为什么启用TableMenuButton时Java FX TreeTableView会泄漏内存?

时间:2017-11-24 00:08:57

标签: java memory-leaks treetableview java-memory-leaks

启用TableMenu时,我遇到使用TreeTableView的内存泄漏。重现的步骤很简单。我已经做了一些研究,为什么会发生这种情况,但是会留给这里的专家来解释一下。

使用-Xmx 256m运行嵌入式代码以减少等待时间。我正在运行JDK 1.8.0_121

必须按顺序执行这两个步骤。

  1. 点击表格菜单菜单按钮右上角(+)只需一次,无需选择任何菜单项。
  2. 然后点击 DYNAMIC 列上的(X)(将其提供给OOM几秒钟)

        package hellofx;
    
        import javafx.application.Application;
        import javafx.application.Platform;
        import javafx.scene.Scene;
        import javafx.scene.control.Button;
        import javafx.scene.control.TreeItem;
        import javafx.scene.control.TreeTableCell;
        import javafx.scene.control.TreeTableColumn;
        import javafx.scene.control.TreeTableView;
        import javafx.stage.Stage;
    
        public class TreeTableMemoryLeak extends Application {
            public static void main(String[] args) {
                launch(args);
            }
    
            @Override
            public void start(Stage stage) {
                TreeTableView<Object> otable = buildTableView();
                Platform.runLater(()->{
                    Scene scene = new Scene(otable,otable.getWidth(),otable.getHeight());
                    stage.setScene(scene);
                    stage.show();
                });
            }
    
            private TreeTableView<Object> buildTableView() {
                TreeTableView<Object> table = new TreeTableView<>();
                TreeTableColumn<Object, String> indexCol = new TreeTableColumn<>("Index");
                indexCol.setCellFactory(column -> {
                    return new TreeTableCell<Object, String>() {
                        @Override
                        protected void updateItem(String item, boolean empty) {
                            setText(String.valueOf(getIndex()));
                        }
                    };
                });
                TreeTableColumn<Object, String> dynCol = new TreeTableColumn<>("DYNAMIC");
                dynCol.setGraphic(new Button("X"){
                    {
                        //ATTENTION 3 (On click of X remove all columns except first column)
                        setOnAction((e)->dynCol.getColumns().removeIf(c->c!=dynCol.getColumns().get(0)));
                    }
                });
                //ATTENTION 1
                table.setTableMenuButtonVisible(true);
    
                //ATTENTION 2 (39 is the magic number anything higher it will OOM on my device I have total 6G physical.)
                for(int i=0;i<39;i++){
                    dynCol.getColumns().add(new TreeTableColumn<>(String.valueOf(i)));
                }
                table.getColumns().addAll(indexCol,dynCol);
                table.setEditable(true);
                table.setRoot(new TreeItem<Object>());
                return table;
            }
        }
    

    Running Application Image

0 个答案:

没有答案