Package | Description |
---|---|
java.lang |
Contains core language classes.
|
java.lang.annotation |
Contains core language classes related to compile-time annotations.
|
java.util |
Contains utility classes including the collections framework and date manipulation.
|
Modifier and Type | Class and Description |
---|---|
class |
Boolean
The Boolean class wraps a value of the primitive type
boolean in an object. |
class |
Byte
The
Byte class wraps a value of primitive type byte in an object. |
class |
Character
The
Character class wraps a value of the primitive type char in an object. |
class |
Double
The
Double class wraps a value of the primitive type double in an object. |
class |
Enum<E extends Enum<E>>
This is the common base class of all Java language enumeration types.
|
class |
Float
The
Float class wraps a value of primitive type float in an object. |
class |
Integer
The
Integer class wraps a value of the primitive type int in an object. |
class |
Long
The
Long class wraps a value of the primitive type long in an object. |
class |
Short
The
Short class wraps a value of primitive type short in an object. |
class |
String
The
String class represents character strings. |
static class |
Thread.State
A thread state.
|
Modifier and Type | Class and Description |
---|---|
class |
ElementType
A program element type.
|
class |
RetentionPolicy
Annotation retention policy.
|
Modifier and Type | Class and Description |
---|---|
class |
Calendar
The
Calendar class is an abstract class that provides methods for converting between
a specific instant in time and a set of calendar fields such as YEAR
, MONTH , DAY_OF_MONTH , HOUR , and so on, and for
manipulating the calendar fields, such as getting the date of the next week. |
class |
Date
The class
Date represents a specific instant in time, with millisecond precision. |