Package | Description |
---|---|
java.io |
Contains Input/Output streams communication classes.
|
java.lang |
Contains core language classes.
|
java.lang.annotation |
Contains core language classes related to compile-time annotations.
|
java.security |
Contains core language classes related to permission management.
|
java.util |
Contains utility classes including the collections framework and date manipulation.
|
Modifier and Type | Class and Description |
---|---|
class |
EOFException
Signals that an end of file or end of stream has been reached unexpectedly during input.
|
class |
InterruptedIOException
Signals that an I/O operation has been interrupted.
|
class |
IOException
Signals that an I/O exception of some sort has occurred.
|
class |
UnsupportedEncodingException
The Character Encoding is not supported.
|
class |
UTFDataFormatException
Signals that a malformed string in modified UTF-8
format has been read in a data input stream or by any class that implements the data input
interface.
|
Modifier and Type | Class and Description |
---|---|
class |
AbstractMethodError
Thrown when an application tries to call an abstract method.
|
class |
ArithmeticException
Thrown when an exceptional arithmetic condition has occurred.
|
class |
ArrayIndexOutOfBoundsException
Thrown to indicate that an array has been accessed with an illegal index.
|
class |
ArrayStoreException
Thrown to indicate that an attempt has been made to store the wrong type of object into an array
of objects.
|
class |
AssertionError
Thrown to indicate that an assertion has failed.
|
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 |
Class<T>
Instances of the class
Class represent classes and interfaces in a running Java
application. |
class |
ClassCastException
Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not
an instance.
|
class |
ClassCircularityError
Thrown when the Java Virtual Machine detects a circularity in the superclass hierarchy of a class
being loaded.
|
class |
ClassFormatError
Thrown when the Java Virtual Machine attempts to read a class file and determines that the file
is malformed or otherwise cannot be interpreted as a class file.
|
class |
ClassNotFoundException
Thrown when an application tries to load in a class through its string name using:
The
forName method in class Class . |
class |
CloneNotSupportedException
Thrown to indicate that the
clone method in class Object has been
called to clone an object, but that the object's class does not implement the
Cloneable interface. |
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 |
Error
An
Error is a subclass of Throwable that indicates serious problems that a
reasonable application should not try to catch. |
class |
Exception
The class
Exception and its subclasses are a form of Throwable that indicates
conditions that a reasonable application might want to catch. |
class |
ExceptionInInitializerError
Signals that an unexpected exception has occurred in a static initializer.
|
class |
Float
The
Float class wraps a value of primitive type float in an object. |
class |
IllegalAccessError
Thrown if an application attempts to access or modify a field, or to call a method that it does
not have access to.
|
class |
IllegalAccessException
An IllegalAccessException is thrown when an application tries to reflectively create an instance
(other than an array), set or get a field, or invoke a method, but the currently executing method
does not have access to the definition of the specified class, field, method or constructor.
|
class |
IllegalArgumentException
Thrown to indicate that a method has been passed an illegal or inappropriate argument.
|
class |
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.
|
class |
IllegalStateException
Signals that a method has been invoked at an illegal or inappropriate time.
|
class |
IllegalThreadStateException
Thrown to indicate that a thread is not in an appropriate state for the requested operation.
|
class |
IncompatibleClassChangeError
Thrown when an incompatible class change has occurred to some class definition.
|
class |
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.
|
class |
InstantiationError
Thrown when an application tries to use the Java
new construct to instantiate an
abstract class or an interface. |
class |
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. |
class |
Integer
The
Integer class wraps a value of the primitive type int in an object. |
class |
InternalError
Thrown to indicate some unexpected internal error has occurred in the Java Virtual Machine.
|
class |
InterruptedException
Thrown when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted,
either before or during the activity.
|
class |
LinkageError
Subclasses of
LinkageError indicate that a class has some dependency on another class;
however, the latter class has incompatibly changed after the compilation of the former class. |
class |
Long
The
Long class wraps a value of the primitive type long in an object. |
class |
NegativeArraySizeException
Thrown if an application tries to create an array with negative size.
|
class |
NoClassDefFoundError
Thrown if the Java Virtual Machine or a
ClassLoader instance 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. |
class |
NoSuchFieldError
Thrown if an application tries to access or modify a specified field of an object, and that
object no longer has that field.
|
class |
NoSuchFieldException
Signals that the class doesn't have a field of a specified name.
|
class |
NoSuchMethodError
Thrown if an application tries to call a specified method of a class (either static or instance),
and that class no longer has a definition of that method.
|
class |
NoSuchMethodException
Thrown when a particular method cannot be found.
|
class |
NullPointerException
Thrown when an application attempts to use
null in a case where an object is required. |
class |
Number
The abstract class
Number is the superclass of classes BigDecimal ,
BigInteger , Byte , Double , Float ,
Integer , Long , and Short . |
class |
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.
|
class |
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.
|
class |
ReflectiveOperationException
Common superclass of exceptions thrown by reflective operations in core reflection.
|
class |
RuntimeException
RuntimeException is the superclass of those exceptions that can be thrown during the
normal operation of the Java Virtual Machine. |
class |
RuntimePermission
This class is for runtime permissions.
|
class |
SecurityException
Thrown by the security manager to indicate a security violation.
|
class |
Short
The
Short class wraps a value of primitive type short in an object. |
class |
StackOverflowError
Thrown when a stack overflow occurs because an application recurses too deeply.
|
class |
StackTraceElement
An element in a stack trace.
|
class |
String
The
String class represents character strings. |
class |
StringBuffer
A thread-safe, mutable sequence of characters.
|
class |
StringBuilder
A mutable sequence of characters.
|
class |
StringIndexOutOfBoundsException
Thrown by
String methods to indicate that an index is either negative or greater
than the size of the string. |
static class |
Thread.State
A thread state.
|
class |
Throwable
The
Throwable class is the superclass of all errors and exceptions in the Java language. |
class |
UnknownError
Thrown when an unknown but serious exception has occurred in the Java Virtual Machine.
|
class |
UnsatisfiedLinkError
Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a
method declared
native . |
class |
UnsupportedClassVersionError
Thrown when the Java Virtual Machine attempts to read a class file and determines that the major
and minor version numbers in the file are not supported.
|
class |
UnsupportedOperationException
Thrown to indicate that the requested operation is not supported.
|
class |
VerifyError
Thrown when the "verifier" detects that a class file, though well formed, contains some sort of
internal inconsistency or security problem.
|
class |
VirtualMachineError
Thrown to indicate that the Java Virtual Machine is broken or has run out of resources necessary
for it to continue operating.
|
Modifier and Type | Class and Description |
---|---|
class |
ElementType
A program element type.
|
class |
RetentionPolicy
Annotation retention policy.
|
Modifier and Type | Class and Description |
---|---|
class |
BasicPermission
The BasicPermission class extends the Permission class, and can be used as the base class for
permissions that want to follow the same naming convention as BasicPermission.
|
class |
Permission
Abstract class for representing access to a system resource.
|
Modifier and Type | Class and Description |
---|---|
static class |
AbstractMap.SimpleEntry<K,V>
An Entry maintaining a key and a value.
|
static class |
AbstractMap.SimpleImmutableEntry<K,V>
An Entry maintaining an immutable key and value.
|
class |
ArrayList<E>
Resizable-array implementation of the
List interface. |
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 |
ConcurrentModificationException
This exception may be thrown by methods that have detected concurrent modification of an object
when such modification is not permissible.
|
class |
Date
The class
Date represents a specific instant in time, with millisecond precision. |
class |
EmptyStackException
Thrown by methods in the
Stack class to indicate that the stack is empty. |
class |
EventObject
The root class from which all event state objects shall be derived.
|
class |
HashMap<K,V>
Hash table based implementation of the
Map interface. |
class |
Hashtable<K,V>
This class implements a hash table, which maps keys to values.
|
class |
NoSuchElementException
Thrown by the
nextElement method of an Enumeration to indicate that
there are no more elements in the enumeration. |
class |
PropertyPermission
This class is for property permissions.
|
class |
Random
An instance of this class is used to generate a stream of pseudorandom numbers.
|
class |
Stack<E>
The
Stack class represents a last-in-first-out (LIFO) stack of objects. |
class |
TimeZone
TimeZone represents a time zone offset, and also figures out daylight savings. |
class |
Vector<E>
The
Vector class implements a growable array of objects. |