摘要：
import javafx.application.Application;import javafx.scene.Group;import javafx.scene.Scene;import javafx.scene.paint.Color;import javafx.scene.paint.CycleMethod;import javafx.scene.paint.RadialGradient;import javafx.scene.paint.Stop;import javafx.scene.shape.Circle;import javafx.stage.Stage;public cl 阅读全文