无法在 JavaFX 中加载图像

javafx java javafx-2

2022-09-02 14:15:45

我测试了此代码，以便创建带有图像的对话。

final int xSize = 400;
final int ySize = 280;
final Color backgroundColor = Color.WHITE;
final String text = "SQL Browser";
final String version = "Product Version: 1.0";

final Stage aboutDialog = new Stage();
aboutDialog.initModality(Modality.WINDOW_MODAL);

Button closeButton = new Button("Close");

closeButton.setOnAction(new EventHandler<ActionEvent>() {
    @Override
    public void handle(ActionEvent arg0) {
        aboutDialog.close();
    }
});

GridPane grid = new GridPane();
grid.setAlignment(Pos.CENTER);
grid.setHgap(10);
grid.setVgap(10);
grid.setPadding(new Insets(25, 25, 25, 25));

Image img = new Image("logo.png");
ImageView imgView = new ImageView(img);

grid.add(imgView, 0, 0);

grid.add(new Text(text), 0, 1);
grid.add(new Text(version), 0, 2);
grid.add(closeButton, 14, 18);

Scene aboutDialogScene = new Scene(grid, xSize, ySize, backgroundColor);
aboutDialog.setScene(aboutDialogScene);
aboutDialog.show();

我将图像文件放入目录。但由于某种原因，图像未显示。你能帮我纠正我的错误吗？/src

答案 1

只需替换此代码：

Image img = new Image("logo.png");

有了这个

Image img = new Image("file:logo.png");

文档参考。https://docs.oracle.com/javase/8/javafx/api/javafx/scene/image/Image.html

当您将 a 传递给类时，可以通过四种不同的方式（从文档复制）进行处理：StringImage

// The image is located in default package of the classpath
Image image1 = new Image("/flower.png");

// The image is located in my.res package of the classpath
Image image2 = new Image("my/res/flower.png");

// The image is downloaded from the supplied URL through http protocol
Image image3 = new Image("http://sample.com/res/flower.png");

// The image is located in the current working directory
Image image4 = new Image("file:flower.png");

前缀只是一个 URI 方案，换句话说，就是协议分类器的对应物。这也适用于文件浏览器或 Web 浏览器...;)file:http:

如需进一步参考，您可以查看文件 URI 方案的 wiki 页面：https://en.wikipedia.org/wiki/File_URI_scheme

快乐编码，

卡拉施

答案 2

试试这个：

img = new Image("/logo.png");

如果没有给出指示 URL（如 http： 或 file：）的协议部分，则该文件应驻留在默认包中。如果你想把它放在一个不同的包中，比如com.my.images，你可以用类似路径的方式添加这些信息：

img = new Image("/com/my/images/logo.png");