#java Development Tutorials & Tips | Roast Dev

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Day-1 🌟 Understanding Java Statements: Normal, Conditional, and Control Statements

🧱 1. Normal StatementsA normal statement is any line of code that executes in a straightforward, sequential manner. These are the basic building blocks of a Java program. ✍️ Example:int a = 10;...

04.04.2025 0 Read More

Day 4 I have revised some of oracle concepts

Hi Everyone Today I have revised some of the topics in oracle like cross join ,set operators like union, union all, intersect, minus I would like to define them in simple words unio means that combi...

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𝗠𝗮𝘀𝘁𝗲𝗿𝗶𝗻𝗴 𝘁𝗵𝗲 𝗙𝗮𝗰𝘁𝗼𝗿𝘆 𝗣𝗮𝘁𝘁𝗲𝗿𝗻: 𝗔 𝗞𝗲𝘆 𝘁𝗼 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗮𝗻𝗱 𝗠𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝗖𝗼𝗱𝗲

In the ever-evolving world of software development, designing scalable and maintainable applications is a constant challenge. One of the most powerful design patterns that can help us achieve this is ...

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100 imp interview questions for Java developers

Core Java What is the difference between == and .equals() in Java? Explain the concept of immutability in Java. What is the purpose of the final keyword in Java? How does Java achieve platfo...

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Spring Boot 3 + Hibernate: Logando undefined/unknown

A partir de uma certa versão do Spring Boot 3, utilizando JPA o Hibernate adicionou os seguintes log's: ⛶org.hibernate.orm.connections.pooling : HHH10001005: Database info: Database JDBC URL...

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Por que seu `parallelStream()` pode estar mentindo (e como corrigir)

Quando usamos .parallelStream() no Java, esperamos que tudo rode em paralelo — rápido, eficiente, multicore. Mas às vezes, mesmo usando .parallelStream(), tudo roda em uma única thread. Cadê o p...

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Spring & Validations: Supporting Both Infrastructure and Business Logic

Where to put validation rules, how to preserve domain purity, and how Spring helps enforce both technical and business constraints. As stated in Spring’s documentation: "There are pros and...

05.04.2025 0 Read More

9.3 Executando o pipeline em paralelo

Streams em Java executam por padrão de forma sequencial. Com muitos dados (ex: milhões de usuários), o processamento sequencial pode ser lento. Para paralelizar esse processo, podemos usar: parall...

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9.4 Operações não determinísticas e ordered streams

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🤔 `spring.kafka.consumer.fetch-min-size` Not Applying? Let’s Talk About It.

So you’re building a Spring Boot Kafka consumer, tweaking those sweet application.properties, and then you drop this gem: ⛶spring.kafka.consumer.fetch-min-size=524288000You’re expecting Kafka to...

05.04.2025 0 Read More

Day-1 🌟 Understanding Java Statements: Normal, Conditional, and Control Statements

Day 4 I have revised some of oracle concepts

𝗠𝗮𝘀𝘁𝗲𝗿𝗶𝗻𝗴 𝘁𝗵𝗲 𝗙𝗮𝗰𝘁𝗼𝗿𝘆 𝗣𝗮𝘁𝘁𝗲𝗿𝗻: 𝗔 𝗞𝗲𝘆 𝘁𝗼 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗮𝗻𝗱 𝗠𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝗖𝗼𝗱𝗲

100 imp interview questions for Java developers

Spring Boot 3 + Hibernate: Logando undefined/unknown

Por que seu `parallelStream()` pode estar mentindo (e como corrigir)

Spring & Validations: Supporting Both Infrastructure and Business Logic

9.3 Executando o pipeline em paralelo

9.4 Operações não determinísticas e ordered streams

🤔 `spring.kafka.consumer.fetch-min-size` Not Applying? Let’s Talk About It.

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