"<i>Java Swing JTable;<\/i> Java Swing JTable；<\/b> <i>Right Click Menu (How do I get it to &quot;select&quot; aka highlight the row)<\/i>右键单击菜单（如何让它“选择”也就是突出显示该行）<\/b>"

Question

Short: I need a "right-click event" to highlight the cell row.

if (evt.getButton() == java.awt.event.MouseEvent.BUTTON3) {
          System.out.println("Right Click");
          JPopUpMenu.show(myJTable, evt.getX(), evt.getY())
}

Answer 1

like this:

table.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseReleased(MouseEvent e) {
        int r = table.rowAtPoint(e.getPoint());
        if (r >= 0 && r < table.getRowCount()) {
            table.setRowSelectionInterval(r, r);
        } else {
            table.clearSelection();
        }

        int rowindex = table.getSelectedRow();
        if (rowindex < 0)
            return;
        if (e.isPopupTrigger() && e.getComponent() instanceof JTable ) {
            JPopupMenu popup = createYourPopUp();
            popup.show(e.getComponent(), e.getX(), e.getY());
        }
    }
});

......

Answer 2

The accepted answer does not take modifier keys like ctrl or shift into account, yet they indicate that the current selection should not be replaced, but extended.

Also, I added multi-OS support by checking mousePressed and mouseReleased .

Following, you can find a complete example on how to adjust the selected rows, using the ListSelectionModel , including MouseEvent#getModifiers checks. After that, it is possible to open a (optional) JPopupMenu .

JPopupMenu contextMenu = new JPopupMenu();
// ...
// add elements to the popup menu
// ...

table.addMouseListener(new MouseAdapter() {
  @Override
  public void mousePressed(MouseEvent e) {
    handleRowClick(e);
    if (e.isPopupTrigger()) {
      doPop(e);
    } else {
      hidePop();
    }
  }

  @Override
  public void mouseReleased(MouseEvent e) {
    if (e.isPopupTrigger()) {
      doPop(e);
    }
  }

  private void handleRowClick(MouseEvent e) {
    ListSelectionModel selectionModel = table.getSelectionModel();
    Point contextMenuOpenedAt = e.getPoint();
    int clickedRow = table.rowAtPoint(contextMenuOpenedAt);

    if (clickedRow < 0) {
      // No row selected
      selectionModel.clearSelection();
    } else {
      // Some row selected
      if ((e.getModifiers() & InputEvent.SHIFT_MASK) == InputEvent.SHIFT_MASK) {
        int maxSelect = selectionModel.getMaxSelectionIndex();

        if ((e.getModifiers() & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK) {
          // Shift + CTRL
          selectionModel.addSelectionInterval(maxSelect, clickedRow);
        } else {
          // Shift
          selectionModel.setSelectionInterval(maxSelect, clickedRow);
        }
      } else if ((e.getModifiers() & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK) {
        // CTRL
        selectionModel.addSelectionInterval(clickedRow, clickedRow);
      } else {
        // No modifier key pressed
        selectionModel.setSelectionInterval(clickedRow, clickedRow);
      }
    }
  }

  private void doPop(MouseEvent e) {
    if (table.getSelectedRowCount() == 0) {
      return;
    }
    contextMenu.setVisible(true);
    contextMenu.show(e.getComponent(), e.getX(), e.getY());
  }

  private void hidePop() {
    contextMenu.setVisible(false);
  }
});

Answer 3

I found this solution that creates another MouseEvent to work well inside my JTable subclass (processMouseEvent has protected access). Takes care of using the modifiers for the selection update.

addMouseListener(new MouseAdapter() {
    @Override public void mousePressed(MouseEvent e) { checkForPopupMenu(e); }
    @Override public void mouseReleased(MouseEvent e) { checkForPopupMenu(e); }
    private void checkForPopupMenu(MouseEvent e) {
        if (e.isPopupTrigger()) {
            processMouseEvent(new MouseEvent(e.getComponent(), e.getID(), e.getWhen(), e.getModifiersEx(), e.getX(), e.getY(), e.getClickCount(), false, MouseEvent.BUTTON1));
            if (getSelectedRowCount() != 0)
                popup.show(e.getComponent(), e.getX(), e.getY());
        }
    }
});