Java 2D API: 3 - - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

Java 2D API

3.4 Creating a Custom Shape

You can implement the Shape interface to create a class that defines a new type of shape. It doesn't matter how you represent the shape internally, as long as you can implement the Shape interface methods. The Shape must be able to generate a path that specifies its contour.
For example, you could create a simple implementation of Shape that represents polygons as arrays of points. Once the polygon is built, it could be passed to draw, setClip, or any other method that expects a Shape object as an argument.
The PolygonPath class must implement the Shape interface methods:

contains

getBounds

getBounds2D

getPathIterator

intersects

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