< JTable> .getSelectedRow（）返回-1 [英] <JTable>.getSelectedRow() is returning -1

问题描述

我在 JTable 上写了一个双击事件。我的JTable，即。 myTaskTable填充了许多具有多列的行。我希望在双击 JTable 的其中一行时检索行索引。我不知道为什么它总是返回-1的索引导致异常。我忽略了什么吗？可能出现什么问题？

I have written a "double-click" event on my JTable. My JTable, viz. myTaskTable is populated with a number of rows having multiple columns. I want the row index to be retrieved when I double click on one of the rows of the JTable. I am not sure why is it always returning me an index of -1 resulting in an exception. Am I am overlooking something? What could be going wrong?

这就是我从 JTable 中检索所选行的索引的方法 - myTaskTable

This is how I am retrieving the index of the selected row from the JTable - myTaskTable

int selRow = myTaskTable.getSelectedRow();

谢谢！

编辑

以下是代码：

...
myTaskTable.addMouseListener(this);
...
public void mouseClicked(MouseEvent e)
{
 if(e.getModifiers() == MouseEvent.BUTTON1_MASK)
 {
   if(e.getClickCount() == 2)
   {
     e.consume();
     int selRow = myTaskTable.getSelectedRow();
     System.out.println("GridReport double clicked on row="+selRow);
    }
  }
}

推荐答案

使用事件获取行索引，而不是表选择：

Get the row index using the event, not the table selection:

final int selectedRowIndex = table.rowAtPoint(mouseEvent.getPoint());
// If the rows are sorted or filtered
final int modelRowIndex = table.convertRowIndexToModel(selectedRowIndex);

getSelectedRow（）不适用于多个选定的行（允许多个选择），因为它将始终返回第一个选定行的索引。

getSelectedRow() would not work with multiple selected rows (multiple selections allowed), as it will always return "the index of the first selected row".

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