source files folder path: ./ task / src / banking /

1. Card anatomy
2. Luhn algorithm
3. I'm so lite
4. Advanced system
5. Remarks

Stage description on JetBrains Academy site or locally

Stage start date: 2020-06-06

• be familiar with bank card numbering system
  CS/IT concepts used:
  • requirements analysis, picking up relevant information from the description received,
  • choosing the right data type for the modeled slice of reality - eg.: card number: integer vs real vs string,
• generate unique bank card numbers
  CS/IT concepts used:
  • random number generator,
  • the set data type,
  • extracting logical parts from the string representing full card number (issuer ID, user ID, check digit),
  • composing string representing the full card number from individual parts,
• keep records about issued card's data: number, pin, balance
  CS/IT concepts used:
  • the map data type,
• wait for user input, process the option he/she chooses
  CS/IT concepts used:
  • main application loop
  • finite automata basics - state of the application

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Stage description on JetBrains Academy site or locally

Stage start date: 2020-06-07

• to be familiar with 'Luhn formula' - card number checking algorithm
• check digit generation
• checking the correctness of the given card number according to the Luhn formula and the check digit provided

CS/IT concepts used (common for all above-mentioned topics):

• Java 8 streams - processing IntStream based on string representing full card number - series of digits
• generating / checking the remainder of division as a check digit

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Stage description on JetBrains Academy site or locally

Stage start date: 2020-06-09

• ensuring the persistence of accumulated data

CS/IT concepts to use:

• CLI parameters utilization - eg. providing SQLite DB file name ,
• utilizing 'singleton' design pattern - for new 'AccDataBase' class and for the 'Log' class refactored from single variable,
• working with SQLite DB,
• basic concepts of JPA (Java Persistent API): data source, connection, SQL statement, prepared SQL statement, etc.,
• basic of DDL (Data Definition Language): create DB / create table, drop db, drop table,
• some of basic SQL CRUD operations:
  • select ... from ... where ... ,
  • insert into ... values ...,

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Stage description on JetBrains Academy site or locally

Stage start date: 2020-06-15

• add more bank account-related operations:
  • add income,
  • do transfer (to another account),
  • close account,

CS/IT concepts to use:

• update ... set ...,
• delete from ... where ...,

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This project has been included in the version control system (git) and published on GitHub just after stage #2 completion

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