相关疑难解决方法(0)

为了练习JavaFX,我构建了一个绘制Sierpinski Triangles的简单应用程序.

import javafx.application.Application;
import javafx.application.Platform;
import javafx.concurrent.Task;
import javafx.geometry.Insets;
import javafx.geometry.Point2D;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class SierpinskiTriangles extends Application {

    private final int PADDING = 5;
    private static int numberOfLevels;

    public static void launch(String... args){

        numberOfLevels = 8;

        if((args != null) && (args.length > 0)) {

            int num = -1;
            try {
                num = Integer.parseInt(args[0]);
            } catch (NumberFormatException ex) {
                            ex.printStackTrace();
                return; …