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title: "Discussion on \"📦 Installing Oracle XE and Connecting with SQL Developer: From Download to Troubleshooting\" | Hashnode"
description: "Discussion on \"📦 Installing Oracle XE and Connecting with SQL Developer: From Download to Troubleshooting\". Install Oracle XE, connect via SQL Developer, and fix errors like ORA-12541. Troubleshoot connection issues effectively"
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# [📦 Installing Oracle XE and Connecting with SQL Developer: From Download to Troubleshooting](https://johnnyhideki.hashnode.dev/installing-oracle-xe-and-connecting-with-sql-developer-from-download-to-troubleshooting?utm_source=hashnode&utm_medium=feed)

Install Oracle XE, connect via SQL Developer, and fix errors like ORA-12541. Troubleshoot connection issues effectively

Jun 30, 2025 · 4 min read · johnnyhideki.hashnode.dev  
Updated Jul 4, 2025  
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## Written by

[Johnny Hideki Kinoshita de Faria](https://hashnode.com/@johnnyhideki)

@johnnyhideki · Maringa, Parana, Brazil

  
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johnnyhideki

Technology Professional with experience since 2008 across healthcare, education, and predominantly financial services. Strong expertise in Oracle PL/SQL, specializing in business-rule-driven development, data modeling, query optimization, performance tuning, and database migration projects. Skilled in SQL Server, PostgreSQL, and MySQL, delivering scalable and adaptable data solutions. Experienced Java developer focused on designing high-performance RESTful APIs using Layered Architecture and industry best practices, including DTO, Service, Repository, and Mapper patterns. Solid background in automated testing with JUnit and Mockito, ensuring software quality and reliability. Holds a postgraduate degree in .NET Platform Architecture, applying TDD, Clean Code principles, and coding standards to build maintainable enterprise applications. Additional experience with PHP and JavaScript for full-stack web development.

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