随着时间的推移,我有一个
javafx应用程序内存不断增加.这让我很困惑,因为我认为我的代码中有内存泄漏.

我发现每次更新tableview数据时内存都会增加,没有任何新对象只是更新旧数据.

以下代码的目的是重现相同的问题

public class TableViewSample extends Application {

    private boolean running = false;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        stage.setTitle("Table View Sample");

        TableView<Foo> table = new TableView<>();
        ObservableList<Foo> data = FXCollections.observableArrayList(
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0),
                new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0), new Foo(0, 0, 0, 0)
        );
        Random random = new Random();

        TableColumn<Foo, Integer> num1Col = new TableColumn<>("num1");
        num1Col.setCellValueFactory(new PropertyValueFactory<>("num1"));
        TableColumn<Foo, Integer> num2Col = new TableColumn<>("num2");
        num2Col.setCellValueFactory(new PropertyValueFactory<>("num2"));
        TableColumn<Foo, Integer> num3Col = new TableColumn<>("num3");
        num3Col.setCellValueFactory(new PropertyValueFactory<>("num3"));
        TableColumn<Foo, Integer> num4Col = new TableColumn<>("num4");
        num4Col.setCellValueFactory(new PropertyValueFactory<>("num4"));

        table.setItems(data);
        table.getColumns().addAll(num1Col, num2Col, num3Col, num4Col);

        Timeline timeline = new Timeline(new KeyFrame(Duration.seconds(1), event -> {
            for (Foo foo : data) {
                foo.setNum1(random.nextInt(1000));
                foo.setNum2(random.nextInt(1000));
                foo.setNum3(random.nextInt(1000));
                foo.setNum4(random.nextInt(1000));
            }
        }));
        timeline.setCycleCount(Timeline.INDEFINITE);

        Button btn = new Button("start");
        btn.setOnAction(event -> {
            if (running) {
                timeline.stop();
                running = false;
                btn.setText("start");
            } else {
                timeline.play();
                running = true;
                btn.setText("stop");
            }
            event.consume();
        });

        VBox vbox = new VBox();
        vbox.getChildren().addAll(btn, table);
        ((Group) scene.getRoot()).getChildren().add(vbox);

        stage.setScene(scene);
        stage.show();

    }

    public static class Foo {
        private SimpleIntegerProperty num1;
        private SimpleIntegerProperty num2;
        private SimpleIntegerProperty num3;
        private SimpleIntegerProperty num4;


        public Foo(int num1, int num2, int num3, int num4) {
            this.num1 = new SimpleIntegerProperty(num1);
            this.num2 = new SimpleIntegerProperty(num2);
            this.num3 = new SimpleIntegerProperty(num3);
            this.num4 = new SimpleIntegerProperty(num4);
        }

        public int getNum1() {
            return num1.get();
        }

        public SimpleIntegerProperty num1Property() {
            return num1;
        }

        public void setNum1(int num1) {
            this.num1.set(num1);
        }

        public int getNum2() {
            return num2.get();
        }

        public SimpleIntegerProperty num2Property() {
            return num2;
        }

        public void setNum2(int num2) {
            this.num2.set(num2);
        }

        public int getNum3() {
            return num3.get();
        }

        public SimpleIntegerProperty num3Property() {
            return num3;
        }

        public void setNum3(int num3) {
            this.num3.set(num3);
        }

        public int getNum4() {
            return num4.get();
        }

        public SimpleIntegerProperty num4Property() {
            return num4;
        }

        public void setNum4(int num4) {
            this.num4.set(num4);
        }
    }
}

我做错了什么以及如何解决这种记忆增加的问题？

最佳答案 在相同的jdk版本的Windows上品尝相同的代码,一切都很好.

我使用不同的jdk版本在ubuntu上构建了两次可执行jar,并在windows和ubuntu上测试了它,并在两个平台上产生相同的问题.所以无论使用什么jdk版本,ubuntu jdk都会产生同样的问题,我现在将继续在Windows上编码,稍后会尝试新的ubuntu安装.谢谢你的帮助

编辑：
经过一番搜索发现一些相关的bug报告JDK-8161997,JDK-8161911似乎与JavaFX有关的问题是使用硬件管道.
在一个新的ubuntu 18.04安装后,一切正常.