Question

我在尝试运行显示图像的代码时获得了很大的跟踪，但是我不确定为什么代码没有运行。有什么想法吗？

 static constexpr bool value { true };

我还尝试了一个小测试课程，确认我是否有正确的JPG路径并且似乎工作正常，所以我不认为问题在于JPG路径。为了澄清，JPG位于类文件夹中，而不是在src文件夹中

public class SplashScreen extends Application {

    public static void main(String[] args) {

        Application.launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        //Parent rootNode = null;

        Group root = new Group();
        Scene scene = new Scene(root, 500, 500);

        GridPane gridpane = new GridPane();
        gridpane.setPadding(new Insets(5));
        gridpane.setHgap(10);
        gridpane.setVgap(10);

        ImageView algLogo = new ImageView();
        Image logo = new Image("D:/Users/Tozu/workspace/ACA 5 OOJP/AlgonquinCollegeLogo.jpg");
        algLogo.setImage(logo);

        final HBox pictureRegion = new HBox();

        pictureRegion.getChildren().add(algLogo);
        gridpane.add(pictureRegion, 1, 1);

        root.getChildren().add(gridpane);

        stage.setTitle("ACA 5");
        stage.setScene(scene);
        stage.show();       

    }

Answer 1

您必须设置URL文件协议

Image logo = new Image("file:D:/Users/Tozu/workspace/ACA 5 OOJP/AlgonquinCollegeLogo.jpg");
                        ^ here

来自图片https://docs.oracle.com/javafx/2/api/javafx/scene/image/Image.html

的文档

// load an image and resize it only in one dimension, to the height of 100 and
// the original width, without preserving original aspect ratio
// The image is located in the current working directory
Image image4 = new Image("file:flower.png", 0, 100, false, false);

执行相同操作的更好方法是使用File对象（由James_D建议）

File f = new File("D:/Users/Tozu/workspace/ACA 5 OOJP/AlgonquinCollegeLogo.jpg");
Image logo = new Image(f.toURI().toString());

Java：Application Start Method错误中的异常

1 个答案: