We can see the input map for a JTable by looking at the source for BasicLookAndFeel. We quickly see that multiple keys are indeed mapped to the same action.
1476 "Table.ancestorInputMap",
1477 new UIDefaults.LazyInputMap(new Object[] {
1478 "ctrl C", "copy",
1479 "ctrl V", "paste",
1480 "ctrl X", "cut",
1481 "COPY", "copy",
1482 "PASTE", "paste",
1483 "CUT", "cut",
1484 "control INSERT", "copy",
1485 "shift INSERT", "paste",
1486 "shift DELETE", "cut",
1487 "RIGHT", "selectNextColumn",
1488 "KP_RIGHT", "selectNextColumn",
1489 "shift RIGHT", "selectNextColumnExtendSelection",
1490 "shift KP_RIGHT", "selectNextColumnExtendSelection",
1491 "ctrl shift RIGHT", "selectNextColumnExtendSelection",
1492 "ctrl shift KP_RIGHT", "selectNextColumnExtendSelection",
1493 "ctrl RIGHT", "selectNextColumnChangeLead",
1494 "ctrl KP_RIGHT", "selectNextColumnChangeLead",
1495 "LEFT", "selectPreviousColumn",
1496 "KP_LEFT", "selectPreviousColumn",
1497 "shift LEFT", "selectPreviousColumnExtendSelection",
1498 "shift KP_LEFT", "selectPreviousColumnExtendSelection",
1499 "ctrl shift LEFT", "selectPreviousColumnExtendSelection",
1500 "ctrl shift KP_LEFT", "selectPreviousColumnExtendSelection",
1501 "ctrl LEFT", "selectPreviousColumnChangeLead",
1502 "ctrl KP_LEFT", "selectPreviousColumnChangeLead",
1503 "DOWN", "selectNextRow",
1504 "KP_DOWN", "selectNextRow",
1505 "shift DOWN", "selectNextRowExtendSelection",
1506 "shift KP_DOWN", "selectNextRowExtendSelection",
1507 "ctrl shift DOWN", "selectNextRowExtendSelection",
1508 "ctrl shift KP_DOWN", "selectNextRowExtendSelection",
1509 "ctrl DOWN", "selectNextRowChangeLead",
1510 "ctrl KP_DOWN", "selectNextRowChangeLead",
1511 "UP", "selectPreviousRow",
1512 "KP_UP", "selectPreviousRow",
1513 "shift UP", "selectPreviousRowExtendSelection",
1514 "shift KP_UP", "selectPreviousRowExtendSelection",
1515 "ctrl shift UP", "selectPreviousRowExtendSelection",
1516 "ctrl shift KP_UP", "selectPreviousRowExtendSelection",
1517 "ctrl UP", "selectPreviousRowChangeLead",
1518 "ctrl KP_UP", "selectPreviousRowChangeLead",
1519 "HOME", "selectFirstColumn",
1520 "shift HOME", "selectFirstColumnExtendSelection",
1521 "ctrl shift HOME", "selectFirstRowExtendSelection",
1522 "ctrl HOME", "selectFirstRow",
1523 "END", "selectLastColumn",
1524 "shift END", "selectLastColumnExtendSelection",
1525 "ctrl shift END", "selectLastRowExtendSelection",
1526 "ctrl END", "selectLastRow",
1527 "PAGE_UP", "scrollUpChangeSelection",
1528 "shift PAGE_UP", "scrollUpExtendSelection",
1529 "ctrl shift PAGE_UP", "scrollLeftExtendSelection",
1530 "ctrl PAGE_UP", "scrollLeftChangeSelection",
1531 "PAGE_DOWN", "scrollDownChangeSelection",
1532 "shift PAGE_DOWN", "scrollDownExtendSelection",
1533 "ctrl shift PAGE_DOWN", "scrollRightExtendSelection",
1534 "ctrl PAGE_DOWN", "scrollRightChangeSelection",
1535 "TAB", "selectNextColumnCell",
1536 "shift TAB", "selectPreviousColumnCell",
1537 "ENTER", "selectNextRowCell",
1538 "shift ENTER", "selectPreviousRowCell",
1539 "ctrl A", "selectAll",
1540 "ctrl SLASH", "selectAll",
1541 "ctrl BACK_SLASH", "clearSelection",
1542 "ESCAPE", "cancel",
1543 "F2", "startEditing",
1544 "SPACE", "addToSelection",
1545 "ctrl SPACE", "toggleAndAnchor",
1546 "shift SPACE", "extendTo",
1547 "ctrl shift SPACE", "moveSelectionTo",
1548 "F8", "focusHeader"
1549 }),
1550 "Table.ancestorInputMap.RightToLeft",
1551 new UIDefaults.LazyInputMap(new Object[] {
1552 "RIGHT", "selectPreviousColumn",
1553 "KP_RIGHT", "selectPreviousColumn",
1554 "shift RIGHT", "selectPreviousColumnExtendSelection",
1555 "shift KP_RIGHT", "selectPreviousColumnExtendSelection",
1556 "ctrl shift RIGHT", "selectPreviousColumnExtendSelection",
1557 "ctrl shift KP_RIGHT", "selectPreviousColumnExtendSelection",
1558 "ctrl RIGHT", "selectPreviousColumnChangeLead",
1559 "ctrl KP_RIGHT", "selectPreviousColumnChangeLead",
1560 "LEFT", "selectNextColumn",
1561 "KP_LEFT", "selectNextColumn",
1562 "shift LEFT", "selectNextColumnExtendSelection",
1563 "shift KP_LEFT", "selectNextColumnExtendSelection",
1564 "ctrl shift LEFT", "selectNextColumnExtendSelection",
1565 "ctrl shift KP_LEFT", "selectNextColumnExtendSelection",
1566 "ctrl LEFT", "selectNextColumnChangeLead",
1567 "ctrl KP_LEFT", "selectNextColumnChangeLead",
1568 "ctrl PAGE_UP", "scrollRightChangeSelection",
1569 "ctrl PAGE_DOWN", "scrollLeftChangeSelection",
1570 "ctrl shift PAGE_UP", "scrollRightExtendSelection",
1571 "ctrl shift PAGE_DOWN", "scrollLeftExtendSelection",
1572 }),