Java Reference
In-Depth Information
The java.lang Package
This package provides classes that are fundamental to the design of the Java programming language.
Interface
The
Runnable
interface needs to be implemented by a class when its instances are intended for
execution by a thread.
Classes
Boolean
The
Boolean
class is a wrapper class for a value of the primitive Java data
type
boolean
.
Byte
The
Byte
class is a wrapper class for a value of the primitive Java data type
b
yte
.
Character
The
Character
class is a wrapper class for a value of the primitive Java
d
ata type
char
.
Class
The instances of the class
Class
represent Java classes and interfaces of a
r
unning Java application.
Double
The
Double
class is a wrapper class for a value of the primitive type
double
. This class is part of CLDC since version 1.1.
Float
The
Float
class is a wrapper class for a value of the primitive type
float
.
This class is part of CLDC since version 1.1.
Integer
The
Integer
class is a wrapper class for a value of the primitive Java data
type
int
.
Long
The
Long
class is a wrapper class for a value of the primitive Java data type
l
ong
.
Math
The
Math
class provides some basic mathematical operations on the Java
p
rimitive data types
int
,
long
,
float
and
double
.
Object
The
Object
class is the superclass of every Java class in a class hierarchy.
Runtime
The
Runtime
class provides every Java application with an interface for
interacting with the application environment where it is executed. Only one
instance of the Runtime class is available in a running application.
Short
The
Short
class is a wrapper class for a value of the primitive Java data
t
ype
short
.
String
The
String
class represents character-based strings.
StringBuffer
The
StringBuffer
class represents a mutable sequence of characters.
System
The
System
class provides system-related methods.
Thread
The
Thread
class represents a running thread of a Java application.
Throwable
The
Throwable
class is the superclass of every exception and error in the
J
ava language.
Exceptions
ArithmeticException
The
ArithmeticException
is thrown if an
u
nexpected arithmetic exception occurs.
ArrayOutOfBoundsException
The
ArrayOutOfBoundsException
is thrown
when an illegal index of an array is accessed.
ArrayStoreException
The
ArrayStoreException
is thrown to indicate
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