【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
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.
Reference/Object Data Types 1.1 8种基本数据类型 byte Byte data type is an 8-bit signed two's complement integer (two's complement integer 二进制补码) short Short data type is a 16-bit signed two's complement integer int Int data type is a 32-bit signed two's complement integer. ...
There are eight primitive data types in Java: Data TypeDescription byteStores whole numbers from -128 to 127 shortStores whole numbers from -32,768 to 32,767 intStores whole numbers from -2,147,483,648 to 2,147,483,647 longStores whole numbers from -9,223,372,036,854,775,808 to 9,...
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. ...
java reference是什么 java typereference 在java源代码中,每个变量都必须声明一种类型(type)。有两种类型:primitive type和reference type。引用类型引用对象(reference to object),而基本类型直接包含值(directly contain value)。因此,Java数据类型(type)可以分为两大类:基本类型(primitive types)和引用类型(reference ...
Reference types compared to primitive types Reference types Primitive types Unlimited number of reference types, as they are user-defined. Consists of boolean and numeric types: char, byte, short, int, long, float, and double. Memory location stores a reference to the data. Memory location ...
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