What is the default value of byte data type in Java?

Asked By: Bharti Black | Last Updated: 18th March, 2020
Category: technology and computing programming languages
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Default Value of Data Types in Java :
Data Type Default Value (for fields)
byte 0
short 0
int 0
long 0L

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Also know, what is the default data type?

Certain columns and data types have predefined or assigned default values. For example, default column values for the various data types are as follows: NULL. 0 Used for small integer, integer, decimal, single-precision floating point, double-precision floating point, and decimal floating point data type.

Subsequently, question is, what is the default value of an object in Java? Default values are same as instance variables. For numbers, the default value is 0; for Booleans, it is false; and for object references, it is null. Values can be assigned during the declaration or within the constructor.

Also, what are the default values of Java primitive data types?

In Java, the default value of any primitive is the 'zero' equivalent of that primitive. int,float,double are 0, char is u0000, boolean is false. Since primitives are not actually objects on their face in Java, then they must be initialized by default because, semantically, they can never be null.

What is byte data type in Java?

byte: The byte data type is an 8-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive). The byte data type can be useful for saving memory in large arrays, where the memory savings actually matters.

39 Related Question Answers Found

What do u mean by variable?

In programming, a variable is a value that can change, depending on conditions or on information passed to the program. Typically, a program consists of instruction s that tell the computer what to do and data that the program uses when it is running.

What is a default value?

Default values, in the context of databases, are preset values defined for a column type. Default values are used when many records hold similar data.

What is long data type?

Long. Long is a data type used in programming languages, such as Java, C++, and C#. A constant or variable defined as long can store a single 64-bit signed integer. Because the long data type is signed, the possible integers range from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807, including 0.

What do u mean by data type?

In computer science and computer programming, a data type or simply type is an attribute of data which tells the compiler or interpreter how the programmer intends to use the data. This data type defines the operations that can be done on the data, the meaning of the data, and the way values of that type can be stored.

What are the 8 data types in Java?

Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double .

What are the data types in Java?

There are two types of data types in Java:
  • Primitive data types: The primitive data types include boolean, char, byte, short, int, long, float and double.
  • Non-primitive data types: The non-primitive data types include Classes, Interfaces, and Arrays.

What is default data type in C?

Data Types in C. char: The most basic data type in C. It stores a single character and requires a single byte of memory in almost all compilers. int: As the name suggests, an int variable is used to store an integer. float: It is used to store decimal numbers (numbers with floating point value) with single precision.

What is float in Java?

Floating-point numbers are numbers that have fractional parts (usually expressed with a decimal point). You should use a floating-point type in Java programs whenever you need a number with a decimal, such as 19.95 or 3.1415. Java has two primitive types for floating-point numbers: float: Uses 4 bytes.

What is the size of Boolean variable?

A Boolean has 8 bytes of header, plus 1 byte of payload, for a total of 9 bytes of information. The JVM then rounds it up to the next multiple of 8.

What is a byte data type?

Byte data type is an 8-bit signed two's complement integer. Minimum value is -128 (-2^7) Maximum value is 127 (inclusive)(2^7 -1) Default value is 0. Byte data type is used to save space in large arrays, mainly in place of integers, since a byte is four times smaller than an integer.

What is the range of char data type in Java?

It represents a Unicode character. Note that char is an unsigned data type. Therefore, a char variable cannot have a negative value. The range of the char data type is 0 to 65535, which is the same as the range of the Unicode set.

What is the largest data type in Java?

The largest integer number that a long type can represent is 9223372036854775807. If we deal with even larger numbers, we have to use the java. math.

Type Size Range
short 16 bits -32,768 to 32,767
char 16 bits 0 to 65,535
int 32 bits -2,147,483,648 to 2,147,483,647

What is the range of long data type in Java?

Java Eight Primitive Data Types
Type Size in Bytes Range
byte 1 byte -128 to 127
short 2 bytes -32,768 to 32,767
int 4 bytes -2,147,483,648 to 2,147,483, 647
long 8 bytes -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

What is string in Java?

String is a sequence of characters, for e.g. “Hello” is a string of 5 characters. In java, string is an immutable object which means it is constant and can cannot be changed once it has been created.

What is Unicode in Java?

Unicode System in java. Unicode is a universal international standard character encoding that is capable of representing most of the world's written languages. Unicode is a standard designed to consistently and uniquely encode characters used in written languages throughout the world.

What is the range of double in Java?

The range of double in Java is 1.7976931348623157 x 10^308 to 4.9406564584124654 x 10^-324.