SELECT * "
+ "FROM Table1 "
+ "WHERE Username = ? "
+ "AND Password = ?;");

PreparedStatement.setString(1, "Albert");
PreparedStatement.setString(2, "123"); OR USING VARIABLES

SELECT * "
+ "FROM ? "
+ "WHERE Username = ? "
+ "AND Password = ?;");

myPreStatement.setString(1, "Table1");
myPreStatement.setString(2, "Albert");
myPreStatement.setString(3, "123"); OR USING VARIABLES