Java + SQL Foundations (Enterprise Patterns)

Reference implementations for Java and SQL patterns commonly used in enterprise systems.

What’s inside

• Java

  • fundamentals (types, control flow, methods)
  • collections (List/Map/Set patterns)
  • JDBC examples using prepared statements and try-with-resources

• SQL

  • DDL: tables, constraints
  • Queries: joins, aggregates, subqueries
  • Transactions: isolation + locking notes

How to run (Java)

Use Java 17+.

Compile/run a single file:

javac java/basics/HelloWorld.java
java -cp java/basics HelloWorld