Java Application Programmers Interface

The Java Application Programmers Interface 1.0.2

This is no longer documented or supported by its developers: Sun.

Also see [ java.classes.html ] which displays the classes hierarchically complete with properties and selected fields and methods. This API is also indexed and documented by:

• (Index to documentation): [ index.html ]
• (Packages): [ packages.html ]
• (Names): [ AllNames.html ]
• (Tree): [ tree.html ]
1. API_1_2::=following
   Net
   Notes:
   • All defined are for classes unless marked interface etc.
   • The "@C" are the possible subsets/subtypes/extensions of class C.
   • All class extend Object.
   • The name is defined by a link to a page specifying all non-private fields and methods.
   • This does not show "Peer" and "Remote" classes.
   • Many of the classes added between 1.0 and 1.2 are not listed here.

   A

   1. AbstractMethodError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.AbstractMethodError.html

   2. Applet::@Panel, [ java.applet.Applet.html ]
   3. AppletContext::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.applet.AppletContext.html
   4. AppletStub::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.applet.AppletStub.html

   5. ArithmeticException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ArithmeticException.html
   6. ArrayIndexOutOfBoundsException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ArrayIndexOutOfBoundsException.html
   7. ArrayStoreException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ArrayStoreException.html

   8. AudioClip::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.applet.AudioClip.html

   9. AWTError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.AWTError.html
   10. AWTException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.AWTException.html

       B

   11. BitSet::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.BitSet.html
   12. Boolean::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Boolean.html

   13. BorderLayout::@#LayoutManager, [ java.awt.BorderLayout.html ] A LayoutManager that has a component in the center, top(north), bottom(south), left(west), and right(east) of it, or any subset of these.

   14. BufferedInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.BufferedInputStream.html
   15. BufferedOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.BufferedOutputStream.html

   16. Button::@Component, [ java.awt.Button.html ]

   17. ByteArrayInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.ByteArrayInputStream.html
   18. ByteArrayOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.ByteArrayOutputStream.html

       C

   19. Canvas::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Canvas.html, a Component that permits graphics.

   20. CardLayout::@#LayoutManager, [ java.awt.CardLayout.html ] A LayoutManager which allows only one of its components to visible at any one time as selected byte show(...) method.

   21. Character::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Character.html, reference to a 16bit Unicode symbol.

   22. Checkbox::@Component, [ java.awt.Checkbox.html ]
   23. CheckboxGroup::@Component, [ java.awt.CheckboxGroup.html ]
   24. CheckboxMenuItem::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.CheckboxMenuItem.html

   25. Choice::@Component, [ java.awt.Choice.html ]

   26. Class::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Class.html, meta-information about the class of an object.

   27. ClassCastException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ClassCastException.html
   28. ClassCircularityError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ClassCircularityError.html
   29. ClassFormatError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ClassFormatError.html

   30. ClassLoader::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ClassLoader.html

   31. ClassNotFoundException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ClassNotFoundException.html

   32. Cloneable::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Cloneable.html, interface, classes that allow their objects to copied to create a new Object with the same data store.

   33. CloneNotSupportedException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.CloneNotSupportedException.html

   34. Color::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Color.html
   35. ColorModel::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.ColorModel.html

   36. Compiler::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Compiler.html

   37. Component::@Object, [ java.awt.Component.html ] Components in a Graphic User Interface including: Button, List, TextField, TextArea, CheckBox, CheckBoxGroup, Dialog, Frame, Scrollbar, Choice, Canvas, Frame, Panel, Window.

   38. Container::@Component, [ java.awt.Container.html ] A class of graphical User interface objects that can contain a varying number of other graphic objects (Component). All Containers have a LayoutManager and a way to add and remove components.

   39. ContentHandler::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.ContentHandler.html
   40. ContentHandlerFactory::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.ContentHandlerFactory.html

   41. CropImageFilter::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.CropImageFilter.html

       D

   42. DatagramPacket::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.DatagramPacket.html
   43. DatagramSocket::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.DatagramSocket.html

   44. DataInput::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.DataInput.html
   45. DataInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.DataInputStream.html
   46. DataOutput::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.DataOutput.html
   47. DataOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.DataOutputStream.html

   48. Date::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Date.html

   49. DebuggerCallback::= See http://www.javasoft.com/products/jdk/1.2/docs/api/sun.tools.debug.DebuggerCallback.html

   50. Dialog::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Dialog.html

   51. Dictionary::@HashTable, [ java.util.Dictionary.html ]

   52. Dimension::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Dimension.html, This is an object that can keep track of the int width and hieght of something.

   53. DirectColorModel::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.DirectColorModel.html

   54. Double::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Double.html, reference to a double length number.

       E

   55. EmptyStackException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.EmptyStackException.html

   56. Enumeration::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Enumeration.html Java's iterator.

   57. EOFException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.EOFException.html

   58. Error::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Error.html

   59. Event::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Event.html

   60. Exception::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Exception.html

       F

   61. File::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.File.html
   62. FileDescriptor::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FileDescriptor.html
   63. FileDialog::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.FileDialog.html
   64. FileInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FileInputStream.html
   65. FilenameFilter::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FilenameFilter.html
   66. FileNotFoundException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FileNotFoundException.html
   67. FileOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FileOutputStream.html

   68. FilteredImageSource::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.FilteredImageSource.html
   69. FilterInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FilterInputStream.html
   70. FilterOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.FilterOutputStream.html

   71. Float::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Float.html, single length floating point object.

   72. FlowLayout::@#LayoutManager, [ java.awt.FlowLayout.html ] A LayoutManager a manager that places objects, in the order added across the component and then row by row. Or in columns. In each row items can be centered, left, or right aligned.

   73. Font::@Object, [ java.awt.Font.html ] In JDK1.0 the commonest fonts are Helvetica, TimeRoman, and Courier which caused copyright problems. The names have been changed to SanSerif, Serif, and Monospaced in JDK1.1. This class also defiines constants like Font.BOLD, Font.ITALIC, and Font.PLAIN.

   74. FontMetrics::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.FontMetrics.html

   75. Frame::@Window, [ java.awt.Frame.html ]

       G

   76. Graphics::@Object, [ java.awt.Graphics.html ] A Graphics object knows how to draw and fill: Rectangles (plain, 3D, or with rounded corners), ovals, arcs, lines, strings, in different Color's, and how to clear rectangles.

   77. GridBagConstraints::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.GridBagConstraints.html
   78. GridBagLayout::@LayoutMananger, [ java.awt.GridBagLayout.html ] A LayoutManager that is based on a grid but where each component can take up any non-overlapping (tiled) rectangular set of grid rectangles. Complex and clever.

   79. GridLayout::@LayoutManager, [ java.awt.GridLayout.html ] A LayoutManager a simple two dimensional grid with fixed dimensions.

       H

   80. Hashtable::@Object, [ java.util.Hashtable.html ]

       I

   81. IllegalAccessError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IllegalAccessError.html
   82. IllegalAccessException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IllegalAccessException.html
   83. IllegalArgumentException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IllegalArgumentException.html
   84. IllegalMonitorStateException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IllegalMonitorStateException.html
   85. IllegalThreadStateException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IllegalThreadStateException.html

   86. Image::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Image.html
   87. ImageConsumer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.ImageConsumer.html
   88. ImageFilter::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.ImageFilter.html
   89. ImageObserver::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.ImageObserver.html
   90. ImageProducer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.ImageProducer.html

   91. IncompatibleClassChangeError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IncompatibleClassChangeError.html

   92. IndexColorModel::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.IndexColorModel.html

   93. IndexOutOfBoundsException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.IndexOutOfBoundsException.html

   94. InetAddress::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.InetAddress.html

   95. InputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.InputStream.html

   96. Insets::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Insets.html

   97. InstantiationError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.InstantiationError.html
   98. InstantiationException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.InstantiationException.html

   99. Integer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Integer.html

   100. InternalError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.InternalError.html

   101. InterruptedException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.InterruptedException.html
   102. InterruptedIOException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.InterruptedIOException.html
   103. IOException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.IOException.html

        L

   104. Label::@Component, [ java.awt.Label.html ]

   105. LayoutManager::=BorderLayout | CardLayout | FlowLayout | GridBagLayout | GridLayout. A class of objects that can control the positioning of components inside a Container. [ java.awt.LayoutManager.html ]

   106. LineNumberInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.LineNumberInputStream.html

   107. LinkageError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.LinkageError.html

   108. List::@Component, [ java.awt.List.html ] List of items in a scrollable window allowing the user to select one of them.

   109. LocalVariable::= See http://www.javasoft.com/products/jdk/1.2/docs/api/sun.tools.debug.LocalVariable.html

   110. Long::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Long.html, a reference to a long integer item of data.

        M

   111. MalformedURLException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.MalformedURLException.html

   112. Math::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Math.html, a collection of useful functions and constants.

   113. MediaTracker::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.MediaTracker.html

   114. MemoryImageSource::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.MemoryImageSource.html

   115. Menu::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Menu.html
   116. MenuBar::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.MenuBar.html
   117. MenuComponent::@Object, [ java.awt.MenuComponent.html ]
   118. MenuContainer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.MenuContainer.html
   119. MenuItem::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.MenuItem.html

        N

   120. NegativeArraySizeException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NegativeArraySizeException.html
   121. NoClassDefFoundError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NoClassDefFoundError.html
   122. NoSuchElementException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.NoSuchElementException.html
   123. NoSuchFieldError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NoSuchFieldError.html
   124. NoSuchMethodError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NoSuchMethodError.html
   125. NoSuchMethodException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NoSuchMethodException.html
   126. NullPointerException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NullPointerException.html

   127. Number::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Number.html, superclass of Double, Float, Integer, ...
   128. NumberFormatException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.NumberFormatException.html

        O

   129. Object::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Object.html

   130. Observable::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Observable.html
   131. Observer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Observer.html

   132. OutOfMemoryError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.OutOfMemoryError.html

   133. OutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.OutputStream.html

        P

   134. Panel::@Container, [ java.awt.Panel.html ]

   135. PipedInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.PipedInputStream.html
   136. PipedOutputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.PipedOutputStream.html

   137. PixelGrabber::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.PixelGrabber.html

   138. Point::@Object, [ java.awt.Point.html ] This is not a graphic object but an object with two integer coordinates called x and y.

   139. Polygon::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Polygon.html

   140. PrintStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.PrintStream.html

   141. Process::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Process.html

   142. Properties::@Dictionary, [ java.util.Properties.html ]

   143. ProtocolException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.ProtocolException.html

   144. PushbackInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.PushbackInputStream.html

        R

   145. Random::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Random.html

   146. RandomAccessFile::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.RandomAccessFile.html

   147. Rectangle::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Rectangle.html, this not a grphic object but a record of two co-ordinates (x and y) and a pair of dimensions(width and hieght). It comes with a lot of operations including intersection and union.

   148. RGBImageFilter::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.image.RGBImageFilter.html

   149. Runnable::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Runnable.html, interface for Classes of objects that have a public void run() function. A Runnable object can be execute by a Thread object in a separate concurrent thread of control.

   150. Runtime::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Runtime.html
   151. RuntimeConstants::= See http://www.javasoft.com/products/jdk/1.2/docs/api/sun.tools.java.RuntimeConstants.html
   152. RuntimeException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.RuntimeException.html

        S

   153. Scrollbar::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Scrollbar.html

   154. SecurityException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.SecurityException.html
   155. SecurityManager::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.SecurityManager.html

   156. SequenceInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.SequenceInputStream.html

   157. ServerSocket::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.ServerSocket.html
   158. Socket::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.Socket.html
   159. SocketException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.SocketException.html
   160. SocketImpl::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.SocketImpl.html
   161. SocketImplFactory::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.SocketImplFactory.html

   162. Stack::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Stack.html, a specialized Vector.

   163. StackOverflowError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.StackOverflowError.html
   164. StreamTokenizer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.StreamTokenizer.html

   165. String::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.String.html, a fixed sequence of characters.
   166. StringBuffer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.StringBuffer.html, a variable sequence of characters.
   167. StringBufferInputStream::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.StringBufferInputStream.html
   168. StringIndexOutOfBoundsException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.StringIndexOutOfBoundsException.html
   169. StringTokenizer::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.StringTokenizer.html

   170. System::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.System.html

        T

   171. TextArea::@TextComponent, [ java.awt.TextArea.html ]

   172. TextComponent::@Component, [ java.awt.TextComponent.html ]

   173. TextField::@TextComponent, [ java.awt.TextField.html ]

   174. Thread::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Thread.html
   175. ThreadDeath::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ThreadDeath.html
   176. ThreadGroup::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.ThreadGroup.html

   177. Throwable::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.Throwable.html, Something that can be used in throw and catch statements. Includes Exception and Error.

   178. Toolkit::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Toolkit.html

        U

   179. UnknownError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.UnknownError.html
   180. UnknownHostException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.UnknownHostException.html
   181. UnknownServiceException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.UnknownServiceException.html
   182. UnsatisfiedLinkError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.UnsatisfiedLinkError.html

   183. URL::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.URL.html
   184. URLConnection::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.URLConnection.html
   185. URLEncoder::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.URLEncoder.html
   186. URLStreamHandler::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.URLStreamHandler.html
   187. URLStreamHandlerFactory::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.net.URLStreamHandlerFactory.html

   188. UTFDataFormatException::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.io.UTFDataFormatException.html

        V

   189. Vector::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.util.Vector.html, a dynamic array.

   190. VerifyError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.VerifyError.html
   191. VirtualMachineError::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.lang.VirtualMachineError.html

        W

   192. Window::= See http://www.javasoft.com/products/jdk/1.2/docs/api/java.awt.Window.html, Either a Dialog or a Frame.

   
   (End of Net API_1_2)
   
   

   The Java Application Programmers Interface 1.1.5

   
   (Index_1_1): [ index.html ]

   
   (ClassList_1_1): [ classlist.html ]

   
   (Packages_1_1): [ packages.html ]

   
   (Names_1_1): [ a-names.html ]

   
   (Tree_1_1): [ tree.html ]

2. API_1_1::=following
   Net
   The JDK uses the previous Application Programmer's Interface
   1. API_1_0 plus new features [ features.html ] some of which are defined given below.

      New Event Handling

      Many components(objects in class Component) implement a function like this: component.addTypeListener(l) where l is in a class that implements the TypeListener interface and Type is a name of a type of AWTEvent. The TypeListener interface defines a a void function actionsomething(TypeListener event). The something varies with the Type of the event. Another class can define a class that implements TypeListener by handling the events. It constructs an object of this tpe and passes it to the component using the addTypeListener function. When events occur the implemented function is called with arguments defining the event.

       	anXListener---implements--->interface----used by---->aComponent

       	anXListener-passed by-addXListener(anXListener)-to-->aComponent

       	anXListener<------gets called when an XEvent hits----aComponent

      A more detailed model using the Unified Modeling Language can be downloaded: [ listener.mdl ] and viewed with Rational Rose.

      To support this model Java1.2 makes it easier to construct and object and and describe its class in a single statement [ anonymous_class_object in java.syntax ] -- without having to name the class.

   2. AWTEvent::abstract_class=ActionEvent | ItemEvent | WindowEvent | ComponentEvent | AdjustmentEvent | MouseEvent | KeyEvent | FocusEvent. All these events have a getSource() method that tells a listener which object generated the event.

      The event handling uses grouped classes of AWTEvents, addListener functions, Listener interfaces, and Adapter classes. To implement one of the interfaces below the class must (1) state that it "implements Interface_name" in its header and (2) define all the functions listed in the interface. The Adapter classes supply default empty functions for the functions in the interface, so by extending an Adapter class you only have to defined the listening functions that do something.

      Event	Sent by	To	Added by	Adapter
      ActionEvent	Button,List,MenuItem,TextField	ActionListener:actionPerformed	addActionListener	ActionAdapter
      AdjustmentEvent	Scrollbar	AdjustmentListener:adjustmentValueChanged	addAdjustmentListener	AdjustmentAdapter
      ComponentEvent	Dialog, Frame	ComponentListener:componentMoved,componentHidden,componentResized,ComponentShown	addComponentListener	ComponentAdapter
      FocusEvent	any Component	FocusListener:focusGained,focusLost	addFocusListener	FocusAdapter
      ItemEvent	Checkbox,CheckboxMenuItem,Choice,List	ItemListener:itemStateChanged	addItemListener	ItemAdjuster
      KeyEvent	any Component	KeyListener:keyPressed,keyReleased,keyTyped	addKeyListener	KeyAdapter
      MouseEvent	Canvas,Dialog,Frame,Panel,Window.	MouseListener:mouseDragged,mousePressed,mouseClicked,mouseEntered,mouseExited	addMouseListener	MouseAdapter
      WindowEvent	Dialog,Frame.	WindowListener:windowClosing, windowOpened, windowIconified,windowDeiconified,windowClosed	addWindowListener	WindowAdapter
      MouseMovedEvent	etc

   3. ActionEvent::@AWTEvent, sent by Button, List, MenuItem, and TextField.
   4. addActionListener::=add ActionListener (_) to the components list of listeners
   5. ActionListener::interface= { actionPerformed(ActionEvent) }.
   6. ActionAdapter::abstract_class, provides empty functions for the interface.

   7. AdjustmentEvent::@AWTEvent, sent by Scrollbar
   8. addAdjustmentEvent::=add AdjustmentListener (_) to the components list of listeners
   9. AdjustmentListener::interface={ adjustmentValueChanged(AdjustmentEvent)}.
   10. AdjustmentAdapter::abstract_class, provides empty functions for the interface.

   11. ComponentEvent::@AWTEvent, sent by Dialog and Frame.
   12. addComponentListener::=add ComponentListener (_) to the components list of listeners
   13. ComponentListener::interface={componentMoved(ComponentEvent),componentHidden(ComponentEvent),componentResized(ComponentEvent),componentShown(ComponentEvent)}.
   14. ComponentAdapter::abstract_class, provides empty functions for the interface.

   15. FocusEvent::@AWTEvent, could be sent by any Component.
   16. addFocusListener::=add FocusListener (_) to the components list of listeners
   17. FocusListener::interface={ focusGained(FocusEvent), focusLost(FocusEvent)}.
   18. FocusAdapter::abstract_class, provides empty functions for the interface.

   19. ItemEvent::@AWTEvent, sent by objects in classes Checkbox, CheckboxMenuItem, Choice, List.
   20. addItemListener::=add ItemListener (_) to the components list of listeners
   21. ItemListener::interface={ itemStateChanged(ItemEvent) }.
   22. ItemAdapter::abstract_class, provides empty functions for the interface.

   23. IOEvent::=KeyEvent | MouseEvent.

   24. KeyEvent::@AWTEvent, can be sent by any object in class Component.
   25. addKeyListener::=add KeyListener (_) to the components list of listeners
   26. KeyListener::interface={ keyPressed(KeyEvent), keyReleased(KeyEvent). keyTyped(KeyEvent)}
   27. KeyAdapter::abstract_class, provides empty functions for the interface.

   28. MouseEvent::@AWTEvent, Can be sent by objects that are: Canvas, Dialog, Frame, Panel, Window.
   29. addMouseListener::=add MouseListener (_) to the components list of listeners
   30. MouseListener::interface={ mouseDragged(MouseEvent),mousePressed(MouseEvent),mouseClicked(MouseEvent),mouseEntered(MouseEvent),mouseExited(MouseEvent)}.
   31. MouseAdapter::abstract_class, provides empty functions for the interface.

       There is also a set of MouseMovedEvents...

   32. WindowEvent::@AWTEvent, can be sent by objects in Dialog and Frame.
   33. addWindowListener::=add WindowListener (_) to the components list of listeners
   34. WindowListener::interface={ windowClosing(WindowEvent), windowOpened(WindowEvent), windowIconified(WindowEvent),windowDeiconified(WindowEvent),windowClosed(WindowEvent)}.
   35. WindowAdapter::abstract_class, provides empty functions for the interface.

       Character-based Input/Output

       These echo the structure of InputStream and OutputStream:

   36. Reader::abstract_class=BufferedReader | CharArrayReader | FileReader | PipedReader | StringReader.
   37. BufferedReader::@Reader.
   38. CharArrayReader::@Reader.
   39. FileReader::@Reader.
   40. PipedReader::@Reader.
   41. StringReader::@Reader.

   42. Writer::abstract_class=BufferedWriter | CharArrayWriter | FileWriter | PipedWriter | StringWriter.
   43. BufferedWriter::@Writer.
   44. CharArrayWriter::@Writer.
   45. FileWriter::@Writer.
   46. PipedWriter::@Writer.
   47. StringWriter::@Writer.

       Miscelaneous New Classes

   48. MenuShortCut::@Object.

   
   (End of Net)
   
   

   Glossary

3. abstract_class::=`A class with one or more abstract functions. No objects can be made for this class but there can be references to abstract_classes and classes derived from them that are not abstract.
4. interface::=a list of public abstract methods(functions) that other classes can implement. A variable can refer to any object that implements an interface but no objects can be created for an interface directly.

. . . . . . . . . ( end of section Java Application Programmers Interface) <<Contents | End>>