Package | Description |
---|---|
java.io |
Provides classes for input and output through data streams.
|
java.lang |
Provides classes that are fundamental to the Java programming
language.
|
java.lang.ref |
Provides support for weak references.
|
java.util |
Contains the collection classes, and the date and time facilities.
|
javax.microedition.io |
Classes for the Generic Connection framework.
|
Class and Description |
---|
Exception
The class
Exception and its subclasses are a form of
Throwable that indicates conditions that a reasonable
application might want to catch. |
Object
Class
Object is the root of the class hierarchy. |
String
The
String class represents character strings. |
Throwable
The
Throwable class is the superclass of all errors
and exceptions in the Java language. |
Class and Description |
---|
Boolean
The Boolean class wraps a value of the primitive type
boolean in an object. |
Class
Instances of the class
Class represent classes and interfaces
in a running Java application. |
ClassNotFoundException
Thrown when an application tries to load in a class through its
string name using the
forName method in class Class
but no definition for the class with the specified name could be found. |
Double
The Double class wraps a value of the primitive type
double in an object. |
Error
An
Error is a subclass of Throwable
that indicates serious problems that a reasonable application
should not try to catch. |
Exception
The class
Exception and its subclasses are a form of
Throwable that indicates conditions that a reasonable
application might want to catch. |
Float
The Float class wraps a value of primitive type
float in
an object. |
IllegalAccessException
Thrown when an application tries to load in a class,
but the currently executing method does not have access to the
definition of the specified class, because the class is not public
and in another package.
|
IllegalArgumentException
Thrown to indicate that a method has been passed an illegal or
inappropriate argument.
|
IndexOutOfBoundsException
Thrown to indicate that an index of some sort (such as to an array,
to a string, or to a vector) is out of range.
|
InstantiationException
Thrown when an application tries to create an instance of a class
using the
newInstance method in class
Class , but the specified class object cannot be
instantiated because it is an interface or is an abstract class. |
Integer
The Integer class wraps a value of the primitive type
int
in an object. |
InterruptedException
Thrown when a thread is waiting, sleeping, or otherwise paused for
a long time and another thread interrupts it.
|
NumberFormatException
Thrown to indicate that the application has attempted to convert
a string to one of the numeric types, but that the string does not
have the appropriate format.
|
Object
Class
Object is the root of the class hierarchy. |
Runnable
The
Runnable interface should be implemented by any
class whose instances are intended to be executed by a thread. |
Runtime
Every Java application has a single instance of class
Runtime that allows the application to interface with
the environment in which the application is running. |
RuntimeException
RuntimeException is the superclass of those
exceptions that can be thrown during the normal operation of the
Java Virtual Machine. |
String
The
String class represents character strings. |
StringBuffer
A string buffer implements a mutable sequence of characters.
|
Thread
A thread is a thread of execution in a program.
|
Throwable
The
Throwable class is the superclass of all errors
and exceptions in the Java language. |
VirtualMachineError
Thrown to indicate that the Java Virtual Machine is broken or has
run out of resources necessary for it to continue operating.
|
Class and Description |
---|
Object
Class
Object is the root of the class hierarchy. |
Class and Description |
---|
Exception
The class
Exception and its subclasses are a form of
Throwable that indicates conditions that a reasonable
application might want to catch. |
Object
Class
Object is the root of the class hierarchy. |
RuntimeException
RuntimeException is the superclass of those
exceptions that can be thrown during the normal operation of the
Java Virtual Machine. |
String
The
String class represents character strings. |
Throwable
The
Throwable class is the superclass of all errors
and exceptions in the Java language. |
Class and Description |
---|
Exception
The class
Exception and its subclasses are a form of
Throwable that indicates conditions that a reasonable
application might want to catch. |
Object
Class
Object is the root of the class hierarchy. |
String
The
String class represents character strings. |
Throwable
The
Throwable class is the superclass of all errors
and exceptions in the Java language. |
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