JavaFX：清除ListView [英] JavaFX: Clearing the ListView

问题描述

我想在点击某个按钮时清除ListView中的所有内容。我试图通过索引删除它，但它给了我例外。我没有完全得到ListView的SelectionModel。以下是我的尝试：

I want to clear all content from the ListView when I click on some button. I was trying to remove it by indices but it was giving me exceptions. I don't quite get the SelectionModel of ListView. Here are my attempts:

asiLogsListView.getSelectionModel().selectAll();
        ObservableList<Integer> indices = asiLogsListView.getSelectionModel().getSelectedIndices();
        for(int index : indices) {
            asiLogsListView.getSelectionModel().getSelectedItems().remove(index);
        }

或

asiLogsListView.getSelectionModel().getSelectedItems().removeAll(indices);

推荐答案

清除<$ c $中的所有商品c> ListView ，只需执行

asiLogsListView.getItems().clear();

如果要清除选择，请执行

If you want to clear the selection, then do

asiLogsListView.getSelectionModel().clearSelection();

棘手的是从 ListView中删除所有选定的项目：

List<Integer> selectedItemsCopy = new ArrayList<>(asiLogsListView.getSelectionModel().getSelectedItems());
asiLogsListView.getItems().removeAll(selectedItemsCopy);

您的代码看起来正在尝试清除选择，因为您试图删除所有元素来自 selectionModel 的 selectedItems 列表。问题是，当您删除每个项目时，其余项目的索引会发生变化，因此您最终会删除错误的项目，并可能最终导致 ArrayIndexOutOfBoundsException s（如果您的项目数量少于所选项目的最大索引数。）

Your code looks like it is trying to clear the selection, because you are trying to remove all the elements from the selectionModel's selectedItems list. The problem is that as you remove each item, the index of the remaining items would change, so you end up removing the wrong items, and potentially may end up with ArrayIndexOutOfBoundsExceptions (if you end up with fewer items than the largest index of a selected item).

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