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- README: The Java Developers Kit
-
-
- This 1.0.2 release of the Java Developers Kit (JDK) lets you
- write applets that conform to the 1.0 Java applet API.
-
-
- The JDK helps you to:
- ---------------------
- - Develop applets that conform to the final applet API
- - Create applets that run in all Java-enabled browsers
- - Develop Java applications
- - Experiment with the debugger API (and a prototype
- command-line debugger)
-
-
- Supported platforms
- -------------------
- The JDK is available for SPARC Solaris, x86 Solaris, Windows NT,
- Windows 95, and Mac.
-
-
- The JDK contains:
- -----------------
- - classes.zip
- DO NOT UNZIP THIS FILE! It is needed by the compiler and
- interpreter.
-
- - src.zip
- This is a set of source files that may be unzipped if
- desired. You can get a free copy of the correct version
- of unzip from ftp://ftp.uu.net/pub/archiving/zip/WIN32 .
-
- - Java Applet Viewer
- for testing and running applets
-
- - Java Debugger API and Prototype Debugger,
- an API (java.tools.debug) and prototype
- of a command-line debugger that uses the API
-
- - Java Compiler
-
- - Java Interpreter
-
- NOTE: This release does NOT include a Web browser.
-
-
- What is the final applet API?
- ------------------------------
- The final applet API consists of the following packages: java.lang,
- java.util, java.io, java.net, java.awt, java.awt.peer, java.awt.image,
- and java.applet. We and our partners are committed to supporting
- this API.
-
-
- ----------------------------------------------------------------------
- IMPORTANT: Please make sure you understand the Copyright and License
- information (in the file named COPYRIGHT) before using this release.
- ----------------------------------------------------------------------
-
-
- The rest of this document has the following sections:
-
- - Where to find more information
- - Running applets with the Applet Viewer
- - The APPLET tag
- - Debugging programs with JDB
-
-
- Where to find more information
- ------------------------------
- This file is the only documentation included in this release. The
- rest of the information you need is on our website:
-
- http://java.sun.com/products/JDK/
-
- It includes the following:
-
- - Frequently asked questions
- - Applet examples (some of which are in this release, as well)
- - API documentation
- - Documentation for the Java programming tools (including java,
- javac, and jdb)
- - The latest Java Language Specification
- - Release specific information
-
- If you have questions, problems, or comments:
-
- 1. Check out the FAQ at:
-
- http://java.sun.com/products/JDK/faq.html
-
- 2. Before filing a bug report, please check the known bugs at:
-
- http://java.sun.com/products/JDK/1.0.2/KnownBugs-JDK.html
-
- File bug reports following the instructions at:
-
- http://java.sun.com/GettingInTouch/BugReport.html
-
- 3. The newsgroup comp.lang.java and the Java/HotJava mailing lists
- are active forums for posting questions and exchanging information
- with other Java users. See http://java.sun.com/mail.html for
- information on accessing the newsgroup and mailing lists.
-
- 4. Other questions can be sent to java@java.sun.com.
-
-
- Running applets with the Applet Viewer
- --------------------------------------
- Here are two examples of using the Applet Viewer:
-
- bin/appletviewer demo/GraphLayout/example1.html
- bin/appletviewer http://java.sun.com/applets/applets/NervousText/example1.html
- (On the PC, use "bin\appletviewer" instead of "bin/appletviewer".)
-
- The argument is a filename or URL that refers to an HTML file that
- contains one or more APPLET tags. The Applet Viewer finds the APPLET
- tags in the HTML file and runs the applets as specified by the tags
- (in separate windows).
-
-
- The APPLET tag
- --------------
- The APP tag of previous releases is gone, replaced by the APPLET tag.
- Here is an example of a simple APPLET tag:
-
- <applet code="MyApplet.class" width=100 height=140></applet>
-
- This tells the viewer or browser to load the applet whose compiled
- code is in MyApplet.class (in the same directory as the current HTML
- document), and to set the initial size of the applet to 100 pixels
- wide and 140 pixels high.
-
- Here's a more complex example of an APPLET tag:
-
- <applet codebase="http://java.sun.com/applets/applets/NervousText"
- code="NervousText.class" width=400 height=75 align=center >
- <param name="text" value="This is the Applet Viewer.">
- <blockquote>
- <hr>
- If you were using a Java-enabled browser,
- you would see dancing text instead of this paragraph.
- <hr>
- </blockquote>
- </applet>
-
- This tells the viewer or browser to load the applet whose compiled
- code is at the URL
- http://java.sun.com/applets/applets/NervousText/NervousText.class,
- to set the initial size of the applet to 400x75 pixels, and to align
- the applet in the center of the line. The viewer/browser must also
- set the applet's "text" attribute (which customizes the text this
- applet displays) to be "This is the Applet Viewer." If the page is
- viewed by a browser that can't execute Java applets, then the browser
- will ignore the APPLET and PARAM tags, displaying the HTML between
- the <blockquote> and </blockquote> tags. Java-enabled browsers
- *ignore* that HTML.
-
- Here's the complete syntax for the APPLET tag:
-
- '<' 'APPLET'
- ['CODEBASE' '=' codebaseURL]
- 'CODE' '=' appletFile
- ['ALT' '=' alternateText]
- ['NAME' '=' appletInstanceName]
- 'WIDTH' '=' pixels 'HEIGHT' '=' pixels
- ['ALIGN' '=' alignment]
- ['VSPACE' '=' pixels] ['HSPACE' '=' pixels]
- '>'
- ['<' 'PARAM' 'NAME' '=' appletAttribute1 'VALUE' '=' value '>']
- ['<' 'PARAM' 'NAME' '=' appletAttribute2 'VALUE' '=' value '>']
- . . .
- [alternateHTML]
- '</APPLET>'
-
- 'CODEBASE' '=' codebaseURL
- This optional attribute specifies the base URL of the applet --
- the directory that contains the applet's code. If this attribute
- is not specified, then the document's URL is used.
-
- 'CODE' '=' appletFile
- This required attribute gives the name of the file that contains
- the applet's compiled Applet subclass. This file is relative to
- the base URL of the applet. It cannot be absolute.
-
- 'ALT' '=' alternateText
- This optional attribute specifies any text that should be
- displayed if the browser understands the APPLET tag but can't
- run Java applets.
-
- 'NAME' '=' appletInstanceName
- This optional attribute specifies a name for the applet instance,
- which makes it possible for applets on the same page to find (and
- communicate with) each other.
-
- 'WIDTH' '=' pixels 'HEIGHT' '=' pixels
- These required attributes give the initial width and height (in
- pixels) of the applet display area, not counting any windows or
- dialogs that the applet brings up.
-
- 'ALIGN' '=' alignment
- This required attribute specifies the alignment of the applet.
- The possible values of this attribute are the same as those for
- the IMG tag: left, right, top, texttop, middle, absmiddle,
- baseline, bottom, absbottom.
-
- 'VSPACE' '=' pixels 'HSPACE' '=' pixels
- These option attributes specify the number of pixels above and
- below the applet (VSPACE) and on each side of the applet (HSPACE).
- They're treated the same way as the IMG tag's VSPACE and HSPACE
- attributes.
-
- '<' 'PARAM' 'NAME' '=' appletAttribute1 'VALUE' '=' value '>' . . .
- This tag is the only way to specify an applet-specific attribute.
- Applets access their attributes with the getParameter() method.
-
-
- Debugging programs with JDB
- ---------------------------
- This release contains the Java Debugger (JDB), an alpha-quality
- prototype of a command-line debugger for Java classes. It is
- designed to test the Java Debugger API, which is in the package
- java.tools.debug. We look forward to getting your feedback on
- the debugger API.
-
- You can debug applets using the -debug option of appletviewer.
- When debugging applets, it's best to invoke appletviewer from
- the directory that contains the applet's HTML file. For example,
- on Solaris:
-
- cd demo/TicTacToe
- ../../bin/appletviewer -debug example1.html
-
- On the PC:
-
- cd demo\TicTacToe
- ..\..\bin\appletviewer -debug example1.html
-
- You can find documentation on the debugger and its API at:
-
- http://java.sun.com/products/JDK/debugging/
-
-