a circle, with specified center coordinates and radius, intersects this circle.
`boolean`	`isIntersect(Circle circle)`	Checks whether a specified circle intersects this circle.
`void`	`set(float x, float y, float radius)`	Sets attributes of this circle based on the specified center coordinates and radius.
`void`	`set(Circle circle)`	Sets attributes of this circle based on a specified circle.
`void`	`set(Point point, float radius)`	Sets attributes of this circle based on a specified `Point` instance and radius.
`void`	`setCenter(float x, float y)`	Sets the center of this circle based on specified coordinates.
`void`	`setCenter(Point point)`	Sets the center of this circle.
`void`	`setCenterX(float x)`	Sets the x-coordinate for the circle's center.
`void`	`setCenterY(float y)`	Sets the y-coordinate for the circle's center.
`void`	`setEmpty()`	Sets the circle's center coordinates to (0, 0) and the radius to zero.
`void`	`setRadius(float radius)`	Sets the radius for this circle.
`void`	`shrink(float size)`	Shrinks the radius of this circle.
`void`	`stretch(float size)`	Stretches the radius of this circle.
`String`	`toString()`	Returns a string representation of the object.
`void`	`translate(float dx, float dy)`	Translates this circle by a specified distance.
`void`	`translate(Point point)`	Translates this circle, whose offsets on x- and y-axes are specified by a point.
`void`	`zoom(float factor)`	Zooms in or out this circle.

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - Circle
```
public Circle(float x,
              float y,
              float radius)
```
    A constructor used to create a Circle instance with specified center coordinates and radius.
    
    参数:
    
    x - Indicates the specified x-coordinate of the circle's center.
    
    y - Indicates the specified y-coordinate of the circle's center.
    
    radius - Indicates the specified radius of the circle.
    
    从以下版本开始:
    
    5
- 方法详细资料
  - isEmpty
```
public boolean isEmpty()
```
    Checks whether the radius of this circle is less than zero.
    
    返回:
    
    Returns true if the circle's radius is less than zero; returns false otherwise.
    
    从以下版本开始:
    
    5
  - set
```
public void set(float x,
                float y,
                float radius)
```
    Sets attributes of this circle based on the specified center coordinates and radius.
    
    参数:
    
    x - Indicates the specified x-coordinate of the circle's center.
    
    y - Indicates the specified y-coordinate of the circle's center.
    
    radius - Indicates the specified radius.
    
    从以下版本开始:
    
    5
  - setEmpty
```
public void setEmpty()
```
    Sets the circle's center coordinates to (0, 0) and the radius to zero.
    
    从以下版本开始:
    
    5
  - equals
```
public boolean equals(Object object)
```
    从类复制的说明: Object
    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 return true.
    - It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
    - It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
    - It is consistent: for any non-null reference values 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.
    - For any non-null reference value 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.
    覆盖:
    
    equals 在类中 Object
    
    参数:
    
    object - the reference object with which to compare.
    
    返回:
    
    true if this object is the same as the obj argument; false otherwise.
    
    另请参阅:
    
    Object.hashCode(), HashMap
  - hashCode
```
public int hashCode()
```
    从类复制的说明: Object
    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 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 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.)
    覆盖:
    
    hashCode 在类中 Object
    
    返回:
    
    a hash code value for this object.
    
    另请参阅:
    
    Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)
  - toString
```
public String toString()
```
    从类复制的说明: Object
    Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
    The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
    getClass().getName() + '@' + Integer.toHexString(hashCode())
    覆盖:
    
    toString 在类中 Object
    
    返回:
    
    a string representation of the object.
  - set
```
public void set(Point point,
                float radius)
```
    Sets attributes of this circle based on a specified Point instance and radius.
    
    参数:
    
    point - Indicates the circle's center to set.
    
    radius - Indicates the circle's radius to set.
    
    从以下版本开始:
    
    5
  - set
```
public void set(Circle circle)
```
    Sets attributes of this circle based on a specified circle.
    
    参数:
    
    circle - Indicates the specified circle.
    
    从以下版本开始:
    
    5
  - getRadius
```
public float getRadius()
```
    Obtains the radius of this circle.
    
    返回:
    
    Returns the radius of this circle.
    
    从以下版本开始:
    
    5
  - setRadius
```
public void setRadius(float radius)
```
    Sets the radius for this circle.
    
    参数:
    
    radius - Indicates the radius to set.
    
    从以下版本开始:
    
    5
  - getCenter
```
public Point getCenter()
```
    Obtains the center of this circle.
    
    返回:
    
    Returns the center of this circle.
    
    从以下版本开始:
    
    5
  - getCenterX
```
public float getCenterX()
```
    Obtains the x-coordinate of the circle's center.
    
    返回:
    
    Returns the x-coordinate of the circle's center.
    
    从以下版本开始:
    
    5
  - getCenterY
```
public float getCenterY()
```
    Obtains the y-coordinate of the circle's center.
    
    返回:
    
    Returns the y-coordinate of the circle's center.
    
    从以下版本开始:
    
    5
  - setCenter
```
public void setCenter(float x,
                      float y)
```
    Sets the center of this circle based on specified coordinates.
    
    参数:
    
    x - Indicates the x-coordinate of the center to set.
    
    y - Indicates the y-coordinate of the center to set.
    
    从以下版本开始:
    
    5
  - setCenter
```
public void setCenter(Point point)
```
    Sets the center of this circle.
    
    参数:
    
    point - Indicates the center to set.
    
    从以下版本开始:
    
    5
  - setCenterX
```
public void setCenterX(float x)
```
    Sets the x-coordinate for the circle's center.
    
    参数:
    
    x - Indicates the x-coordinate to set.
    
    从以下版本开始:
    
    5
  - setCenterY
```
public void setCenterY(float y)
```
    Sets the y-coordinate for the circle's center.
    
    参数:
    
    y - Indicates the y-coordinate to set.
    
    从以下版本开始:
    
    5
  - isInclude
```
public boolean isInclude(float x,
                         float y)
```
    Checks whether a specified point (x, y) is included in this circle.
    
    参数:
    
    x - Indicates the x-coordinate of the specified point.
    
    y - Indicates the y-coordinate of the specified point.
    
    返回:
    
    Returns true if the specified point is included in the circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - isInclude
```
public boolean isInclude(Point point)
```
    Checks whether a specified Point instance is included in this circle.
    
    参数:
    
    point - Indicates the specified Point instance.
    
    返回:
    
    Returns true if the specified Point instance is included in this circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - isInclude
```
public boolean isInclude(float x1,
                         float y1,
                         float r1)
```
    Checks whether a circle with specified center coordinates and radius is included in this circle.
    
    参数:
    
    x1 - Indicates the x-coordinate of the specified circle's center.
    
    y1 - Indicates the y-coordinate of the specified circle's center.
    
    r1 - Indicates the radius of the specified circle.
    
    返回:
    
    Returns true if the specified circle is included in this circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - isInclude
```
public boolean isInclude(Circle circle)
```
    Checks whether a specified circle is included in this circle.
    
    参数:
    
    circle - Indicates the specified circle.
    
    返回:
    
    Returns true if the specified circle is included in this circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - isIntersect
```
public boolean isIntersect(float x1,
                           float y1,
                           float r1)
```
    Checks whether a circle, with specified center coordinates and radius, intersects this circle.
    
    参数:
    
    x1 - Indicates the x-coordinate of the specified circle's center.
    
    y1 - Indicates the y-coordinate of the specified circle's center.
    
    r1 - Indicates the radius of the specified circle.
    
    返回:
    
    Returns true if the specified circle intersects this circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - isIntersect
```
public boolean isIntersect(Circle circle)
```
    Checks whether a specified circle intersects this circle.
    
    参数:
    
    circle - Indicates the specified circle.
    
    返回:
    
    Returns true if the specified circle intersects this circle; returns false otherwise.
    
    从以下版本开始:
    
    5
  - zoom
```
public void zoom(float factor)
```
    Zooms in or out this circle.
    
    参数:
    
    factor - Indicates the zoom factor.
    
    从以下版本开始:
    
    5
  - stretch
```
public void stretch(float size)
```
    Stretches the radius of this circle.
    
    参数:
    
    size - Indicates the length to extend the radius.
    
    从以下版本开始:
    
    5
  - shrink
```
public void shrink(float size)
```
    Shrinks the radius of this circle.
    
    参数:
    
    size - Indicates the length to chop from the original radius.
    
    从以下版本开始:
    
    5
  - translate
```
public void translate(float dx,
                      float dy)
```
    Translates this circle by a specified distance.
    
    参数:
    
    dx - Indicates the offset of the circle on the x-axis.
    
    dy - Indicates the offset of the circle on the y-axis.
    
    从以下版本开始:
    
    5
  - translate
```
public void translate(Point point)
```
    Translates this circle, whose offsets on x- and y-axes are specified by a point.
    
    参数:
    
    point - Indicates the point that specifies the circle's offsets on x- and y-axes.
    
    从以下版本开始:
    
    5
  - getArea
```
public double getArea()
```
    Obtains the area of this circle.
    
    返回:
    
    Returns the area of this circle.
    
    从以下版本开始:
    
    5

类 Circle

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

Circle

方法详细资料

isEmpty

set

setEmpty

equals

hashCode

toString

set

set

getRadius

setRadius

getCenter

getCenterX

getCenterY

setCenter

setCenter

setCenterX

setCenterY

isInclude

isInclude

isInclude

isInclude

isIntersect

isIntersect

zoom

stretch

shrink

translate

translate

getArea