【答案】：variables of a primitive type declared是定义的原始类型的变量，是指int,long,char,boolean等原始类型，这些不是类，在.Net里叫做小整形，小长型，小字符，这些变量即使在传递的时候也是传递自己的一个复制。（最后这句看不懂没关系，看下面的你就懂了）reference variables declared 是定义...
2. Types of data type in Java Java支持两种数据类型,即primitive data type和non-primitive或reference data type 。 2.1. Primitive Data Types 基本数据类型directly在内存中保存一个值。 例如,数字或字符。 基本数据类型是 不是对象,也不是对对象的引用。 存储在原语中的值称为literals 。 literal是固定值的...
Unlike primitive data types, reference data types do not store the value directly. Example: Class and Array public class ReferenceExample { public static void main(String[] args) { String str = "Hello, World!"; // Class type int[] numbers = {1, 2, 3, 4, 5}; // Array type ...
A reference data type is used to refer to an object. A reference variable is declare to be of specific and that type can never be change. We will talk a lot more about reference data type later in Classes and Object lesson.
原始数据类型(Primitive Data Types ) 引用类型(reference type ) Java原始数据类型又称基本数据类型,它说明了在程序中所能表示的基础数据的种类,通常有8种。引用类型包括类、接口等,具体内容将在后面文章中介绍。 Java原始(基本)数据类型: boolean 布尔型, 只有真(true)与假(false) ...
对象是动态创建的类实例或者动态创建的数组。The value of reference types are references to objects,而引用一般是指内存地址。所有的对象(包括数组)支持Object类中定义的方法。String literals are presented by String object. java有两种类型(type),与之相对应的是两种数据的值(two kinds of data values that ca...
Non-primitiveor reference data type. 2.1. Primitive Data Types A primitive data typedirectlyholds a value in memory. For instance, a number or a character. Primitive data types are not objects, as well as no references to the objects. ...
Data types are divided into two groups:Primitive data types - includes byte, short, int, long, float, double, boolean and char Non-primitive data types - such as String, Arrays and Classes (you will learn more about these in a later chapter)...
Reference types Primitive types Unlimited number of reference types, as they are user-defined. Consists ofbooleanand numeric types:char, byte, short, int, long, float, anddouble. Memory location stores a reference to the data. Memory location stores actual data held by the primitive type. ...
A constant that represents a category ofLOBdata types. See Also: Constant Field Values RAW_CATEGORY public static final intRAW_CATEGORY A constant that represents a category ofRAWdata types. See Also: Constant Field Values LONG_CATEGORY