Question

 this.tModel.insertRow(rowCount,new Object[]  {"","","",""});    
 this.table.setRowSelectionAllowed(true);
 this.table.changeSelection(0, 0, false, false);

 this.table.addKeyListener(new KeyListener() {
      @Override
      public void keyPressed(KeyEvent e) {
          if (e.getKeyCode()==KeyEvent.VK_ENTER) {
               rowCount = this.table.getSelectedRow() + 1;
               tModel.insertRow(rowCount,new Object[]{"", "","",""}); 
          }
      }
 });

我正在尝试创建一个jtable，在运行时通过鼠标单击添加行。我alredy添加了一个默认行。但我不能在那一行上做出选择。并且我想在按下键的操作上添加时将选择更改为新添加的行？请建议一个答案？提前谢谢

Answer 1

首先，我建议您使用key bindings API，KeyListener是一个低级API，事件可以在您看到它们之前消费。

要更改/设置JTable中的行选择，您应该使用JTable#setRowSelectionInterval

InputMap im = getInputMap(WHEN_FOCUSED);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "enter");
ActionMap am = getActionMap();
am.put("enter", new AbstractAction() {
    @Override
    public void actionPerformed(ActionEvent e) {
        int rowCount = table.getSelectedRow() + 1;
        tModel.insertRow(rowCount,new Object[]{"", "","",""});                 
        table.setRowSelectionInterval(rowCount, rowCount);
    }
});

Answer 2

要选择表格中的最后一个条目，您可以使用如下方法：

private void selectLastPossibleEntry() {
    final int rowCount = tableModel.getRowCount();
    final int selectedRowCount = jTable.getSelectedRowCount();
    if (rowCount > 0 && selectedRowCount <= 1) // we do not want do destroy multiple selected lines by the user
        jTable.setRowSelectionInterval(rowCount - 1, rowCount - 1);
}

或更一般：

private void selectLastPossibleEntryForJTable(final JTable jTable) {
    final int rowCount = jTable.getModel().getRowCount();
    final int selectedRowCount = jTable.getSelectedRowCount();
    if (rowCount > 0 && selectedRowCount <= 1) // we do not want do destroy multiple selected lines by the user
        jTable.setRowSelectionInterval(rowCount - 1, rowCount - 1);
}

提示：这不会处理不同的排序

在jtable中添加行

2 个答案: