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Java powers data systems at companies worldwide, making it essential for data engineers working with enterprise applications. This track prepares you to build and maintain these systems from the ground up. You'll start with Java fundamentals and progress through object-oriented programming, file handling, and data import techniques using industry tools like Tablesaw. Learn to integrate with PostgreSQL databases using JDBC, implement secure parameterized queries, and handle batch operations. Complete the track by mastering data cleaning workflows and code optimization techniques that keep your applications fast and reliable.