Java JTable - 如何强制用户只选择一行
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JTable - How to force user to select exactly one row
提问by guitar_freak
I have to implement a JTable in which exactly one row has to be selected (always). Empty selection is not allowed. I'm selecting the first row during initialization:
我必须实现一个 JTable，其中必须选择（总是）一行。不允许空选。我在初始化期间选择第一行：
table.setRowSelectionInterval(0, 0);
additionally, I'm using
另外，我正在使用
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
But user can still deselect one row using CLick + Ctrl.
但是用户仍然可以使用 CLick + Ctrl 取消选择一行。
What is the easiest way ensure, that one (exaclty) row is always selected in the table ?
确保始终在表中选择一行（exaclty）的最简单方法是什么？
采纳答案by MadProgrammer
Now, you could add MouseListeners, SelectionListeners, KeyListeners and key bindings to try and solve this is issue. Or, you could go to the heart of the problem.
现在，您可以添加MouseListeners、SelectionListeners、KeyListeners 和键绑定来尝试解决这个问题。或者，您可以直击问题的核心。
The ListSelectionModelis responsible for managing the selection details.
该ListSelectionModel负责管理该选择的详细信息。
You could simply supply your own ListSelectionModelfor the row selection
您可以简单地ListSelectionModel为行选择提供自己的
public class ForcedListSelectionModel extends DefaultListSelectionModel {
public ForcedListSelectionModel () {
setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
}
@Override
public void clearSelection() {
}
@Override
public void removeSelectionInterval(int index0, int index1) {
}
}
And simply set it to your table...
只需将它放在你的桌子上......
table.setSelectionModel(new ForcedListSelectionModel());
回答by mKorbel
What is the easiest way ensure, that one (exaclty) row is always selected in the table ?
确保始终在表中选择一行（exaclty）的最简单方法是什么？
there are three (basically) selection types
有三种（基本上）选择类型
JTable.setRowSelectionAllowed(boolean);
JTable.setColumnSelectionAllowed(boolean);
JTable.setCellSelectionAllowed(boolean);
edit
编辑
works for me too
对我也有用
int row = table.getSelectedRow();
if ((row > -1)) {
table.setRowSelectionInterval(row, row);
}
}
回答by blackpanther
I would use the JTable#setRowSelectionAllowedas it will ensure that a row can be selected.
我会使用JTable#setRowSelectionAllowed因为它会确保可以选择一行。
回答by Daniel Villanueva
If you have a JTable instance created, just use:
如果您创建了 JTable 实例，只需使用：
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
回答by Matt Reinhart
This code changes it right back to the desired index and it gives the appearance to the user that it never updates.
此代码将其立即更改回所需的索引，并为用户提供永远不会更新的外观。
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.getSelectionModel().addListSelectionListener(
new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
table.setRowSelectionInterval(0,0);
}
);
回答by indika
First do
先做
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.setRowSelectionInterval(0, 0);
then set ListSelectionModel
然后设置 ListSelectionModel
