See: Description
| Interface | Description |
|---|---|
| Comparable |
This interface imposes a total ordering on the objects of each class that
implements it.
|
| Runnable |
The
Runnable interface should be implemented by any
class whose instances are intended to be executed by a thread. |
| Class | Description |
|---|---|
| Boolean |
The Boolean class wraps a value of the primitive type
boolean in an object. |
| Byte |
The Byte class is the standard wrapper for byte values.
|
| Character |
The Character class wraps a value of the primitive type
char
in an object. |
| Class |
Instances of the class
Class represent classes and interfaces
in a running Java application. |
| Double |
The Double class wraps a value of the primitive type
double in an object. |
| Float |
The Float class wraps a value of primitive type
float in
an object. |
| Integer |
The Integer class wraps a value of the primitive type
int
in an object. |
| Long |
The Long class wraps a value of the primitive type
long
in an object. |
| Math |
The class
Math contains methods for performing basic
numeric operations. |
| Object |
Class
Object is the root of the class hierarchy. |
| 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. |
| RuntimePermission |
This class is for runtime permissions.
|
| Short |
The Short class is the standard wrapper for short values.
|
| String |
The
String class represents character strings. |
| StringBuffer |
A string buffer implements a mutable sequence of characters.
|
| System |
The
System class contains several useful class fields
and methods. |
| 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. |
| Exception | Description |
|---|---|
| ArithmeticException |
Thrown when an exceptional arithmetic condition has occurred.
|
| ArrayIndexOutOfBoundsException |
Thrown to indicate that an array has been accessed with an
illegal index.
|
| ArrayStoreException |
Thrown to indicate that an attempt has been made to store the
wrong type of object into an array of objects.
|
| ClassCastException |
Thrown to indicate that the code has attempted to cast an object
to a subclass of which it is not an instance.
|
| 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. |
| Exception |
The class
Exception and its subclasses are a form of
Throwable that indicates conditions that a reasonable
application might want to catch. |
| 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.
|
| IllegalMonitorStateException |
Thrown to indicate that a thread has attempted to wait on an
object's monitor or to notify other threads waiting on an object's
monitor without owning the specified monitor.
|
| IllegalStateException |
Signals that a method has been invoked at an illegal or
inappropriate time.
|
| IllegalThreadStateException |
Thrown to indicate that a thread is not in an appropriate state
for the requested operation.
|
| 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. |
| InterruptedException |
Thrown when a thread is waiting, sleeping, or otherwise paused for
a long time and another thread interrupts it.
|
| NegativeArraySizeException |
Thrown if an application tries to create an array with negative size.
|
| NullPointerException |
Thrown when an application attempts to use
null in a
case where an object is required. |
| 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.
|
| RuntimeException |
RuntimeException is the superclass of those
exceptions that can be thrown during the normal operation of the
Java Virtual Machine. |
| SecurityException |
Thrown by the system to indicate a security violation.
|
| StringIndexOutOfBoundsException |
Thrown by the
charAt method in class
String and by other String
methods to indicate that an index is either negative or greater
than or equal to the size of the string. |
| UnsupportedOperationException |
Thrown to indicate that the requested operation is not supported.
|
| Error | Description |
|---|---|
| Error |
An
Error is a subclass of Throwable
that indicates serious problems that a reasonable application
should not try to catch. |
| NoClassDefFoundError |
Thrown if the Java Virtual Machine tries to load in the
definition of a class (as part of a normal method call or
as part of creating a new instance using the
new
expression) and no definition of the class could be found. |
| OutOfMemoryError |
Thrown when the Java Virtual Machine cannot allocate an object
because it is out of memory, and no more memory could be made
available by the garbage collector.
|
| VirtualMachineError |
Thrown to indicate that the Java Virtual Machine is broken or has
run out of resources necessary for it to continue operating.
|