リンクを新しいタブで開く
  1. In Java, keywords are reserved words with predefined meanings recognized by the compiler. They cannot be used as identifiers (variable names, method names, class names, etc.) and are case-sensitive. As of Java 21, there are 53 keywords grouped by their purpose.

    Example Demonstration:

    class Demo {
    public static void main(String[] args) {
    // Using 'final' and 'int'
    final int x = 10;

    // Using 'if' and 'else'
    if (x > 10) {
    System.out.println("Condition met");
    } else {
    System.out.println("Successful demonstration of keywords.");
    }
    }
    }
    コピーしました。

    Output:

    Successful demonstration of keywords
    コピーしました。

    Key Categories and Examples:

    • Data Type Keywords – Define variable types. Example:

    int age = 25; // 32-bit signed integer
    boolean isActive = true; // true/false value
    コピーしました。
    • Control Flow Keywords – Manage execution flow. Example:

    for (int i = 0; i < 3; i++) {
    if (i == 1) continue; // skip iteration
    System.out.println(i);
    }
    コピーしました。
    • Exception Handling Keywords – Handle runtime errors. Example:

    try {
    int result = 10 / 0;
    } catch (ArithmeticException e) {
    System.out.println("Cannot divide by zero");
    } finally {
    System.out.println("Cleanup code");
    }
    コピーしました。
  1. To All Java Keywords の検索結果を含めています。
    Total Java Key Words の検索結果のみを表示しますか?
  2. Java Keywords - GeeksforGeeks

    2025年12月4日 · In Java, keywords are the reserved words that have some predefined meanings and are used by the Java compiler for some internal process or represent some predefined actions. These …

  3. Java Language Keywords (The Java™ Tutorials > Learning the Java ...

    See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. See JDK Release Notes for information about new features, enhancements, and removed or …

  4. 他の人も質問しています
  5. Java Keywords - W3Schools

    Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

  6. List of Java keywords - Wikipedia

    In the Java programming language, a keyword is any one of 68 reserved words [1] that have a predefined meaning in the language. Because of this, programmers cannot use keywords in some contexts, such …

  7. Java Keywords – 68 Java Keywords Explained - igmguru.com

    2025年12月30日 · Java Keywords are 68 reserved words that have predefined meanings and cannot be used for variables, methods, or identifiers. Learn them all with this comprehensive guide.

  8. Java Keywords: Full List With Examples (2026)

    2025年12月15日 · Learn what keywords are in Java, explore the complete list of Java keywords, and discover best practices for using them with examples. Read now!

  9. Summary of all Java keywords with code examples

    2024年3月9日 · This article gives you an overview of all keywords in the Java programming language with explanation and code examples (updated to Java 14). Understand the meaning of each Java …

  10. Keywords in Java - Topperworld

    You cannot use keywords like int, for, class, etc as variable name (or identifiers) as they are part of the Java programming language syntax. Java has a total of 50 keywords, which are used to define the …

  11. Introduction to Java | Java Development Kit (JDK) and Java Runtime ...

    2025年9月7日 · What are Keywords in Java? A keyword is a word that is reserved by Java because it has a special function in the language. Java has a total of 53 keywords (as of Java SE 17), and they …

  12. Java Keywords Cheat Sheet

    This cheat sheet provides a comprehensive reference to all the Java keywords, helping you understand their usage and enhance your programming skills. Keep this guide handy to ensure you are using …

  13. total java keywords について掘り下げる

  14. To All Java Keywords の検索結果を含めています。
    Total Java Key Words の検索結果のみを表示しますか?