johnivo/job4j

John Ivanov. Java internship repository. Mentor Petr Arsentev and team Job4j.

Here are some interesting tasks:

• XML XSLT JDBC Parsing and converting.

• Simple interactive calculator.

• Web forum cron parser with PostgreSQL.

• Statistics on the collection.

• Simple HashMap implementation.

• Simple console zip-archiver of files by extension in specified folder.

Content:

chapter_001. Basic syntax Java: conditionals, cycles, primitive types, arrays.

chapter_002. OOP: inheritance, encapsulation, polymorphism, inner classes, abstract and anonymous classes, interfaces, basic design patterns, exceptions.

chapter_003. Collections. Lite: lists, maps, sorting, generics.

chapter_004. FP: lambdas, stream api, JDK 1.9, 1.10, 1.11 innovations.

chapter_005. Collections. Pro: advanced lists and maps, trees, hashcode and equals, iterators, generics pro.

chapter_006. IO: readers, writers, sockets, file managers, external file sorting.

chapter_007. SQL, JDBC: postgresql, sqlite.

chapter_008. OOD: SOLID, TDD. Contains several interesting tasks: Interactive calculator, Product warehouse, Structure to maintain menu, SimpleGenerator.

chapter_009. Garbage Collection: types of GC, types of references.

chapter_010. Multithreading: threads, concurrency, synchronize, monitor, deadlock, non blocking algorithm, producer-consumer pattern, locks, thread pools.

chapter_011. Servlet, JSP: servlets, jsp, web app, crud, filters, security, mockito, html, ajax, css.

interview questions. Questions and answers for interviews on Job4j topics.