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  1. Java provides eight primitive data types that serve as the building blocks for data manipulation. These types are predefined by the language and are not objects, making them efficient for memory and performance.

    1. boolean

    • Represents a value of either true or false.

    • Default value: false.

    • Example:

    boolean isActive = true;
    System.out.println(isActive); // Output: true
    コピーしました。

    2. byte

    • An 8-bit signed integer with a range of -128 to 127.

    • Useful for saving memory in large arrays.

    • Default value: 0.

    • Example:

    byte smallNumber = 100;
    System.out.println(smallNumber); // Output: 100
    コピーしました。

    3. short

    • A 16-bit signed integer with a range of -32,768 to 32,767.

    • Used when memory savings are important, but byte is too small.

    • Default value: 0.

    • Example:

    short temperature = -200;
    System.out.println(temperature); // Output: -200
    コピーしました。

    4. int

    • A 32-bit signed integer with a range of -2,147,483,648 to 2,147,483,647.

    • Default value: 0.

    • Example:

    int population = 1000000;
    System.out.println(population); // Output: 1000000
    コピーしました。

    5. long

  1. Java Data Types - GeeksforGeeks

    2 日前 · Primitive data types store simple values directly in memory. Java provides eight primitive data types, each with a fixed size and range, which are summarized below:

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