使用键盘滚动其弹出列表时如何使 JComboBox 所选项

问题描述

我在面板中有一个 JComboBox 组件并附加了 ItemListener.但它会在每次向上/向下按键后触发(当滚动打开的弹出列表时).我想在用户接受选择后更改选择的值，例如按 Enter 键.

I have a JComboBox component in the panel and ItemListener attached to it. But it gets fired after every up/down keypress (when scrolling though opened popup list). I want to change the selected value after the user accepts selection by pressing for example Enter key.

使用鼠标时不是这种情况.当我将鼠标移到组合框的列表上时，突出显示跟随鼠标指针，但在我按下鼠标按钮之前，所选项目不会改变.我希望键盘具有相同的行为，即通过向上/向下箭头移动突出显示不会更改所选项目，但按 Enter 会.

This is not a case when using mouse. When I move mouse over the combobox's list the highlight follows mouse pointer, but selected item is not changed until I press the mouse button. I would like to have the same behavior for keyboard, i.e. moving highlight via up/down arrow does not change selected item, but pressing Enter does.

推荐答案

相信你应该可以做到:

comboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);

在您将 comboBox 实例创建为 获取此功能

after you have created your comboBox instance to get this functionality

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