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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/GradientPaint.html below:

GradientPaint (Java SE 19 & JDK 19)

All Implemented Interfaces:

Paint, Transparency

The

class provides a way to fill a

with a linear color gradient pattern. If

P1 with

C1 and

P2 with

C2 are specified in user space, the

on the P1, P2 connecting line is proportionally changed from C1 to C2. Any point P not on the extended P1, P2 connecting line has the color of the point P' that is the perpendicular projection of P on the extended P1, P2 connecting line. Points on the extended line outside of the P1, P2 segment can be colored in one of two ways.

• If the gradient is cyclic then the points on the extended P1, P2 connecting line cycle back and forth between the colors C1 and C2.
• If the gradient is acyclic then points on the P1 side of the segment have the constant Color C1 while points on the P2 side have the constant Color C2.

See Also:

• Paint
• Graphics2D.setPaint(java.awt.Paint)

• Field Summary
• Constructor Summary

  Constructors

  Constructs a simple acyclic GradientPaint object.

  Constructs either a cyclic or acyclic GradientPaint object depending on the boolean parameter.

  Constructs a simple acyclic GradientPaint object.

  Constructs either a cyclic or acyclic GradientPaint object depending on the boolean parameter.

• Method Summary

  Creates and returns a

  PaintContext

  used to generate a linear color gradient pattern.

  Returns the color C1 anchored by the point P1.

  Returns the color C2 anchored by the point P2.

  Returns a copy of the point P1 that anchors the first color.

  Returns a copy of the point P2 which anchors the second color.

  int

  Returns the transparency mode for this GradientPaint.

  boolean

  Returns true if the gradient cycles repeatedly between the two colors C1 and C2.

  Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Constructor Details
  • GradientPaint public GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2)

    Constructs a simple acyclic GradientPaint object.

    Parameters:

    x1 - x coordinate of the first specified Point in user space

    y1 - y coordinate of the first specified Point in user space

    color1 - Color at the first specified Point

    x2 - x coordinate of the second specified Point in user space

    y2 - y coordinate of the second specified Point in user space

    color2 - Color at the second specified Point

    Throws:

    NullPointerException - if either one of colors is null

  • GradientPaint

    Constructs a simple acyclic GradientPaint object.

    Parameters:

    pt1 - the first specified Point in user space

    color1 - Color at the first specified Point

    pt2 - the second specified Point in user space

    color2 - Color at the second specified Point

    Throws:

    NullPointerException - if either one of colors or points is null

  • GradientPaint public GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2, boolean cyclic)

    Constructs either a cyclic or acyclic GradientPaint object depending on the boolean parameter.

    Parameters:

    x1 - x coordinate of the first specified Point in user space

    y1 - y coordinate of the first specified Point in user space

    color1 - Color at the first specified Point

    x2 - x coordinate of the second specified Point in user space

    y2 - y coordinate of the second specified Point in user space

    color2 - Color at the second specified Point

    cyclic - true if the gradient pattern should cycle repeatedly between the two colors; false otherwise

  • GradientPaint

    Constructs either a cyclic or acyclic GradientPaint object depending on the boolean parameter.

    Parameters:

    pt1 - the first specified Point in user space

    color1 - Color at the first specified Point

    pt2 - the second specified Point in user space

    color2 - Color at the second specified Point

    cyclic - true if the gradient pattern should cycle repeatedly between the two colors; false otherwise

    Throws:

    NullPointerException - if either one of colors or points is null

• Method Details
  • getPoint1

    Returns a copy of the point P1 that anchors the first color.

    Returns:

    a Point2D object that is a copy of the point that anchors the first color of this GradientPaint.

  • getColor1 public Color getColor1

    ()

    Returns the color C1 anchored by the point P1.

    Returns:

    a Color object that is the color anchored by P1.

  • getPoint2

    Returns a copy of the point P2 which anchors the second color.

    Returns:

    a Point2D object that is a copy of the point that anchors the second color of this GradientPaint.

  • getColor2 public Color getColor2

    ()

    Returns the color C2 anchored by the point P2.

    Returns:

    a Color object that is the color anchored by P2.

  • isCyclic

    public boolean isCyclic()

    Returns true if the gradient cycles repeatedly between the two colors C1 and C2.

    Returns:

    true if the gradient cycles repeatedly between the two colors; false otherwise.

  • createContext

    Creates and returns a

    PaintContext

    used to generate a linear color gradient pattern. See the

    specification

    of the method in the

    Paint

    interface for information on null parameter handling.

    Specified by:

    createContext in interface Paint

    Parameters:

    cm - the preferred ColorModel which represents the most convenient format for the caller to receive the pixel data, or null if there is no preference.

    deviceBounds - the device space bounding box of the graphics primitive being rendered.

    userBounds - the user space bounding box of the graphics primitive being rendered.

    xform - the AffineTransform from user space into device space.

    hints - the set of hints that the context object can use to choose between rendering alternatives.

    Returns:

    the PaintContext for generating color patterns.

    See Also:

    • Paint
    • PaintContext
    • ColorModel
    • Rectangle
    • Rectangle2D
    • AffineTransform
    • RenderingHints

  • getTransparency

    public int getTransparency()

    Returns the transparency mode for this GradientPaint.

    Specified by:

    getTransparency in interface Transparency

    Returns:

    an integer value representing this GradientPaint object's transparency mode.

    See Also:

    • Transparency

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