java-programmer >>RMI between Java 1.4 and Java 1.5 problem

RMI between Java 1.4 and Java 1.5 problem

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    >On Wed, 30 Apr 2008 08:00:38 -0700 (PDT), Isaac Gouy
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    >Why don't you go through all...
    
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    >
    > I can make the square x, y be represented as an integer 0..N * N - 1
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    > So I create a 2D array [N*N][x] of longs which will represent the sum of the
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    You got it. There is an optimization that reduces the memory cost,
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    memory as the number of moves increases.
    
    > Hey thanks everyone. This is more than just a single problem or some points
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    > this, and becoming a better programmer - and that is important to me.
    > Learning new abstract concepts, and having exciting revelations is actually
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    exporter of india
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    regards
    
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    Suggest Your Friends to Use - FREE Trial - No Obligation 7 Days Google =
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    Start Getting Leads within 24 Hours for Your Products/Services
    http://www.yesiwillbuy.com/free-trial.htm?Chetna =20
    Jan16-08
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    test.java:8: '{' expected
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    D:\j2sdk1.4.2_04\bin>
    
    my book tell me it would work well, what's wrong?
    --
    Your fault as a Government is My failure as a Citizen.
- 16
  - remote databaseHello!
    
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Author

Message

nickmphillips

Posted: 2005-3-22 17:14:00

Top

java-programmer, RMI between Java 1.4 and Java 1.5 problem When attempting to RMI between a 1.4 client and a 1.5 server ( with a
1.5 interface, remote object, stubs and skeletons using the -vcompat
rmic flag ), I get the following error:

java.lang.ClassNotFoundException:
java.rmi.server.RemoteObjectInvocation
Handler (no security manager: RMI class loader disabled)

The plot thickens. The 1.4 client will connect to the 1.5 server if I
run the 1.4 client classes in a 1.5 jvm. However, when I run the 1.4
compiled classes in a 1.4 jvm I get no joy.

Any ideas anyone?

The context is this: getting a Java strored procedure in an Oracle
database running a 1.4 jvm to send "trigger" information to a java
1.5 server on a different machine.

BTW, the rmi interface is very simple. One method, no return type and
the only passed parameter is a string.

Esmond Pitt

Posted: 2005-3-23 7:48:00

Top

java-programmer >> RMI between Java 1.4 and Java 1.5 problem Fran Cottone wrote:
> When attempting to RMI between a 1.4 client and a 1.5 server ( with a
> 1.5 interface, remote object, stubs and skeletons using the -vcompat
> rmic flag ), I get the following error:
>
> java.lang.ClassNotFoundException:
> java.rmi.server.RemoteObjectInvocation
> Handler (no security manager: RMI class loader disabled)
>
> The plot thickens. The 1.4 client will connect to the 1.5 server if I
> run the 1.4 client classes in a 1.5 jvm. However, when I run the 1.4
> compiled classes in a 1.4 jvm I get no joy.

You are running your server classes in a 1.5 JVM and they are exporting
stubs based on RemoteObjectInvocationHandler because you haven't
compiled the stubs with rmic. If you want to interoperate with <= 1.4
clients you must provide stubs. RemoteObjectInvocationHandler is a 1.5-ism.

EJP

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    jCheckBox1 = new JCheckBox();
    jPanel6.add(jCheckBox1);
    jCheckBox1.setText("Abtastungspunkte");
    }
    }
    {
    jPanel9 = new JPanel();
    jPanel4.add(jPanel9, BorderLayout.CENTER);
    //jPanel9
    // .setPreferredSize(new java.awt.Dimension(202, 53));
    {
    jLabel3 = new JLabel();
    jPanel9.add(jLabel3);
    jLabel3.setText("Abtasttheorem ist erf黮lt");
    }
    {
    OK = new JButton();
    jPanel9.add(OK);
    OK.setText("Reset");
    }
    }
    {
    jPanel5 = new JPanel();
    jPanel4.add(jPanel5, BorderLayout.WEST);
    }
    jPanel1.add(jPanel4, BorderLayout.EAST);
    }
    }
    } catch (Exception e) {
    e.printStackTrace();
    }
    }
    
    }
- 9
  - Java Parallel Port Programming with the Java Communications APII've read some messages on here regarding the Java Communications API
    and the problems some have had with writing to parallel ports. I also
    was puzzled by why I couldn't get this to work and then finally
    figured out something that worked for me so am sharing this.
    
    First of all, I am using Linux, downloaded the RXTX software,
    downloaded the Sun x86/Solaris drivers for the Comm API (yes you need
    this even for Windows/Linux), and installed per the instructions.
    There were a few snags but the instructions contain much of what you
    need to get past these.
    
    The main problem I had was with properly wiring the cable from the
    parallel port to drive my external circuits. You definately need some
    sort of buffer chips to provide the interface from/to the parallel
    port and your external devices (i.e. motors, LEDs, etc) and of course
    power that circuit with an external 5V supply. That wasn't the problem
    for me though. I had my data lines from the parallel port connected to
    drive the external device...but it wasn't working with the Java
    Communications API.
    
    After some more tinkering, the trick was to tie the parallel port
    status lines 10 & 11 (Ack and Busy) to low/ground and lines 12, 13, &
    15 (paper out, select, & error) to high/5V. This should be done
    through the output of a buffer chip though. I also tied lines 18-25 to
    low/ground.
    
    With that, the Java Communications API worked like a charm. The OS and
    driver software must cleary require that the status input lines be
    broadcasting signals that indicate the external device is OK...and by
    tying the status lines mentioned to the proper signal levels...it
    looks as if the external device is OK (i.e. no errors, not busy, has
    paper, etc).
    
    Previously, I had the status lines all tied to ground or had them
    floating. After looking at a parallel port spec, I figured out what
    the status lines are signalling to the system.
    
    I hope this helps some of you trying to do something similar.
    
    Regards,
    
    Paul
    
    /******************************************************************/
    Paul J. Perrone
    Assured Technologies, Inc.
    Web: www.assuredtech.com
    Author of various books on J2EE, Java, XML, and Web
    Services: http://www.assuredtech.com/books_page.htm
    Recently completed project includes the
    "J2EE Developer's Handbook" geared for J2EE v1.4.
    /******************************************************************/
- 10
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    The NTSB's update outlined factual information about the crash, but did not conclude what the probable cause of the crash was. The full board will likely vote on a ruling at a later date.
    Funeral services were also scheduled over the next several days for firefighters Jess McLean, 27, of Beaumont; Daniel Hoover-Najera, 20, of San Jacinto; Mark Loutzenhiser, 43, of Idyllwild; and Pablo Cerda, 23, of Fountain Valley. A public memorial service for all five men was planned for Sunday.
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    The National Transportation Safety Board said the wind, coupled with the pilot's inability to turn sharply, forced the aircraft away from its intended path over the East River and into the building.
- 11
  - JToggleButton dimension on ToolBar?I have added (besides normal buttons with icons (for example "open
    folder") JToggleButton buttons with text on them.
    I'm not able:
    1. to give jtogglebutton buttons the same dimension, that is fitted to
    the text;
    2. to make that when one is selected, it stays pressed too.
    
    Thanks for every advice.
    Regards.
    Marcello.
- 12
  - java assembler pjb[[[ Google probably will join this post to the 2003-01-03 thread of
    the same name, your newsreader may be less helpful. ]]]
    
    Kindly offline I was asked to confirm ...
    
    Yes, instructions appear at:
    http://groups.google.com/groups?threadm=2695edf1.0301031438.6fb5cd8%40posting.google.com
    
    Yes I can fetch 48,910 bytes from:
    http://members.aol.com/plforth/pjb.zip
    
    Yes that .zip contains the compressed folder pjb/.
    
    pjb/README.txt tells us nothing new except that I am
    mailto:email***@***.com and we can click thru to pjb/cshlog.txt. In
    turn, pjb/cshlog.txt suggests ..
    
    Three steps:
    
    --- 1) a procedure to produce the disassembly
    HelloWorldAppJavaAssembler.java:
    
    cd pjb
    javac HelloWorldApp.java pjb/JavaAssembler.java
    cp -ip HelloWorldApp.class HelloWorldApp.bin
    java pjb.JavaAssembler HelloWorldApp
    
    --- 2) A procedure to reassemble the disassembly:
    
    javac HelloWorldAppJavaAssembler.java
    rm HelloWorldApp.class
    java HelloWorldAppJavaAssembler
    
    --- 3) A comparison to show we have reassembled precisely the same
    .class file:
    
    diff HelloWorldApp.bin HelloWorldApp.class
    
    Pat LaVarre
    
    P.S. I ran this example in Mac OS X, with ships with javac installed,
    even if you do not install the Developer's Disk. Linux with Java
    should work identically. Windows with Java syntax for these is as
    shown except `copy /-y` and `del` and `fc /b` for what here appears as
    `cp -ip` and `rm` and `diff`.
- 13
  - import Tidy jar, path to jarI can't pin down why I think this, but I believe there's a mismatch
    between where the build file says to find Tidy.jar and "import
    org.w3c.tidy.Tidy;" from Test16.java, line 9. data:
    
    [thufir@localhost java]$
    [thufir@localhost java]$ ll lib/
    total 184
    -rw-rw-r-- 1 thufir thufir 177868 Aug 1 2001 Tidy.jar
    [thufir@localhost java]$
    [thufir@localhost java]$ ant
    Buildfile: build.xml
    
    clean:
    [delete] Deleting directory /home/thufir/java/bin
    
    prepare:
    [mkdir] Created dir: /home/thufir/java/bin
    
    compile:
    [javac] Compiling 1 source file to /home/thufir/java/bin
    [javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:9:
    package
    org.w3c.tidy does not exist
    [javac] import org.w3c.tidy.Tidy;
    [javac] ^
    [javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:38:
    cannot find
    symbol
    [javac] symbol : class Tidy
    [javac] location: class atreides.tidyXhtml.Test16
    [javac] Tidy tidy = new Tidy();
    [javac] ^
    [javac] /home/thufir/java/src/atreides/tidyXhtml/Test16.java:38:
    cannot find
    symbol
    [javac] symbol : class Tidy
    [javac] location: class atreides.tidyXhtml.Test16
    [javac] Tidy tidy = new Tidy();
    [javac] ^
    [javac] 3 errors
    
    BUILD FAILED
    /home/thufir/java/build.xml:18: Compile failed; see the compiler error
    output for
    details.
    
    Total time: 4 seconds
    [thufir@localhost java]$ cat build.xml
    <project name="XHTML" default="package">
    
    <import file="properties.tidy.xml" />
    
    <target name="clean">
    <delete dir="${outputDir}" />
    </target>
    
    <target name="prepare" depends="clean">
    <mkdir dir="${outputDir}" />
    </target>
    
    <target name="compile" depends="prepare">
    <javac
    srcdir = "${sourceDir}"
    destdir = "${outputDir}"
    classpath = "${tidy.classpath}"
    />
    </target>
    
    <target name="package" depends="compile">
    <jar jarfile="${outputDir}/${mainClass}.jar"
    basedir="${outputDir}"
    >
    <manifest>
    <attribute name="Main-Class"
    value="${pkgPath}${mainClass}"/>
    </manifest>
    </jar>
    </target>
    
    </project>
    [thufir@localhost java]$ cat properties.tidy.xml
    <project name="properties">
    <property name="outputDir" value="bin/" />
    <property name="sourceDir" value="src/atreides/tidyXhtml/"
    />
    <property name="mainClass" value="Test16" />
    <property name="pkgPath" value="atreides.tidyXhtml." />
    <property name="user.name" value="thufir" />
    <path id="tidy.classpath">
    <pathelement path="lib/Tidy.jar" />
    </path>
    </project>
    [thufir@localhost java]$
    
    thanks,
    
    Thufir
- 14
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- 15
  - ** new open source requirements management tool **Hi,
    
    OSRMT v1.1 has been released free under GPL for design
    control/requirements engineering:
    
    - custom forms to enter product features, requirements, use cases, test
    cases, design etc.
    - arrange all of these 'artifacts' within a hierarchal tree
    - create dependencies between artifact e.g. feature a --> requirement b
    --> source code c,d,e
    - traceability matrix, identify artifacts not traced
    - generate a dependency graph showing the impact of changing an
    artifact (upward/downward)
    - attach binary files or insert links to files or URLs with each
    artifact
    - customize the reference with artifact type specific priorities,
    status, version etc.
    - enter low level details to artifacts e.g. use case steps, data
    fields, test steps etc.
    - track entire history of change to artifact
    - environment specific username and hashed password
    - database independence - Oracle, MySQL, SQL Server, MS Access scripts
    supplied
    - configure client to connect to database direct or full blown J2EE
    (client connects to JBoss)
    - Rich Swing client runs anywhere (web client or run client over HTTP
    in the future)
    - Import/export artifacts from/to XML
    - Technologies used include JGoodies (forms), JGraph (dependency tree),
    Jakarta (db connection pooling), Rhino (custom scripting
    forms/reports), Jasper (reports)
    
    We welcome your review, comments, questions and requests for new
    features.
    
    You can download the latest release at http://www.osrmt.com
    
    thanks!
    
    Aron Smith
    
    Fast, free requirements customized your way!