我写了一段代码,使字母在我写的时候出现并飞行。该问题占用大量内存。
我已经对其进行了一点优化
path
对象并在侦听器中更新其参数。但是它仍然使用大量内存,因此有关如何减少其内存利用率的任何想法?
提前致谢。
package sample;
import javafx.animation.PathTransition;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
Pane root = new Pane();
Scene scene = new Scene(root);
root.setCache(false);
primaryStage.setTitle("Hello World");
primaryStage.setScene(scene);
Path path = new Path();
root.widthProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> SetPathElements(path, root));
root.heightProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> SetPathElements(path, root));
Duration duration = Duration.millis(1000);
scene.setOnKeyPressed(event -> {
System.gc();
Text textNode = new Text(event.getText());
textNode.setFont(Font.font(50));
textNode.setFill(Color.ORANGE);
root.getChildren().add(textNode);
PathTransition pathTransition = new PathTransition();
pathTransition.setDuration(duration);
pathTransition.setPath(path);
pathTransition.setCycleCount(1);
pathTransition.setNode(textNode);
pathTransition.setOnFinished(event1 -> {
root.getChildren().remove(textNode);
pathTransition.setNode(null);
pathTransition.setPath(null);
textNode.setFont(null);
textNode.setFill(null);
});
pathTransition.play();
});
primaryStage.show();
}
private void SetPathElements(Path path, Pane root) {
path.getElements().clear();
double w = root.getWidth();
double h = root.getHeight();
path.getElements().add(new MoveTo(w / 2, h));
path.getElements().add(new LineTo(w / 2, -40));
}
}
操作系统:Arch Linux 64位平台:Intel i7-3rd generation,8 GB ram IDE:Intellij JDK:1.8.0_102
泄漏证明:键入约100个字符后,它从50 MB跃升至1.3 GB
There is a memory leak in JavaFX with Mesa >=11.0 (meaning any up to date Linux distribution). JavaFX developers say it's a bug in Mesa, but I couldn't find a bug report in Mesa (nor could I file one, as I don't know how to reproduce it outside of JavaFX).
The only solutions as of now are -
1. Use an older Linux (the key is having Mesa 10 or lower)
2. Use an NVidia GPU - they have their own OpenGL implementation and don't rely on Mesa.
3. Use Windows.
Update (November 2016)
This issue seems to have been resolved in newer versions of Mesa and/or X.org. Updating to Mesa 13.0 and X.org >=1.18.4 should solve this issue.
Related links:
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