Java basic data types and encapsulation classes

1 Boolean vs Boolean

Public final classBoolean

Extends object

Implements serializable, comparable <Boolean>

The basic type of the Boolean class isBooleanThe value is packaged in an object. OneBooleanType objects only contain one typeBoolean.

In additionBooleanAndStringProvides many methods for mutual conversion and provides ProcessingBooleanOther constants and methods that are very useful.

2 byte vs byte

Public final classByte

Extends number

Implements comparable <byte>

ByteClass will be the basic typeByteThe value is packaged in an object. OneByteType objects only contain one typeByte.

In addition, this class isByteAndStringProvides several methods for mutual conversion and processing.ByteOther constants and methods that are very useful.

 

3 character vs char

Public final classCharacter

Extends object

Implements serializable, comparable <character>

CharacterClass encapsulates a basic type in the objectChar.CharacterThe type object containsChar.

In addition, this class provides several methods to determine the character category (lowercase letters, numbers, and so on), convert the characters from uppercase to lowercase, and vice versa.

4 double vs double

Public final classDouble

Extends number

Implements comparable <double>

DoubleClass encapsulates a basic type in the objectDouble. EachDoubleAll types of objects containDoubleType field.

This class also provides multiple methodsDoubleConvertString, SetStringConvertDoubleAnd provides other processing functions.DoubleUseful constants and methods.

5 float vs float

Public final classFloat

Extends number

Implements comparable <float>

FloatClass encapsulatesFloatValue of the basic type.FloatType object containsFloatType field.

In addition, this class provides several methodsFloatType andStringType conversion and ProcessingFloatType.

6 integer vs int

Public final classInteger

Extends number

Implements comparable <integer>

IntegerClass encapsulates a basic type in the objectInt.IntegerType object containsIntType field.

In addition, this class provides multiple methodsIntType andStringData types are converted to each other, and processing is also provided.IntType.

7 long vs long

Public final classLong

Extends number

Implements comparable <long>

LongClasses encapsulate basic types in objectsLong. EachLongAll types of objects containLongType field.

In addition, this class provides multiple methodsLongConvertString, SetStringConvertLongIn addition, some other processing functions are provided.LongUseful constants and methods.

8. Short vs short

Public final classShort

Extends number

Implements comparable <short>

ShortClass to wrap basic types in objectsShort. OneShortType object only contains oneShortType field.

In addition, this class provides multiple methodsShortConvertString, SetStringConvertShortAnd provides other processing functions.ShortUseful constants and methods.

9

Public final classVoid

Extends object

The void class is a placeholder class that cannot be instantiated. It maintains a reference to the class object that represents the Java keyword void.