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Java Fundamentals
  • 2025年12月29日

Java Runtime Environment (JRE) Explained: What It Is, How It Works, and How to Install It

1. What Is Java Runtime (JRE)? Java Runtime Environment (JRE) is an essential component required to run Java applications. However, many people may wonder, “I’ve heard the name, but what does it actua […]

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Data Handling & Collections (Java Standard Library)
  • 2025年12月29日

Java trim() Explained: How to Remove Whitespace Safely (Including Full-Width Spaces)

1. Why Java trim() Matters and the Purpose of This Article In software development, handling “unnecessary whitespace” may seem trivial, but it is actually a critical task. In Java, the trim() method a […]

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Java Syntax Reference
  • 2025年12月29日

Java final Keyword Explained: Variables, Methods, Classes, and Best Practices

1. Introduction When developing in Java, one of the keywords you will frequently encounter is final. However, what final actually means and when it should be used is often unclear—not only for beginne […]

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Java Fundamentals
  • 2025年12月29日

Java var Explained: Local Variable Type Inference, Usage, Errors, and Best Practices

1. What You Will Learn in This Article This article provides a clear, practical explanation of local variable type inference in Java—specifically how to use the var keyword—from a real-world developme […]

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Java Fundamentals
  • 2025年12月29日

Java Print Methods Explained: print vs println vs printf with Examples

1. Introduction When writing programs in Java, one of the most frequently used operations is output. In particular, the keyword “print” is widely used by beginners and advanced developers […]

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Data Handling & Collections (Java Standard Library)
  • 2025年12月29日

Java LocalDate Explained: Complete Guide to Date Handling in Java 8 and Later

What Is LocalDate? Date handling in Java has evolved significantly since version 8. At the center of this evolution is LocalDate. LocalDate is an immutable object that represents only a date (year, mo […]

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Java Syntax Reference
  • 2025年12月29日

Java Import Statements Explained: Syntax, Best Practices, and Common Pitfalls

1. What Is a Java import Statement? Purpose and Benefits When writing Java programs, one construct you will encounter almost without exception is the import statement. Many beginners wonder, “Is impor […]

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Java Fundamentals
  • 2025年12月29日

Java PATH Setup Explained: How to Configure JAVA_HOME on Windows, macOS, and Linux

Introduction Java is a programming language used worldwide in a wide variety of systems and application development. For those who are just starting to learn Java or are setting up a new development e […]

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Data Handling & Collections (Java Standard Library)
  • 2025年12月29日

Java int and String Conversion Guide: Safe, Fast, and Best Practices

1. Introduction: Why int ⇔ String Conversion Is Essential When developing applications in Java, converting between int and String is one of the most fundamental operations you cannot avoid. For exampl […]

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Data Handling & Collections (Java Standard Library)
  • 2025年12月28日

Java Enhanced for Loop (for-each): Complete Guide with Examples, Differences, and Best Practices

1. Introduction In Java programming, situations where you need to process elements of arrays or collections sequentially are common for both beginners and experienced developers. In particular, the en […]

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