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Cardano-Java: Unleashing Open Source Innovation in Blockchain
- Cardano-Java is a Java client for the Cardano blockchain, emphasizing open source innovation and community involvement.
- With a focus on technical architecture, ecosystem integration, and funding strategies, Cardano-Java shows promise in the blockchain landscape.
- Rooted in decades of research, Cardano-Java embraces MIT licensing, community contributions, and ecosystem integration.
- The technical architecture of Cardano-Java prioritizes modularity, security, and scalable design for seamless integration with blockchain networks.
- Funding models for Cardano-Java include crowdfunding, corporate sponsorship, grant funding, and potential tokenization strategies.
- The dynamic developer ecosystem of Cardano-Java thrives on forums, workshops, and collaborative governance to drive innovation.
- Applications of Cardano-Java span decentralized finance (DeFi) and enterprise-grade dApps, focusing on security and cross-chain capabilities.
- Challenges for Cardano-Java include scalability, security, market penetration, community coordination, and funding volatility.
- Future outlook for Cardano-Java includes enhanced cross-chain solutions, improved developer tools, decentralized governance, and ecosystem collaborations.
- Cardano-Java sets industry benchmarks by combining technical excellence, innovative funding, community power, and future prospects for blockchain innovation.
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Dev
1M
86
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How to Permanently Delete Rows in Excel Using Java?
- This article guides Java developers on permanently deleting rows in Excel based on specific criteria like 'Not Valid' or 'Not Applicable'.
- Steps include setting up Apache POI dependencies in the project and using Java code to identify and remove unwanted rows.
- Key points in the code involve looping backwards, checking cell values, and using sheet.removeRow(row) for permanent deletion.
- Developers are advised to keep backups before batch deletions, as deleted rows cannot be undone once the workbook is saved.
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Medium
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262
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Java 17 The Enterprise Standard for Tomorrow
- Java 17, released in 2021, introduces features like production-ready records, sealed classes, pattern matching, and full container awareness.
- Modern technologies now require Java 17 as the baseline for development, with major frameworks and tools mandating its use.
- Enhancements in Java 17 cater to cleaner code, enhanced performance, improved security, and capabilities for developing reliable microservices.
- Key features like Ultra-Low Latency Garbage Collection, Container-Aware JVM, Class Data Sharing, and Built-in Observability enhance Java 17's reliability and performance.
- Java 17 features a modern HTTP Client API, Immutable Collection Factories, Records, Sealed Classes, and Pattern Matching for cleaner and more efficient code.
- Security enhancements in Java 17 include TLS 1.3 enabled by default, stronger encapsulation, and improved security measures over Java 8.
- Java 17's Vector API enables explicit SIMD programming for compute-intensive tasks, Long-Term Support, and improved security with Premier and Extended Support.
- Organizations are gradually transitioning to newer LTS versions like Java 11 and 17, with Java 8 still prevalent but declining.
- The adoption rate of Java 21 is increasing, indicating a trend towards quicker adoption of new features and upgrades.
- Java 17's enhancements set the stage for more advanced future releases, encouraging the development of secure, optimized, and innovative applications.
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15 Likes
Medium
1M
267
Java: The Legacy That Keeps Slowing Us Down
- Java arrived in the 1990s with a promise of 'Write once, run anywhere' but has now become a legacy slowing down modern development.
- In its early days, Java provided safety, structure, and portability, making it popular for enterprise computing and web applications.
- However, Java's verbosity and legacy codebase are now seen as hindrances to efficient and agile development.
- The challenge for Java moving forward is to balance its established ecosystem with the need to adapt to modern development practices.
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Dev
1M
231
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How to Connect Spark to MinIO Using S3A in Java?
- Many developers face challenges connecting Apache Spark to MinIO using the S3A file system.
- Proper configurations and dependencies like 'hadoop-aws' and 'software.amazon.awssdk' are required for seamless operation.
- The Java code example provided demonstrates how to configure Spark to connect to MinIO instance.
- Key configuration parameters like endpoint URL, access and secret keys, and SSL settings need to be set correctly for successful connectivity.
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13 Likes
Medium
1M
322
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The Meaning of Volatile Variables in the Java Memory Model
- In Java, each thread has its own working memory, which can cause discrepancies when sharing variables across threads.
- Without the 'volatile' keyword, threads may not see the most recent value of a shared variable due to caching.
- Using 'volatile' ensures that every read and write operation on a variable is visible to all threads.
- Volatile fields in Java help in synchronizing the visibility of shared variables across threads.
- Volatile doesn't provide atomicity; it only guarantees the visibility of the most recent value.
- Volatile is useful for simple communication between threads, such as signaling the status.
- Memory barriers are introduced by the JVM when dealing with volatile variables to control memory reads and writes.
- Volatile alone is not sufficient for complex operations that require atomicity; atomic classes or locks are needed.
- For scenarios where the whole process from read to write needs to be uninterrupted, volatile is not suitable.
- In cases where atomicity is crucial, such as incrementing shared variables safely, volatile is not the appropriate solution.
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Infoq
1M
9
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JBang Jash Brings Streamlined Process Execution to Java
- JBang Jash, introduced by the JBang team, is a Java library that simplifies the execution of external processes and shell commands through a fluent and predictable API.
- It aims to address complexities faced by developers when using standard Java APIs for process execution, providing chainable process execution, automatic input/output stream handling, and customizable handling of non-zero exit codes.
- JBang Jash also supports piping commands in a pipeline, detects the appropriate shell environment, and offers an intuitive interface for working with shell processes and streams in Java 17+.
- The project, originally named 'fluent-process' by OnGres, Inc. in 2020, was forked and renamed to 'jash' in 2025 to provide a more idiomatic Java interface for shell processes. Jash can be integrated into any Java project without the need for the JBang CLI tool.
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The Register
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281
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Users advised to review Oracle Java use as Big Red's year end approaches
- Oracle Java audits are increasing as the tech giant approaches its year end, following a switch to a per-employee license model that can lead to costs growing up to five times.
- Oracle introduced a paid subscription for Java in September 2018, and in January 2023 switched its pricing model to per employee, resulting in significant price increases for customers.
- Gartner reported price increases of two to five times under the new licensing model, with Oracle initiating more audits globally, especially at the end of its financial year.
- Experts recommend considering alternatives to Oracle Java to avoid the licensing problem, and negotiating with Oracle for favorable terms if sticking with the per-user license model.
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Medium
1M
18
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Best Java trainning institute in Pitampura, Rohini
- Comprehensive Curriculum: The institute offers a meticulously designed curriculum that caters to beginners and experienced programmers alike, covering basic syntax to advanced Java programming techniques.
- Expert Faculty: Students learn from experienced and passionate faculty members who bring real-world experience to the classroom, providing up-to-date knowledge and mentoring throughout the learning journey.
- Hands-On Experience: The courses focus on practical exercises and real-world projects to enhance problem-solving skills and prepare students for job responsibilities, promoting learning by doing.
- Industry-Recognized Certification: Upon completion, students receive an industry-recognized certification that validates their skills, boosts career prospects, and demonstrates quality education and practical experience to employers.
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Javacodegeeks
1M
403
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Fixing Java DateTimeParseException with LocalDateTime
- When working with Java’s java.time package, encountering DateTimeParseException with the message: "Unable to obtain LocalDateTime from TemporalAccessor" is common.
- Root Cause: Missing Time Component - The exception often occurs when trying to parse a date-only string into a LocalDateTime, which requires both date and time components.
- Resolution: Use LocalDate Instead - Switching to LocalDate when the input string contains only a date ensures successful parsing.
- Using LocalDate.parse() with a Built-in Formatter simplifies the parsing process for date-only strings by utilizing DateTimeFormatter.ISO_LOCAL_DATE.
- For LocalDateTime parsing, DateTimeFormatter.ISO_LOCAL_DATE_TIME is suitable for strings containing both date and time components in ISO-8601 format.
- Appending Default Time If Missing - Solutions include using .atStartOfDay() when converting from LocalDate to LocalDateTime or manually appending a default time.
- Final Tips to Prevent the Exception: Use .atStartOfDay(), match formatters, choose the correct date-time type, and utilize DateTimeFormatter.ISO_LOCAL_DATE for robust parsing.
- In Conclusion, understanding the causes and remedies for DateTimeParseException related to LocalDateTime in Java is crucial to handling date-time parsing effectively.
- The article provides code examples and tips to address and prevent the exception, emphasizing the importance of proper date-time handling.
- Developing proficiency in Java date-time operations and error handling can enhance one's Java programming skills significantly.
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24 Likes
TechBullion
1M
178
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Building Better Systems: A Practical Look at Scalable Java Design Patterns
- Nagaraju Vedicherla provides insights on how Java/J2EE design patterns address complexities in scalable enterprise systems.
- Design patterns play a crucial role in maintaining, scaling, and reducing costs of enterprise software, ensuring operational flexibility and consistency.
- Key design patterns in modern enterprise Java applications include Model View Controller, Singleton, Data Access Object, Factory patterns, and microservices architecture.
- Design patterns not only improve application resilience and adaptability but also offer performance optimizations such as lazy initialization, caching, load balancing, and memory management strategies.
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10 Likes
Medium
1M
90
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Exception Handling: From Java Basics to Implementation in Spring Boot — Part I
- Exception handling in Java involves understanding the basics of exceptions, their hierarchy, and how to handle them effectively.
- Exceptions are deviations from expected rules or instructions and signal when something goes wrong during application execution.
- Java's exception hierarchy starts with Throwable, branching into Exception and Error, with subclasses inheriting attributes and methods.
- Checked exceptions must be declared or handled, while unchecked exceptions are optional to manage.
- Catching specific exceptions is best practice for code quality, as handling generic exceptions is discouraged.
- Exception handling methods include try-catch blocks to handle potential errors and throws declarations to specify potential exceptions.
- Centralizing exception handling in Spring Boot is preferable for code cleanliness, scalability, and easier maintenance.
- Using the throw statement allows explicit throwing of exceptions, enabling customized error messages and handling.
- Creating custom exceptions by extending existing classes like Exception or RuntimeException provides better control in error messaging and handling.
- Understanding how to handle, declare, and throw exceptions is essential for effective error management in Java programming.
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Dev
1M
390
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Why is My Block Movement Intermittent in Java Swing?
- Java Swing applications may face intermittent block movement due to issues with key event handling and focus management.
- Common pitfalls include problems with Window Focus, KeyListener Implementation, and Game Refresh Rate.
- To fix key input issues, ensure JPanel has focus, improve KeyListener logic, and optimize the game loop for more responsive handling.
- By following the recommended solutions, such as requesting focus for JPanel, correctly tracking key presses, and adjusting the game loop, developers can address block movement inconsistencies in Java Swing applications.
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23 Likes
Dev
1M
413
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How to Convert String Time to Timestamp in Java for MySQL?
- To convert a time format string into a Timestamp in Java for MySQL, follow these steps:
- Step 1: Import necessary packages including SQL-related classes and time formatting utilities.
- Step 2: Convert the string time to a LocalTime object using DateTimeFormatter.
- Step 3: Convert the LocalTime object to a Timestamp by providing a date (which can be arbitrary) and ignore its importance in the outcome.
- Step 4: Insert the Timestamp data into your MySQL database table using JDBC to ensure proper database operations.
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24 Likes
Medium
1M
90
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I Got My First Backend Job with Java — Here’s What I Wish I Knew
- Lessons learned by a new backend developer working with Java.
- Mastering Java's syntax is not enough, understanding its ecosystem and philosophy is crucial for backend development.
- Java is robust, enterprise-grade language designed for scalability, reliability, and maintainability.
- Building systems with Java requires handling real-world complexity.
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