java - How to prevent JTable from returning to the first row when Tab is pressed?

Question

How can I disable JTable's default behaviour of returning to the first row, when tab key is pressed in the last cell of the table? Instead the current cell should keep its focus.

Answer 1

简短的回答：找到绑定到选项卡的操作，将其包装到自定义操作中，仅当不在最后一个单元格中时才委托给原始操作，并用您的自定义实现替换原始操作。

在代码中：

KeyStroke keyStroke = KeyStroke.getKeyStroke("TAB");
Object actionKey = table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
        .get(keyStroke );
final Action action = table.getActionMap().get(actionKey);
Action wrapper = new AbstractAction() {

    @Override
    public void actionPerformed(ActionEvent e) {
        JTable table = (JTable) e.getSource();
        int lastRow = table.getRowCount() - 1;
        int lastColumn = table.getColumnCount() -1;
        if (table.getSelectionModel().getLeadSelectionIndex() == lastRow 
                && table.getColumnModel().getSelectionModel()
                        .getLeadSelectionIndex() == lastColumn) {
              return;
        }
        action.actionPerformed(e);
    }

};
table.getActionMap().put(actionKey, wrapper);