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- README
-
- Java(tm) Development Kit
- JDK(tm) 1.1.4
-
- -----------------------------------------------------------------------
- CONTENTS
-
-
- Overview of Java
- - Introduction
- - Purpose
- - Version Compatibility
- - Bug Fixes
- - What the JDK Contains
- - Where to Find More Information
- - Submitting Comments
- - Reporting Bugs and Requesting Features
- - JavaBeans(tm) and the Beans Development Kit
-
- Installing and Running Java
- - Installation Notes
- - Windows
- - Running Java Tools in Microsoft Windows
- - Microsoft Windows PATH and CLASSPATH
- - Microsoft Windows Installation Troubleshooting
- - Solaris
- - Running Java Tools in Solaris
- - Solaris PATH and CLASSPATH
- - Solaris Installation Troubleshooting
- - Running Applets with the AppletViewer
- - Debugging Programs with the Java Debugger
-
-
- =======================================================================
- OVERVIEW OF JAVA
- =======================================================================
-
- -----------------------------------------------------------------------
- INTRODUCTION
- -----------------------------------------------------------------------
- Thank you for downloading the JDK(tm) 1.1.4 release.
-
- This is version 1.1.4 of the Java Development Kit, also known as
- JDK 1.1.4. The JDK is a development environment for writing
- applets and applications that conform to the Java 1.1 Core API.
- Its compiler and other tools are run from a shell and have no
- GUI interface. This version includes improvements in functionality,
- performance, and quality over JDK 1.0.2, and includes
- bug fixes since JDK 1.1.3.
-
- JDK 1.1.4 is a bug-fix release. Changes made to the JDK since
- the first 1.1 beta release are in the file named CHANGES.
-
- Because there are no API changes in bug-fix releases, we continue
- to refer to this platform as the Java Platform 1.1 (rather than 1.1.4).
- While bugs have been fixed in 1.1.4, the platform hasn't changed.
-
- The Java Platform 1.1 offers new capabilities: Internationalization,
- signed applets, JAR file format, AWT (window toolkit) enhancements,
- JavaBeans(tm) component model, networking enhancements, Math package for
- large numbers, Remote Method Invocation (RMI), Reflection, database
- connectivity (JDBC), new Java Native Interface, Object Serialization,
- Inner Classes, and performance enhancements.
-
- For further description of these features, see the "New Feature
- Summary" in the JDK documentation.
-
- As part of our ongoing effort to improve the quality of the JDK,
- we will continue to fix bugs and develop new features.
- In order to help us prioritize our bug-fixing effort, please submit
- any bugs you find as soon as possible, using the procedure described
- in the "Reporting Bugs" section below.
-
- The JDK is a product of Sun Microsystems, Inc.
- JavaSoft, an operating company of Sun, develops the JDK.
-
-
- -----------------------------------------------------------------------
- PURPOSE
- -----------------------------------------------------------------------
- The JDK allows you to:
-
- - Develop applets that will run in browsers supporting the
- Java Platform 1.1, such as HotJava version 1.0, and future
- versions of Netscape Navigator and Microsoft Internet Explorer.
-
- - Develop Java applications. Applications run without the
- need for a browser. (HotJava itself is a Java application.)
-
-
- -----------------------------------------------------------------------
- VERSION COMPATIBILITY
- -----------------------------------------------------------------------
- In general, any applet or application that ran in JDK 1.0.2 should
- run correctly in JDK 1.1.4. A failure to do so is a bug, except
- for a small number of cases where compatibility has had to be
- broken to close potential security holes, or fix implementation
- or design bugs.
-
- Of course, applets that depend on any new 1.1 APIs will not work on
- any browsers that support only 1.0.2, such as Internet Explorer 3.0,
- Netscape 3.0, and the alpha and pre-beta1 versions of the HotJava
- browser. However, in general, applets relying only on APIs defined
- in 1.0.2 (but compiled with the JDK 1.1 compiler) will run on 1.0.2
- browsers. This "downwards" compatibility has not been extensively
- tested and cannot be guaranteed.
-
- For more details, see the document on compatibility at:
-
- http://java.sun.com/products/jdk/1.1/compatibility.html
-
- If you find any such incompatibilities that are not listed on the
- Compatibility web page, please report them to us as noted below
- under "Reporting Bugs," and mention that they are compatibility
- bugs. Compatibility is critically important to us, and a cornerstone
- of the Java promise: Write Once, Run Anywhere(tm).
-
-
- -----------------------------------------------------------------------
- BUG FIXES
- -----------------------------------------------------------------------
- As with any release, we will continue vigorously testing and
- debugging the JDK. If we uncover any important bugs, we will
- post them on the JavaSoft web site at:
-
- http://java.sun.com/products/jdk/1.1/bugs.html
-
- As always, your comments and bug reports are important to making
- future releases successful. We will use your feedback to help plan
- future releases. Please report bugs, request features and submit
- comments using the procedure noted below in the sections "Submitting
- Comments" and "Reporting Bugs and Requesting Features".
-
-
- -----------------------------------------------------------------------
- WHAT THE JDK CONTAINS
- -----------------------------------------------------------------------
-
- JAVA RUNTIME ----------------------------------------------------------
-
- - Java Core Classes (classes.zip)
- DO NOT UNZIP THIS FILE! It must remain zipped for the
- compiler and interpreter to access the class files
- within it properly. This file contains all of the
- the compiled .class files for the JDK.
-
- JAVA SOURCE FILES -----------------------------------------------------
-
- - Java Source Files for Public Classes
- (src.zip file or src directory)
- This is the set of source files used to create the
- classes included in the Java Core Classes classes.zip
- file (above). These source files are provided for
- information purposes only, to help developers learn
- and use Java. They do not include the private
- java.* classes or the sun.* classes, and therefore
- cannot be compiled into a complete classes.zip file.
-
- Do not modify these classes; instead, create subclasses
- and override where you need to. These classes are
- documented in the API Reference documentation, which is
- generated by javadoc.
-
- How this is installed depends on the platform:
-
- - On Windows, these are automatically unzipped for you
- during installation.
-
- - On Solaris, you must unzip the src.zip file yourself.
- You can get a free copy of the correct version
- of unzip in source form (which you must compile) from:
-
- http://www.cdrom.com/pub/infozip/zlib/
-
- or
-
- ftp://ftp.cdrom.com/pub/infozip/zlib/
-
- or
-
- ftp://ftp.uu.net/pub/archiving/zip/UNIX/SUN/
-
- JAVA TOOLS ------------------------------------------------------------
-
- - Java Compiler (javac)
- Compiles programs written in the Java programming language
- into bytecodes.
-
- - Java Interpreter (java)
- Executes Java bytecodes. In other words, it runs
- programs written in the Java programming language.
-
- - Jave Runtime Interpreter (jre)
- Similar to the Java Interpreter (java), but intended for
- end users who do not require all the development-related
- options available with the java tool.
-
- - Java AppletViewer (appletviewer)
- Used for testing and running applets.
-
- - Java Debugger (jdb)
- Helps you find bugs in Java programs.
-
- - Class File Disassembler (javap)
- Disassembles compiled Java files and prints out a
- representation of the Java bytecodes.
-
- - Java Documentation Generator (javadoc)
- Parses the declarations and documentation comments in
- a set of Java source files and produces a set of HTML pages
- describing the public and protected classes, interfaces,
- constructors, methods, and fields. Also produces
- a class hierarchy and an index of all members.
-
- - C Header and Stub File Generator (javah)
- For attaching native methods to Java code.
-
- - Java Archive Tool (jar)
- Combines many Java class files and other resources
- into a single jar file.
-
- - Digital Signing Tool (javakey)
- Manages entities, including their keys, certificates,
- and the trust associated with them.
-
- - Native-To-ASCII Converter (native2ascii)
- Converts a native encoding file to an ascii
- file that includes the \udddd Unicode notation.
-
- - Java RMI Stub Converter (rmic)
- Generates objects from the names of compiled Java classes
- that contain remote object implementations.
-
- - Java Remote Object Registry (rmiregistry)
- Creates and starts a remote object registry on the
- specified port of the current host.
-
- - Serial Version Command (serialver)
- Returns the serialVersionUID for one or more classes
- in a form suitable for copying into an evolving class.
-
- - AWT 1.1 Conversion Tool (updateAWT)
- Included with the JDK AWT documentation,
- rather than in the bin directory.
- Updates deprecated 1.0 AWT names to new 1.1 AWT
- names (for Sun Solaris and UNIX systems, or Windows
- systems with the MKS toolkit).
-
- - Various C libraries and include files
-
- JAVA DOCUMENTATION AND DEMOS ------------------------------------------
-
- - demo directory
- awt-1.1 AWT demos
- i18n Internationalization demos
-
- Animator General-purpose animator
- ArcTest Test arc drawing and filling
- BarChart Simple bar-chart applet
- Blink Blinking, multicolored text
- CardTest Test card layout manager
- Clock Analog clock
- DitherTest Test image dithering
- DrawTest Draw points and lines
- Fractal Fractal figures
- GraphLayout Graph layout by iterated relaxation
- GraphicsTest Test graphics operations
- ImageMap Live-feedback image map
- JumpingBox Catch the jumping box
- MoleculeViewer Three-dimensional chemical model viewer
- NervousText Nervous text
- SimpleGraph Draw a simple graph
- SortDemo Animated sorting algorithms
- SpreadSheet Simple spreadsheet
- TicTacToe Tic-tac-toe game
- WireFrame Three-dimensional wire-frame model viewer
-
- RMI demos are available in the separately-downloadable
- JDK documentation. See the entry "Demonstration Applets
- and Applications" in the JDK documentation table of
- contents for access.
-
- - README
- This file you are currently reading
-
- - CHANGES
- Changes made in the beta and final JDK releases
-
- - COPYRIGHT
- Copyright notice for the JDK software
-
- - LICENSE
- License agreement for the JDK software
-
- NOTE: The JDK does NOT include a Web browser. To obtain the HotJava(tm)
- Browser, see the HotJava Browser web page:
-
- http://java.sun.com/products/hotjava/
-
-
- -----------------------------------------------------------------------
- WHERE TO FIND MORE INFORMATION
- -----------------------------------------------------------------------
- This README file and the accompanying CHANGES, LICENSE, COPYRIGHT files,
- demo directory, and Java source code (src.zip) are the only
- "documentation" included in this JDK software bundle.
-
- The rest of the documentation is in a separately-downloaded bundle
- known as the "JDK 1.1.4 Documentation," and is available from the same
- download page where you got this software:
-
- http://java.sun.com/products/jdk/1.1/
-
- This JDK 1.1.4 Documentation includes the following information:
-
- - JDK Release Notes
- - JDK API Reference
- - JDK Guide to New Features
- - JDK Demos
- - JDK Tools Documentation
- - Java Tutorial
-
-
- -----------------------------------------------------------------------
- SUBMITTING COMMENTS
- -----------------------------------------------------------------------
- We are very interested in receiving your comments and suggestions
- as early as possible.
-
- If you have a specific feature request or bug to report, please
- refer to the next section for how to submit it. Send other comments
- and informal suggestions directly to us at our JavaSoft email addresses
- at Sun, which are listed at:
-
- http://java.sun.com/mail/
-
- Here is a summary of what is on this web page:
-
- - Technical Help - Sun does not provide free technical help.
- See the above web page for some places to obtain help with your
- programming problems.
-
- - JavaSoft Email Addresses - The following are our most current
- email addresses as of this release. Use these for sending in
- comments and informal suggestions.
-
- java-intl@java.sun.com Internationalization
- java-awt@java.sun.com AWT package
- java-security@java.sun.com Security package
- java-io@java.sun.com IO package
- java-net@java.sun.com Net package
- jdbc@wombat.eng.sun.com JDBC package
- jdbc-odbc@wombat.eng.sun.com JDBC-ODBC bridge
- java-beans@java.sun.com Beans package
- reflection-comments@worthy.eng.sun.com Reflection package
- jni@java.sun.com Java Native Interface
-
- If your comment does not fall into any of those categories,
- please send it to:
-
- jdk-comments@java.sun.com General comments
-
- While we are not able to respond individually to each comment,
- we do review all comments.
-
-
- -----------------------------------------------------------------------
- REPORTING BUGS AND REQUESTING FEATURES
- -----------------------------------------------------------------------
- To report bugs or feature requests, go to this web page:
-
- http://java.sun.com/cgi-bin/bugreport.cgi
-
- This gives you instructions for checking if your bug is a duplicate
- by allowing you to look in our known bugs list. This also gives
- instructions for how to submit bugs and request features.
-
- Please be aware that bugs that you submit will not necessarily
- appear on the "Known Bugs" or "Fixed Bugs" pages, as we post
- only major bugs there.
-
- When submitting a bug, be sure you include the version number of
- the JDK you are running. You can get the version number of the JDK
- by executing:
-
- java -version
-
-
- -----------------------------------------------------------------------
- JAVABEANS(tm) AND THE BEANS DEVELOPMENT KIT
- -----------------------------------------------------------------------
- A version of the Beans Development Kit (BDK) is also available for
- immediate download from JavaSoft. BDK includes specific tools and
- support for JavaBeans developers such as the BeanBox test containers
- and example beans. See:
-
- http://java.sun.com/beans/bdk_download.html
-
- We will continue to ship the BDK in addition to the JDK.
- Updates to the BDK, tools, and general JavaBeans information
- will be posted on a regular basis to the JavaBeans web site:
-
- http://java.sun.com/beans
-
-
-
- =======================================================================
- INSTALLING AND RUNNING JAVA
- =======================================================================
-
- -----------------------------------------------------------------------
- INSTALLATION NOTES
- -----------------------------------------------------------------------
-
- IMPORTANT: Please make sure you understand the Copyright
- and License information (in the files named COPYRIGHT and
- LICENSE) before installing this release.
-
- The JDK 1.1.4 software and documentation are available in two separate
- downloadable compressed files, called "bundles". They need to be
- downloaded separately into the same directory and
- unpacked as follows for the few links between them to work.
-
- Here are the abbreviated instructions. (The installation procedure
- is different on different platforms, so these instructions are
- quite general.)
-
- 1. Go to the JDK Download page and download the software and
- documentation separately:
-
- http://java.sun.com/products/jdk/1.1/
-
- 2. Follow the installation instructions for your particular
- platform at:
-
- http://java.sun.com/products/jdk/1.1/installation-solaris2.html
-
- OR
-
- http://java.sun.com/products/jdk/1.1/installation-win32-x86.html
-
- 3. Unpack the software and documentation bundles according to the
- instructions on the web page given in step 2. You should end up
- with the directory structure shown below.
-
- 4. Set the PATH and CLASSPATH for Windows or Solaris as
- described in the section that follows.
-
- 5. Use a web browser to go to your new, local JDK documentation
- table of contents by opening the "index.html" file in the "docs"
- directory: jdk1.1/docs/index.html
-
-
- jdk1.1.4
- _________________________|_____________________________________
- | | | | | | | | | | |
- README CHANGES COPYRIGHT LICENSE bin lib include demo src docs index.html
- | | | | | |
- |
- _____________________________|_____
- | | | | |
- api tooldocs relnotes guide index.html
- | | | |
-
-
- The "src" directory shown above originally appears as a "src.zip"
- file in the Solaris installation, which you must manually unzip.
- On Windows, the installer automatically unzips it for you.
-
-
- -----------------------------------------------------------------------
- RUNNING JAVA TOOLS IN MICROSOFT WINDOWS
- -----------------------------------------------------------------------
-
- After installing the JDK software, you start a tool by typing its
- name into the DOS window with a filename as an argument. None of
- the main Java tools are Windows programs with GUI interfaces -- they
- are all run from the DOS command line. (For example, if you
- double-click on the Java Compiler "javac" icon, it will briefly
- open and immediately close a DOS window, because that is not the
- proper way to run it.)
-
- You can specify the path to a tool either by typing the path in
- front of the tool each time, or by adding the path to the
- startup file (autoexec.bat). For example, if the JDK is
- installed at C:\jdk1.1.4, to run the compiler on a file
- myfile.java, go to a DOS shell and execute this:
-
- Type: C:\jdk1.1.4\bin\javac myfile.java
-
- -or-
-
- Add C:\jdk1.1.4\bin to your path statement
- Type: javac myfile.java
-
- See the next section about setting the PATH and CLASSPATH variables.
-
- -----------------------------------------------------------------------
- MICROSOFT WINDOWS PATH and CLASSPATH
- -----------------------------------------------------------------------
-
- The CLASSPATH is not required, but if it is set, it will need to be
- unset. You may want to update the "path" variable for convenience.
-
- Developing in JDK 1.0.2 and 1.1.4 - If you want
- to develop in both JDK 1.0.2 and JDK 1.1.4, you must
- set CLASSPATH (and PATH) separately for each one.
- To run both versions simultaneously, you can run
- each one from its own DOS window. If you are running
- only one at a time, you can write a batch script to
- switch the value of CLASSPATH (and PATH).
-
- Windows NT only - If you are using Windows NT, it is
- preferable to make the following environment variable
- changes in the Control Panel. Start the Control Panel,
- select System, then edit the environment variables.
-
- 1. PATH - Add the absolute path of the "jdk1.1.4\bin"
- directory to your PATH statement as follows.
-
- The PATH statement enables Windows to find the executables
- (javac, java, javadoc, etc.) from any current directory.
-
- To find out the current value of your PATH, at the
- DOS prompt type:
-
- C:\> path
-
- To change the PATH, open the AUTOEXEC.BAT file and make the
- change to the PATH statement. To edit the AUTOEXEC.BAT
- file in Windows 95:
-
- i. Start a text editor by choosing "Start", "Programs",
- "Accessories", and choosing WordPad or NotePad.
- ii. Choose Open from the File menu and type "c:\autoexec.bat"
- for the filename This will open the file for editing.
- iii. Look for the PATH statement. Notice that the PATH statement
- is a series of directories separated by semi-colons (;).
- Windows looks for programs in the PATH directories in order,
- from left to right. Look for other JDK versions in the PATH.
- There should only be one path to a classes.zip file.
- When in doubt, put the java directory at the end of
- the path statement. For example, in the following PATH
- statement, we have added the java directory at the end:
-
- PATH C:\WINDOWS;C:\WINDOWS\COMMAND;C:\;C:\DOS;C:\JDK1.1.4\BIN
-
- To make the path take effect, execute the following:
-
- C:\> autoexec.bat
-
-
- 2. CLASSPATH Environment Variable - If you follow the default
- installation, you do not need to set CLASSPATH, because the
- tools automatically set it for you. (This was actually
- also true in all beta versions and the final version of
- JDK 1.1, but was undocumented.) If your CLASSPATH has
- not previously been set, you can skip this step.
-
- UNSETTING CLASSPATH
-
- If you have previously set the CLASSPATH and want to
- unset it, you normally need to change the current value
- (at the command line) and the startup value (in a startup
- file or script). For example, to see if it is currently
- set, type:
-
- % set
-
- This lists all of the environment variables. CLASSPATH
- will not appear if it is not set.
-
- If it is set, you can unset the current value by setting
- it to no value:
-
- % set CLASSPATH=
-
- Also open your startup file (autoexec.bat) or script and
- remove the path to the JDK classes from the CLASSPATH
- environment variable, if you want the change to be
- permanent.
-
- WHAT CLASSPATH DOES
-
- The CLASSPATH tells the Java Virtual Machine and other Java
- applications (which are located in the "jdk1.1.4\bin"
- directory) where to find the class libraries, such as
- classes.zip file (which is in the lib directory).
- By default, the java tools temporarily append the
- following to whatever CLASSPATH you have explicitly
- set in your startup file:
-
- .;[bin]\..\classes;[bin]\..\lib\classes.zip
-
- where [bin] is substituted by the absolute path to the
- jdk1.1\bin directory. Therefore, if you keep the bin and
- lib directories at the same directory level (that is, if
- they have a common parent directory), the Java executables
- will find the classes. You need to set the CLASSPATH only
- if you move classes.zip or want to load a different library
- (such as one you develop).
-
- Refer to the Windows Installation Troubleshooting section below
- if you have problems running the JDK.
-
-
- -----------------------------------------------------------------------
- MICROSOFT WINDOWS INSTALLATION TROUBLESHOOTING
- -----------------------------------------------------------------------
-
- Here are four troubleshooting tips for Microsoft Windows.
-
- * If you see the following error message
-
- net.socketException: errno = 10047
-
- -or-
-
- Unsupported version of Windows Socket API
-
- check which TCP/IP drivers you have installed. The AppletViewer
- supports only the Microsoft TCP/IP drivers included with
- Windows 95. If you are using third-party drivers (e.g.,
- Trumpet Winsock), you'll need to change over to the native
- Microsoft TCP/IP drivers if you want to load applets over the
- network.
-
- * If the AppletViewer does not load applets then you might
- try the following:
-
- 1. set HOMEDRIVE=c:
- set HOMEPATH=\
- and restart the AppletViewer (in the same DOS box)
-
- 2. set HOME=c:\
- and restart the AppletViewer (in the same DOS box)
-
- If none of these work, try:
-
- java -verbose sun.applet.AppletViewer
-
- This lists the classes that are being loaded. From this output,
- you can determine which class the AppletViewer is trying to
- load and where it's trying to load it from. Check to make sure
- that the class exists and is not corrupted in some way.
-
- * Error Message: "Exception in thread NULL"
- or "Unable to initialize threads: cannot find class
- java/lang/Thread" (yes, with forward slashes)
-
- If you are getting one of these fatal error messages
- when running java, javac, or appetviewer, you should check
- your CLASSPATH environment variable. It may list
- "c:\java" or the "classes" directory from an older
- JDK release. You can either unset the CLASSPATH variable,
- or set it to include only the latest version of the JDK class
- library. For example:
-
- C:\> set CLASSPATH=.;C:\jdk1.1.4\lib\classes.zip
-
- This will make sure that you are using the correct classes
- for this release.
-
- * Cannot close AppletViewer copyright window (Windows 95 only)
- In Microsoft Windows 95, the launch bar may partially cover
- the AppletViewer copyright notice window Accept and Reject
- buttons. If this happens, you can move the Windows 95
- launch bar to the side of the desktop to allow access to
- the copyright window Accept and Reject buttons.
-
-
- -----------------------------------------------------------------------
- RUNNING JAVA TOOLS IN SOLARIS
- -----------------------------------------------------------------------
-
- After installing the JDK software, you start a tool by typing its
- name into a shell window with a filename as an argument. You can
- specify the path to a tool either by typing the path in front of
- the tool each time, or by adding the path to the startup file.
- For example, if the JDK is installed at /usr/local/jdk1.1.4,
- to run the complier on a file myfile.java, go to a shell and execute:
-
- Type: /usr/local/jdk1.1.4/bin/javac myfile.java
-
- -or-
-
- Add /usr/local/jdk1.1.4/bin to your path statement
- Type: javac myfile.java
-
- The path and CLASSPATH variables are not required, but it is helpful
- to know more about them. See the next section about setting these
- variables.
-
-
- -----------------------------------------------------------------------
- SOLARIS PATH and CLASSPATH
- -----------------------------------------------------------------------
-
- The CLASSPATH is not required, but if it is set, it will need to be
- unset. You may want to update the "path" variable for convenience.
-
- NOTE - If you want to develop in both JDK 1.0.2 and
- JDK 1.1.4, you must set CLASSPATH (and path) separately
- for each one. To run both versions simultaneously, you
- can run each one from its own shell window. If you are
- running only one at a time, you can write a batch script
- to switch the value of CLASSPATH (and PATH).
-
- 1. Path Variable - Add the absolute path of the "jdk1.1.4/bin"
- directory to your Unix path variable, as follows.
-
- The path variable enables Solaris to find the executables
- (javac, java, javadoc, etc.) from any current directory.
- To find out if the path is currently set for any java tools,
- execute:
-
- % which java
-
- This will print the path to java, if it can find it.
-
- If you use the C shell (csh), you can set the path in
- your startup file (~/.cshrc) as follows, for example:
-
- set path=($path /usr/local/jdk1.1.4/bin)
-
- Then load the startup file and verify that the path
- is set by repeating the "which" command above:
-
- % source ~/.cshrc
- % which java
-
- 2. CLASSPATH Environment Variable - If you follow the default
- installation, you do not need to set CLASSPATH, because the
- shell scripts automatically set it for you. (This was actually
- also true in all beta versions and the final version of
- JDK 1.1, but was undocumented.) If your CLASSPATH has
- not previously been set, you can skip this step.
-
-
- If you want to develop in both JDK 1.0.2 and JDK 1.1.4,
- you must set CLASSPATH separately for each one. To run
- both simultaneously, run each one in its own DOS window.
- If you are running only one at a time, you can write a batch
- script to switch the value of CLASSPATH.
-
- UNSETTING CLASSPATH
-
- If you have previously set the CLASSPATH and want to
- unset it, you normally need to change the current value
- (at the command line) and the startup value (in a startup
- file or script). For example, to see if it is currently
- set, type:
-
- % echo $CLASSPATH
-
- If it is set, you can unset the current value by typing:
-
- % unsetenv CLASSPATH
-
- Also open your startup file (~/.cshrc) or script and
- remove the path to the JDK classes from the CLASSPATH
- environment variable if you want the change to be
- permanent.
-
- WHAT CLASSPATH DOES
-
- The CLASSPATH tells the Java Virtual Machine and other Java
- applications (which are located in the "jdk1.1.4/bin" directory)
- where to find the class libraries, such as classes.zip file
- (which is in the lib directory). By default, the java tools
- temporarily append the following to whatever CLASSPATH
- you have explicitly set in your startup file:
-
- .:[bin]/../classes:[bin]/../lib/classes.zip
-
- where [bin] is substituted by the absolute path to the
- jdk1.1/bin directory. Therefore, if you keep the bin and
- lib directories at the same directory level (that is, if
- they have a common parent directory), the Java executables
- will find the classes. You need to set the CLASSPATH only
- if you move classes.zip or want to load a different library
- (such as one you develop).
-
- Refer to the Solaris Installation Troubleshooting section below
- if you have problems running the JDK.
-
- -----------------------------------------------------------------------
- SOLARIS INSTALLATION TROUBLESHOOTING
- -----------------------------------------------------------------------
-
- * Error Message: "Exception in thread NULL"
- or "Unable to initialize threads: cannot find class java/lang/Thread"
-
- If you are getting one of these fatal error messages
- when running java, javac, or appetviewer, you should check
- your CLASSPATH environment variable. It may list
- "java" or the "classes" directory from an older
- JDK release. You can either unset the CLASSPATH variable,
- or set it to include only the latest version of the JDK class
- library. For example:
-
- % setenv CLASSPATH .:/usr/local/jdk1.1.4/lib/classes.zip
-
- This will ensure that you are using the correct classes for
- this release.
-
-
- -----------------------------------------------------------------------
- RUNNING APPLETS WITH THE APPLETVIEWER
- -----------------------------------------------------------------------
- AppletViewer allows you to run one or more Java applets that are
- called by reference in a web page (HTML file) using the APPLET tag.
- The AppletViewer finds the APPLET tags in the HTML file and runs
- the applets (in separate windows) as specified by the tags.
-
- AppletViewer is for viewing applets. It cannot display an entire
- web page that contains many HTML tags. It parses only the APPLET
- tag and no other HTML on the web page.
-
- To run an applet with appletviewer, you go to a command line for
- your operating system and run appletviewer, passing in the filename
- or URL of the web page as its argument.
- _______
- SOLARIS
-
- Here is an example of how to invoke AppletViewer on a file-based
- web page in Solaris. First change to the "jdk1.1.4" directory.
- Then execute:
-
- bin/appletviewer demo/GraphLayout/example1.html
-
- Here is an example of how to invoke AppletViewer on a URL-based
- web page in Solaris. Execute:
-
- bin/appletviewer http://java.sun.com/applets/NervousText/example1.html
- _______
- WINDOWS
- Here is an example of how to invoke AppletViewer on a file-based
- web page in Windows. Go to a DOS prompt, change to the "jdk1.1.4"
- directory and then execute:
-
- bin\appletviewer demo\GraphLayout\example1.html
-
- Here is an example of how to invoke AppletViewer on a URL-based
- web page in Windows. Execute:
-
- bin\appletviewer http://java.sun.com/applets/NervousText/example1.html
-
- -----------------------------------------------------------------------
- DEBUGGING PROGRAMS WITH THE JAVA DEBUGGER (JDB)
- -----------------------------------------------------------------------
- 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/1.1/debugging/
-
-
- -----------------------------------------------------------------------
- Copyright ╗ 1996,1997 Sun Microsystems, Inc.
- 901 San Antonio Rd., Palo Alto, CA 94303 USA
- All rights reserved.
-
-