public void _insertCells(){
boolean result = false;
XSpreadsheet oSheet = (XSpreadsheet)
UnoRuntime.queryInterface(XSpreadsheet.class, oObj);
XCellRangeAddressable oAddr = (XCellRangeAddressable)
UnoRuntime.queryInterface (XCellRangeAddressable.class, oObj);
short iSheet = oAddr.getRangeAddress().Sheet;
try {
oSheet.getCellByPosition(0,20).setValue(100);
oSheet.getCellByPosition(1,20).setValue(100);
oSheet.getCellByPosition(2,20).setValue(100);
oSheet.getCellByPosition(3,20).setValue(100);