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Android Reference

java.lang


Package java.lang

  • Interface Summary
    Interface Description
    Appendable
    Declares methods to append characters or character sequences.
    AutoCloseable
    Defines an interface for classes that can (or need to) be closed once they are not used any longer.
    CharSequence
    This interface represents an ordered set of characters and defines the methods to probe them.
    Cloneable
    This (empty) interface must be implemented by all classes that wish to support cloning.
    Comparable<T>
    This interface should be implemented by all classes that wish to define a natural order of their instances.
    Iterable<T>
    Instances of classes that implement this interface can be used with the enhanced for loop.
    Readable
    Represents a sequence of characters that can be incrementally read (copied) into a CharBuffer.
    Runnable
    Represents a command that can be executed.
    Thread.UncaughtExceptionHandler
    Implemented by objects that want to handle cases where a thread is being terminated by an uncaught exception.
  • Class Summary
    Class Description
    Boolean
    The wrapper for the primitive type boolean.
    Byte
    The wrapper for the primitive type byte.
    Character
    The wrapper for the primitive type char.
    Character.Subset
    Character.UnicodeBlock
    Represents a block of Unicode characters, as defined by the Unicode 4.0.1 specification.
    Class<T>
    The in-memory representation of a Java class.
    ClassLoader
    Loads classes and resources from a repository.
    Compiler
    Does nothing on Android.
    Daemons
    Calls Object.finalize() on objects in the finalizer reference queue.
    Double
    The wrapper for the primitive type double.
    Enum<E extends Enum<E>>
    The superclass of all enumerated types.
    Float
    The wrapper for the primitive type float.
    InheritableThreadLocal<T>
    A thread-local variable whose value is passed from parent to child thread.
    Integer
    The wrapper for the primitive type int.
    IntegralToString
    Converts integral types to strings.
    Long
    The wrapper for the primitive type long.
    Math
    Class Math provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
    Number
    The abstract superclass of the classes which represent numeric base types (that is Byte, Short, Integer, Long, Float, and Double.
    Object
    The root class of the Java class hierarchy.
    Package
    Contains information about a Java package.
    Process
    Represents an external process.
    ProcessBuilder
    Creates operating system processes.
    Runtime
    Allows Java applications to interface with the environment in which they are running.
    RuntimePermission
    Legacy security code; do not use.
    SecurityManager
    Legacy security code; do not use.
    Short
    The wrapper for the primitive type short.
    StackTraceElement
    A representation of a single stack frame.
    StrictMath
    Class StrictMath provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
    String
    An immutable sequence of characters/code units (chars).
    StringBuffer
    A modifiable sequence of characters for use in creating strings, where all accesses are synchronized.
    StringBuilder
    A modifiable sequence of characters for use in creating strings.
    System
    Provides access to system-related information and resources including standard input and output.
    Thread
    A Thread is a concurrent unit of execution.
    ThreadGroup
    ThreadGroup is a means of organizing threads into a hierarchical structure.
    ThreadLocal<T>
    Implements a thread-local storage, that is, a variable for which each thread has its own value.
    Throwable
    The superclass of all classes which can be thrown by the VM.
    UnsafeByteSequence
    A cheaper ByteArrayOutputStream for internal use.
    Void
    Placeholder class for the Java keyword void.
  • Enum Summary
    Enum Description
    Thread.State
    A representation of a thread's state.
  • Exception Summary
    Exception Description
    ArithmeticException
    Thrown when the an invalid arithmetic operation is attempted.
    ArrayIndexOutOfBoundsException
    Thrown when the an array is indexed with a value less than zero, or greater than or equal to the size of the array.
    ArrayStoreException
    Thrown when a program attempts to store an element of an incompatible type in an array.
    ClassCastException
    Thrown when a program attempts to cast a an object to a type with which it is not compatible.
    ClassNotFoundException
    Thrown when a class loader is unable to find a class.
    CloneNotSupportedException
    Thrown when a program attempts to clone an object which does not support the Cloneable interface.
    EnumConstantNotPresentException
    Thrown if an enum constant does not exist for a particular name.
    Exception
    Exception is the superclass of all classes that represent recoverable exceptions.
    IllegalAccessException
    Thrown when a program attempts to access a field or method which is not accessible from the location where the reference is made.
    IllegalArgumentException
    Thrown when a method is invoked with an argument which it can not reasonably deal with.
    IllegalMonitorStateException
    Thrown when a monitor operation is attempted when the monitor is not in the correct state, for example when a thread attempts to exit a monitor which it does not own.
    IllegalStateException
    Thrown when an action is attempted at a time when the VM is not in the correct state.
    IllegalThreadStateException
    Thrown when an operation is attempted which is not possible given the state that the executing thread is in.
    IndexOutOfBoundsException
    Thrown when a program attempts to access a value in an indexable collection using a value which is outside of the range of valid indices.
    InstantiationException
    Thrown when a program attempts to access a constructor which is not accessible from the location where the reference is made.
    InterruptedException
    Thrown when a waiting thread is activated before the condition it was waiting for has been satisfied.
    NegativeArraySizeException
    Thrown when an attempt is made to create an array with a size of less than zero.
    NoSuchFieldException
    Thrown when the VM notices that a program tries to reference, on a class or object, a field that does not exist.
    NoSuchMethodException
    Thrown when the VM notices that a program tries to reference, on a class or object, a method that does not exist.
    NullPointerException
    Thrown when a program tries to access a field or method of an object or an element of an array when there is no instance or array to use, that is if the object or array points to null.
    NumberFormatException
    Thrown when an invalid value is passed to a string-to-number conversion method.
    RuntimeException
    RuntimeException is the superclass of all classes that represent exceptional conditions which occur as a result of executing an application in the VM.
    SecurityException
    Thrown when a security manager check fails.
    StringIndexOutOfBoundsException
    Thrown when the a string is indexed with a value less than zero, or greater than or equal to the size of the array.
    TypeNotPresentException
    Thrown when a program tries to access a class, interface, enum or annotation type through a string that contains the type's name and the type cannot be found.
    UnsupportedOperationException
    Thrown when an unsupported operation is attempted.
  • Error Summary
    Error Description
    AbstractMethodError
    Thrown by the VM when an abstract method is called.
    AssertionError
    Thrown when an assertion has failed.
    ClassCircularityError
    Thrown when the VM notices that an attempt is made to load a class which would directly or indirectly inherit from one of its subclasses.
    ClassFormatError
    Thrown by a class loader when a class file has an illegal format or if the data that it contains can not be interpreted as a class.
    Error
    Error is the superclass of all classes that represent unrecoverable errors.
    ExceptionInInitializerError
    Thrown when an exception occurs during class initialization.
    IllegalAccessError
    Thrown when the VM notices that a program tries access a field which is not accessible from where it is referenced.
    IncompatibleClassChangeError
    IncompatibleClassChangeError is the superclass of all classes which represent errors that occur when inconsistent class files are loaded into the same running image.
    InstantiationError
    Thrown when the VM notices that a program tries to create a new instance of a class which has no visible constructors from the location where new is invoked.
    InternalError
    Thrown when the VM notices that it has gotten into an undefined state.
    LinkageError
    LinkageError is the superclass of all error classes that occur when loading and linking class files.
    NoClassDefFoundError
    Thrown when the VM is unable to locate a class which it has been asked to load.
    NoSuchFieldError
    Thrown when the VM notices that a program tries to reference, on a class or object, a field that does not exist.
    NoSuchMethodError
    Thrown when the VM notices that a program tries to reference, on a class or object, a method that does not exist.
    OutOfMemoryError
    Thrown when a request for memory is made that can not be satisfied using the available platform resources.
    StackOverflowError
    Thrown when the depth of the stack of the running program exceeds some platform or VM specific limit.
    ThreadDeath
    ThreadDeath is thrown when a thread stops executing.
    UnknownError
    Thrown when the VM must throw an error which does not match any known exceptional condition.
    UnsatisfiedLinkError
    Thrown when an attempt is made to invoke a native for which an implementation could not be found.
    UnsupportedClassVersionError
    Thrown when an attempt is made to load a class with a format version that is not supported by the VM.
    VerifyError
    Thrown when the VM notices that an attempt is made to load a class which does not pass the class verification phase.
    VirtualMachineError
    VirtualMachineError is the superclass of all error classes that occur during the operation of the VM.
  • Annotation Types Summary
    Annotation Type Description
    Deprecated
    Annotation type used to mark program elements that should no longer be used by programmers.
    FindBugsSuppressWarnings
    Suppress FindBugs warnings on the annotated element.
    Override
    Annotation type used to mark methods that override a method declaration in a superclass.
    SuppressWarnings
    Annotation type used to indicate that the compiler should not issue the specified warnings for the marked program element.


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