| Getting JAVA_HOME at runtime |
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Index ‹ java-programmer
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- 5
- UK Postcodes anyone know of a service ?Hi
My latest web application provides a search facility.
You sign up as a member and get a free entry in a searchable database.
I would like to offer a postcode search so that if someone is looking for a
particular service they can enter a postcode and return results within a number
of miles of the input postcode(s). I have seen this sort of search on a number
of sites to date and I was wondering if anyone knows of a web service or other
online service that will accept a post code (and some other params of course)
and return a list of postcodes within a parameters distance.
Once I have the list I can search my own database for results.
The service must be available over the network, I'm not intetested in static
databases that I have to install on the server (well I might be if they were
FREE :-).
Has anyone implemented such a thing ?
Does anyone know of such a service ?
Has this got anything to do with the group ? well I suppose not other than I
write in Java.
Cheers
anyway
Duncan
"Process- How will the work and the team be organized?
The team needs to fit the culture in which it will operate,
but you should write software well rather than preserve the
irrationality of an enclosing culture" - Kent Beck
- 5
- importing classs without package in JSP ?Hi,
i am working on apache server web based project and i want to import a
class without package in my JSP file.
All my classes are in "WEB-INF/classes"
if i use a package (such as "project") in a class (such as "match" )
then i can import class "match" in jsp using
<%@ page import="
java.util.*,
project.*
"%>
But if i dont have package then i dont know how to import my class in
JSP. Thats what i want to know .
PLease help me. i am really thankful to you guys.
Sincerely,
Jeff
- 7
- How Can I put XSL tag inside HTML form tag?Hello Dudes,
Sorry I couldn't find a XML/XSL group
I can only post these groups close to my subject.
In JSP (Java Server Page) you can do something
like this
<%
String v = myBean.getValue();
%>
<form .... >
<input name="myTag" value="<%= v %>">
</form>
You can do the similar thing in PHP.
But when I try in XSL I got error.
I have an XML file
<myTag attribute1="value1" />
Now I want to transform it into HTML form tag used XSL template
But XSL doesn't like this
<input name="myTag" value='
<xsl:value-of select="@attribute1" />
'></input>
How can I solve this problem?
Thank Q very much in advance!
- 7
- JSplitPane/JScrollPane Problem?Hey,
I'm writing an interface that has a verticle split pane, the top
and bottom of which both contain JScrollPanes with JEditor panes inside
each scrollpane. It sits within a JTabbedPane which is in a
JInternalFrame on a JDesktopPane.
JDesktopPane --> JTabbedPane --> Tab --> JSplitPane --> 2 ScrollPanes
--> 2 JEditorPanes.
The first EditorPane is a source area and the second is an error
output area. It's been working fine for me, which makes my current
dilema even worse.
I need to do the same format of error for an output tab so that
the output area is on top and the error output is on bottom. I took
the code from the previous working implementation and ported it and for
some reason it didn't work. The top component JScrollPane-->
JEditorPane does not show, but the bottom one does. Also, if I just
add the JScrollPane instead of the JSplitPane to the tab, it still
doesn't show, leading me to believe that it is a problem with the
implementation of the JScrollPane. Here are the code snippets of the
working and non-working portions of my code.
-----Working-----
source = new JEditorPane();
sourceError = new JEditorPane();
sourceError.setEditable(false);
JScrollPane scrollPane = new JScrollPane(source,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.setBorder(BorderFactory.createEmptyBorder());
JScrollPane errorScrollPane = new
JScrollPane(sourceError);
errorScrollPane.setBorder(BorderFactory.createEmptyBorder());
sourceSplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
scrollPane,
errorScrollPane);
sourceSplit.setBorder(BorderFactory.createEmptyBorder());
-----Not Working-----
expressionOut = new JEditorPane();
outputError = new JEditorPane();
expressionOut.setEditable(false);
outputError.setEditable(false);
JScrollPane outputScroller = new
JScrollPane(expressionOut,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
outputScroller.setBorder(BorderFactory.createEmptyBorder());
JScrollPane outErrorScroller = new
JScrollPane(outputError);
outErrorScroller.setBorder(BorderFactory.createEmptyBorder());
sourceSplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
outputScroller, outErrorScroller);
outputSplit.setBorder(BorderFactory.createEmptyBorder());
-----How They Are Added-----
tabFrame.addTab("Source", sourceSplit);
tabFrame.addTab("Output", outputSplit);
---------------
Any Ideas on why it isn't showing expressionOut?
- 8
- empty interfaces via reflectionOn Oct 14, 12:17 pm, "Aryeh M. Friedman" <email***@***.com>
wrote:
> On Oct 14, 6:01 pm, Steven Simpson <email***@***.com> wrote:
>
>
>
> > Aryeh M. Friedman wrote:
> > > Then how do you handle the return type?!?!?!? Namely I can't do:
>
> > > Class<?> testClass = loadTestClass();
> > > Object testInstance = testClass.newInstance();
> > > Result res=new Result();
>
> > > for (Method method: testClass.getDeclaredMethods())
> > > res.merge((Result) method.invoke(testInstance, new
> > > Object[0])); // cast exception
>
> > > The reason why it is not possible is any Result object created by a
> > > test is <MyClassLoader>.Result and all the results here are
> > > <SystemClassLoader>.Result
>
> > Looking back at an earlier post, your custom MyClassLoader goes like this:
>
> > > public class MyClassLoader extends ClassLoader
> > > {
> > > public Class loadClass(String name)
> > > {
> > > try {
> > > if(name.startsWith("java."))
> > > return super.loadClass(name);
>
> > A custom ClassLoader is expected to override findClass(String) rather
> > than loadClass(String), as the latter (indirectly) accomplishes this
> > behaviour:
>
> > <http://java.sun.com/javase/6/docs/api/java/lang/ClassLoader.html>
>
> > "When requested to find a class or resource, a ClassLoader instance will
> > delegate the search for the class or resource to its parent class loader
> > before attempting to find the class or resource itself."
>
> > MyClassLoader is loading Result instead of delegating to its parent
> > first, which should always find it first.
>
> I just tested:import java.io.*;
> import java.lang.reflect.*;
>
> public class MyClassLoader extends ClassLoader
> {
> public Class findClass(String name)
> {
> try {
> //if(name.startsWith("java."))
> // return super.loadClass(name);
>
> FileInputStream fis=new FileInputStream(name
> +".class");
> byte[] b=new byte[fis.available()];
>
> fis.read(b);
> fis.close();
>
> return defineClass(name,b,0,b.length);
> } catch(Throwable e) {
> e.printStackTrace();
> }
>
> return null;
>
> }
>
> and now the class loader no longer honors recompiled classes:
>
> Script started on Sun Oct 14 15:09:05 2007
> jtest@monster:/home/jtest% java Main
> 1
> ^Z
> Suspended
> jtest@monster:/home/jtest% cat foo
> import java.lang.reflect.*;
>
> public class MyClass
> {
> public MyClass()
> {
> ack=new Integer(2);
> }
>
> public Integer getAck()
> {
> return ack;
> }
>
> private int foo;
> private Integer ack;}
>
> jtest@monster:/home/jtest% cp foo MyClass.java
> jtest@monster:/home/jtest% javac MyClass.java
> jtest@monster:/home/jtest% fg
> java Main
>
> 1
> ^C
> jtest@monster:/home/jtest% exit
> Script ends on Sun Oct 14 15:09:45 2007
>
> Just for ref here is the new main():
>
> public class Main
> {
> public static void main(String[] args)
> throws Throwable
> {
> while(true) {
> ClassLoader loader=new MyClassLoader();
> Class klass=loader.loadClass("MyClass");
>
> MyClass m=(MyClass) klass.newInstance();
>
> System.out.println(m.getAck());
> System.in.read();
> }
> }
>
> }
You should simply use UrlClassLoader and have the system classpath not
include your code that needs to be reloaded, and the URLClassLoader
have the path that DOES need to be reloaded (creating a new instance
of that class loader every time you need to reload the class)
That way, Result will be properly loaded by the System class loader,
and your reloadable class wont.
Hoep this helps,
Daniel.
- 8
- java.sql.SQLException: ORA-00020: maximum number of processes (100) exceededHello Friends,
I am getting the following error.
java.sql.SQLException: ORA-00020: maximum number of processes (100)
exceeded
I am closing all my resultsets and all my connections in the try
block.
should i close ResultSets and Connections in the catch block aswell?.
or the problem is due to the connection pool settings in weblogic or
on the oracle side instead of in my application.
Thanks in Advance
s
- 8
- AspectJ: solution to Java's repetitiveness?thufir wrote:
> On Sat, 26 Apr 2008 06:51:43 -0400, Lew wrote:
>
>>> attrib_writer :foo, :bar #getter and setter for foo and bar attributes,
>>> #getter setter methods aren't actually written
>> Well, Java cannot do that because it's not in the language definition
>> and because the colon character already serves three other purposes in
>> Java.
>
> That Ruby syntax doesn't work in Java isn't the point at all.
>
>> I would just go with getters/setters. What's the big deal? My IDEs
>> generate them for me, so there's no typing, and it sure helps
>> maintainers to see them.
>>
>> It would be a huge waste of energy to retrofit Java with such a feature.
>
> The point is that getter/setter methods are boilerplate. Adding such a
> feature to Java would be worth it, and Java is constantly in flux.
>
>
> -Thufir
Can't you just add a (custom) annotation, e.g. "@JavaBean", and use
apt to generate the getters/setters? (Or possibly the newer
javax.annotation* stuff?) You could add options to such an
annotation e.g., read-only.
Then add the one extra line in your ant script to build code.
Note JavaEE defines many such annotations, including for an
MX Bean. Adding a standard annotation "@JavaBean" doesn't seem
like it would be that much effort, for a large convenience payoff.
<waffle>
Like Lew I use an IDE that does that for me. Still, I don't like
dependencies on particular tools that provide special features, if
the language could easily support them with little effort.
OTOH as others have pointed out in previous threads, the JavaBean
spec is rarely used, so maybe adding more standard annotations
isn't worth it.
If the OP thinks it should be used, create or modify a JSR for this
feature; if enough others agree it will be added.
</waffle>
-Wayne
- 10
- CVS checkout doesn't work in Eclipse v3.0.1Hi,
Since the CVS functionality of NetBeans doesn't appear to work for
me, I'm trying Eclipse. However, the CVS functionality of Eclipse
doesn't appear to work either. When I try to do a CVS checkout in
Eclipse, a "project" does get created in my workspace, but the
contents of the CVS modules aren't actually in the project. Now, the
contents of the module are only directories to this point, because I
was looking to work on the module with Eclipse. Should this be a
problem? Should I add a least one file to the project before Eclipse
will properly checkout the module with all its subdirectories?
Thanks,
Jason
- 10
- The simplest way to show a large output string?Hi,
What I want to do is quite simple: I want to show a large output String.
The user then will press "OK"; then the output window disappears, and
the program continues.
The following code would be ok for me, but the real String I want to
show is very long (let's say 1000 characters and 100 lines), so I need
scrollbars...
Could you please tell me the simplest way to achieve this? Thanks in
advance for your help.
==========================
package gui;
import javax.swing.*;
public class Prova {
public static void main(String[] args) {
String s = "hello";
JOptionPane.showMessageDialog(null, s);
System.exit(0);
}
}
=====================
- 11
- JAXB XML Max SizHello All:
I am using JAXB to reading (unmarshall) a XML feed which
is about 4GB of siz. The JAXB seems
can not doing its job. Any one knows how to solve this problem?
ps: does JAXB has a limitation over XML feed size?
Many Thanks!
- 13
- Please help..nu bee correct probable path.. (?)
ahmed khalak wrote:
> Hi
> Thank in advance.... I am getting error when I run from prompt (cmd)..
> I installed Jdk1.5.0_09 path is C:\Program files\Java\Jdk1.......
> I have oracle 9i and oracle 10g installed...
> Path and classpath I have put correctly in windowxp.. as follow
> path=C:\oracle..etc ;C:\Program File\java\Jdk1.5.0_09\bin
> classpath= .;C:\Program File\java\Jdk1.5.0_09\lib\root.jar
> Now when I check version for java and javac.. in other then Jdk1 directory
> I am getting version 1.3.1 where as jdk gives me it version I checked oracle
> directories
> In Oracle directory.. jre show 1.3.1 directory...
> how can I correct this problem.. my simple program compiles but running from
> promp gives error..
>
> would highly appreciate help
> :-) just starting learning Java..
>
> A Khalak
Change the path setting so it reads:
PATH=C:\Program File\java\Jdk1.5.0_09\bin;C:\oracle;...
The OS looks for commands on the PATH from left to right, so starting
with java, then oracle, and so on.
Besides this. The classpath setting isn't really needed. This is a
general note which might bring in problems later. If you don't have a
real need for it, simply remove the classpath setting. You can still
pass it to the java command using the "-classpath" switch.
Regards,
Bart
- 14
- Running a servlet with TomcatHi,
When I use the following URL in Internet Explorer:
http://localhost/servlet/HelloWorldExample
I get an error message:
-----8<------------
HTTP Status 404 - /servlet/HelloWorldExample
--------------------------------------------------------------------------------
type Status report
message /servlet/HelloWorldExample
description The requested resource (/servlet/HelloWorldExample) is not
available.
--------------------------------------------------------------------------------
Apache Tomcat/5.5.17
-----8<------------
I have the HelloWorldExample.class file in
C:\Tomcat5.5\webapps\ROOT\WEB-INF\classes.
Can anyone help me please?
Best regards,
Matheas Manssen
- 14
- garbled JFrame
Ive got a a JFrame class displaying many JLabels with images inside.
It displays fine and I can drag it around the desktop ok.
But when I drag another window over the JFrame my JFrame gets garbled.(get
multiple images of the labels)
Even when i minimize it and maximize it is still garbled.
why would that be?
TIA
patrick
- 14
- Critical Problem with Tomcat 3.3.1 and SSLHello,
I am having a serious problem trying to set up SSL on Tomcat 3.3.1 on
Windows 2000. I am following the jakarta guidelines exactly as they
propose, but I am having absolutely no luck. What am I doing wrong?
Here is the procedure I follow:
First, I run the following command -
keytool -genkey -keyalg rsa -alias name -keystore name
- I then answer the questions. I tried setting the common name as
my name, and a second time as the the URL used to access the site in
question, ie: sitename.com
Then, I issue the following command -
keytool -certreq -keystore name -alias name -file name.csr
Next, I send the name.csr file to the CA, and recieve 3 certificates.
The 3 certificates I receive are RootCert.cer, IntCert.cer and
NewCert.cer. So, I then issue the following commands in this order:
keytool -import -trustcacerts -file RootCert.cer -alias rootcert
-keystore name
keytool -import -trustcacerts -file IntCert.cer -alias intcert
-keystore name
keytool -import -trustcacerts -file NewCert.cer -alias newcert
-keystore name
After each command I receive confirmation that the certification was
properly inserted. I then copy the 'name' file to TOMCAT_HOME/conf
and edit the server.xml file. I add the following lines to the
server.xml file:
<Http10Connector
port="8443"
secure="true"
keystore="c:\tomcat\conf\name"
keypass="password"
clientauth="false"/>
Now, I restart tomcat and assume that everything should be in order.
When starting tomcat via the batch file, I see that an Http10Connector
is correctly sitting on port 8443. So, I try accessing the site
normally, and everything works fine. However, if I attempt an HTTPS
request to the site, I receive a page cannot be displayed error. This
is strange, because I figured that at this point it should work.
Well, I then attempted to access it manually by addressing
localhost:8443 .... this is where I noticed a problem. Once the
request is sent to Tomcat, Tomcat throws the following exception:
PoolTcpEndpoint: Handshake failed
javax.net.ssl.SSLException: Unrecognized SSL handshake.
at com.sun.net.ssl.internal.ssl.InputRecord.read(DashoA6275)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(DashoA6275)
at java.io.OutputStream.write(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(DashoA6275)
at org.apache.tomcat.util.net.JSSESocketFactory.handshake(JSSESocketFactory.java:270)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:479)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Unknown Source)
ThreadPool: Caught exception executing
org.apache.tomcat.util.net.TcpWorkerThread@3a8602, terminating thread
java.lang.NullPointerException
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:498)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
at java.lang.Thread.run(Unknown Source)
What is going on? Luckily, I have access to a CA, so this process
isn't costing me anything, however I have attempted this multiple
times with various certificates and various settings on the
certificate and I always get this same exception. What's more, I
tried creating a self signed certificate and I still get this
exception. Am I doing something wrong? I have scoured the net
countless times and it seems like all the instructions say the same
thing. When I search for this error, none of the recomendations fit
my situation. If no one knows how to fix this, could someone please
recomend where I can go so that I can find the answer to this problem?
Please help me out, this is driving me nuts. Thanks in advance,
Dan
- 14
- In Swing, using the RTFEditorKit, how to copy/cut Formatting *and* text to the Clipboard?Hi Folks:
Any idea on the best approach to support copy/cut of all style/formatting as
well as plain text for a JTextPane? I googled quite a bit and located a
word processing program that supports JTextPane but they specifically
mention it only places "plain text" to the Clipboard and ignores the
formatting information when transfering.
I was thinking about implementing the Transferable interface and using the
Clipboard.setContents(..) method but I'm not sure yet by which procedure I
implement the getTransferData() as it wants to return an Object. I could
use a byte[] stream and return a ByteArrayOutputStream who's contents would
be filled with the Document's data (ie, plain text *and* the control/style
information). I just don't know if that would work yet but I plan to try
that.
Seems like there's very little (if anything) mentioned in the sun
developer's forum on how to do this as well as in google...
First of all, is Java's support for RTF still somewhat "primative"??? I
have a full blown word processor going which looks like Word and supports
font changes, size changes, find/replace operations, etc... It's just that
the cut/copy only transfers the plain text (despite my attempts to call
setContentType("text/rtf")) to the clipboard and not the style information.
thanks for any insight, Theron
|
| Author |
Message |
Jean-Baptiste Quenot
|
 Posted: 2006-4-12 2:02:00 |
Top |
java-programmer, Getting JAVA_HOME at runtime
Hello,
The Java ports infrastructure provides JAVA_HOME on build-time to
port's Makefile. But is it possible to get this variable from
/usr/local/bin/java at runtime?
How to change the Java version for a port at runtime in the rc
script? It is possible to set the preferred JDK in
/usr/local/etc/javavms but then JAVA_HOME still needs to be
set manually.
I would like to avoid hard-coding the JAVA_HOME at build time in
the rc scripts.
Any idea?
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
|
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Herve Quiroz
|
| Posted: 2006-4-12 6:24:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
On Tue, Apr 11, 2006 at 08:01:46PM +0200, Jean-Baptiste Quenot wrote:
> The Java ports infrastructure provides JAVA_HOME on build-time to
> port's Makefile. But is it possible to get this variable from
> /usr/local/bin/java at runtime?
>
> How to change the Java version for a port at runtime in the rc
> script? It is possible to set the preferred JDK in
> /usr/local/etc/javavms but then JAVA_HOME still needs to be
> set manually.
>
> I would like to avoid hard-coding the JAVA_HOME at build time in
> the rc scripts.
>
> Any idea?
In /usr/local/bin/javavm, line 447:
export JAVA_HOME
tryJavaCommand "${JAVA_HOME}/bin/${IAM}" "${@}"
So indeed, JAVA_HOME is set accordingly to the JVM picked up by the
script.
That's how the launcher shell script works for devel/maven2 for example.
Herve
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Jean-Baptiste Quenot
|
| Posted: 2006-4-13 2:00:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
* Herve Quiroz:
> In /usr/local/bin/javavm, line 447:
>
> export JAVA_HOME
> tryJavaCommand "${JAVA_HOME}/bin/${IAM}" "${@}"
>
> So indeed, JAVA_HOME is set accordingly to the JVM picked up by the
> script.
>
> That's how the launcher shell script works for devel/maven2 for example.
OK, but imagine that the target application has a shell script
that needs JAVA_HOME. There are plenty of programs that are based
on JAVA_HOME instead of the java binary.
How to get the preferred JAVA_HOME?
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
|
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Herve Quiroz
|
| Posted: 2006-4-15 8:41:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
On Wed, Apr 12, 2006 at 08:00:28PM +0200, Jean-Baptiste Quenot wrote:
> > So indeed, JAVA_HOME is set accordingly to the JVM picked up by the
> > script.
> >
> > That's how the launcher shell script works for devel/maven2 for example.
>
> OK, but imagine that the target application has a shell script
> that needs JAVA_HOME. There are plenty of programs that are based
> on JAVA_HOME instead of the java binary.
>
> How to get the preferred JAVA_HOME?
ATM you can't. So far, each time I needed such feature I found a
workaround or ended up enforcing a JDK in the shell script.
Depending on the script you have in mind, such feature could indeed be
interesting to implement. The main problem I see here is that javavm
cannot tell which JVM is the good one until it manages to run one. So
the only way to be sure of our JAVA_HOME would be to run a Java class
that uses System.getEnv() to display JAVA_HOME to the standard output.
This would just double the startup time of the application. Anyway, if
this JAVA_HOME is important to determine, and when dealing with a
"server" application which is run once in a while (e.g. at boot), I can
imagine it could be worth it.
Herve
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Jean-Baptiste Quenot
|
| Posted: 2006-4-17 18:25:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
* Herve Quiroz:
> ATM you can't. So far, each time I needed such feature I found a
> workaround or ended up enforcing a JDK in the shell script.
Actually I found a solution by analyzing what javavm is doing:
make -f /usr/ports/Mk/bsd.port.mk -V JAVA_HOME USE_JAVA=yes
And this will allow the sysadmin to set a version requirement, eg:
resin2_java_version=1.5+
Will be translated into:
JAVA_HOME=$(make -f /usr/ports/Mk/bsd.port.mk -V JAVA_HOME USE_JAVA=yes JAVA_VERSION="${resin2_java_version}")
However it slows down a little bit the rc script.
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
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Jean-Baptiste Quenot
|
| Posted: 2006-4-18 16:49:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
* Greg Lewis:
> Yes. It also potentially fails if the machine has installed the
> resin2 package but hasn't got the ports tree installed.
Right.
> Unfortunately I don't have a good solution to that at the
> moment. It almost seems like we want a flag or environment
> variable that tells javavmwrapper to dump what it found out
> rather than actually executing anything.
That would be interesting, but can you confirm that the JDK lookup
algorithm is implemented both in bsd.java.mk and in javavm? We
might want to unify both, for example bsd.java.mk should use the
wrapper.
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
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Jean-Baptiste Quenot
|
| Posted: 2006-4-19 21:41:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
* Herve Quiroz:
> javavmwrapper, OTOH, uses the logic from bsd.java.mk (not
> reimplementing it) to pick a port that is *already* installed
> via the ports.
You're right, but if it can't read bsd.port.mk, javavm tries to
find the JDK itself from line 465 to line 573, that's why I say we
have two implementations of the lookup algorithm.
I'm attaching a patch to add documentation to javavm, and to allow
for a JAVAVM_DRY_RUN environment variable that makes javavm find
the best suitable JVM and print the corresponding value of
JAVA_HOME instead of executing it.
If you are interested, I can submit a PR.
For this to work correctly, we need javavm to stop upon failure.
Until now, when the java program cannot be exec-uted, javavm
issues a warning and goes on to the next JVM.
Best regards,
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
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Jean-Baptiste Quenot
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| Posted: 2006-4-19 21:49:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
This one will still be better.
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
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Herve Quiroz
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| Posted: 2006-4-19 22:59:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
Hi Jean-Baptiste,
On Wed, Apr 19, 2006 at 03:40:41PM +0200, Jean-Baptiste Quenot wrote:
> > javavmwrapper, OTOH, uses the logic from bsd.java.mk (not
> > reimplementing it) to pick a port that is *already* installed
> > via the ports.
>
> You're right, but if it can't read bsd.port.mk, javavm tries to
> find the JDK itself from line 465 to line 573, that's why I say we
> have two implementations of the lookup algorithm.
Indeed. Moreover, as you said, javavm only does this specific lookup if
there is no bsd.port.mk. No need to have this logic within bsd.java.mk,
because if there is no bsd.port.mk, there is eventually no bsd.java.mk.
:)
> I'm attaching a patch to add documentation to javavm, and to allow
> for a JAVAVM_DRY_RUN environment variable that makes javavm find
> the best suitable JVM and print the corresponding value of
> JAVA_HOME instead of executing it.
[...]
> +# Environment variables affecting the behaviour of this program:
> +#
> +#
> +# JAVA_HOME
> +#
> +# Allows to choose the preferred JVM
> +#
> +#
> +# JAVA_VERSION
> +#
> +# Allows to choose a preferred JVM version
I don't think it's worth it to list those variables here as there is
already a man page for javavm(1) which is quite detailed on the subject
(and it explains the other variables, such as JAVA_OS and JAVA_VENDOR).
> +# JAVAVM_DRY_RUN
> +#
> +# When set, find the best suitable JVM and print the corresponding value of
> +# JAVA_HOME instead of executing it
This info is useful, but it should rather be added directly to the
manpage when we're done implementing the feature.
The patched javavm works fine for me (I tested the latest version).
Herve
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herve.quiroz
|
| Posted: 2006-4-19 23:02:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
Hi Jean-Baptiste,
On Wed, Apr 19, 2006 at 03:40:41PM +0200, Jean-Baptiste Quenot wrote:
> > javavmwrapper, OTOH, uses the logic from bsd.java.mk (not
> > reimplementing it) to pick a port that is *already* installed
> > via the ports.
>
> You're right, but if it can't read bsd.port.mk, javavm tries to
> find the JDK itself from line 465 to line 573, that's why I say we
> have two implementations of the lookup algorithm.
Indeed. Moreover, as you said, javavm only does this specific lookup if
there is no bsd.port.mk. No need to have this logic within bsd.java.mk,
because if there is no bsd.port.mk, there is eventually no bsd.java.mk.
:)
> I'm attaching a patch to add documentation to javavm, and to allow
> for a JAVAVM_DRY_RUN environment variable that makes javavm find
> the best suitable JVM and print the corresponding value of
> JAVA_HOME instead of executing it.
[...]
> +# Environment variables affecting the behaviour of this program:
> +#
> +#
> +# JAVA_HOME
> +#
> +# Allows to choose the preferred JVM
> +#
> +#
> +# JAVA_VERSION
> +#
> +# Allows to choose a preferred JVM version
I don't think it's worth it to list those variables here as there is
already a man page for javavm(1) which is quite detailed on the subject
(and it explains the other variables, such as JAVA_OS and JAVA_VENDOR).
> +# JAVAVM_DRY_RUN
> +#
> +# When set, find the best suitable JVM and print the corresponding value of
> +# JAVA_HOME instead of executing it
This info is useful, but it should rather be added directly to the
manpage when we're done implementing the feature.
The patched javavm works fine for me (I tested the latest version).
Herve
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|
| |
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Jean-Baptiste Quenot
|
| Posted: 2006-4-19 23:31:00 |
Top |
java-programmer >> Getting JAVA_HOME at runtime
* Herve Quiroz:
> This info is useful, but it should rather be added directly to
> the manpage when we're done implementing the feature.
OK I will provide a patch against shell script *and* man page
then.
Thanks for your help,
--
Jean-Baptiste Quenot
aka John Banana Qwerty
http://caraldi.com/jbq/
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Index ‹ java-programmer |
- Next
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From: "Erica Wheatcroft" <email***@***.com>
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...
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array_name[ n ] = new rectangle( );
}
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...
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What I'm trying to understand in the above snippet is the line where the
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- 13
- getting Error: could not find libjava.so Re: building a jdk1.5
On Mar 3, 2007, at 5:18 PM, Bill Moran wrote:
>
>> On Mar 3, 2007, at 4:01 PM, Chad Leigh -- Shire.Net LLC wrote:
>>
>>> Hi
>>>
>>> I am trying to build jdk15 inside my jail with PREFIX set to /usr/
>>> public (At one time I successfully got jdk 1.4 to build after much
>>> hacking)
>>>
>>> I have the option for builing inside a jail set. We get to the
>>> point where the linux java is installed and it is actually building
>>> the jdk
>>>
>>> # Start of jdk build
>>> /libexec/ld-elf.so.1: /usr/local/lib/libiconv.so.3: Undefined
>>> symbol "__mb_cur_max"
>>> *** Error code 1
>>>
>>> Stop in /usr/ports/java/jdk15.
>>> #
>>>
>>> I am not exactly sure what it is doing at this point in order to
>>> hack round it. libiconv a fresh install from ports
>>>
>>
>> Turns out that the issue is that gmake cannot run. I have not
>> figured out why yet, having removed and reinstalled libiconv and
>> gmake and getting the same error. But it is not java related.
>>
>> I'll redirect this to -questions
>>
>> If anyone has an idea on why gmake would fail as above on a fresh
>> install, 6.2-RELEASE from a day or two ago, I would appreciate it.
>> Please CC me as I am not currently subscribed to -questions, though I
>> am on -java
>
> Not a direct answer to your question, but when I needed to do this
> a few months ago, I just did a "make package" on my workstation, then
> shipped the package up to the jail system and installed it with
> pkg_add.
>
> Doesn't solve the problem, but if you're in a pinch, it's a handy
> workaround.
>
OK, I had never done this before -- built a package from a port. So
I did this on the base machine and then copied it into the jail and
did a pkg_add like so
# pkg_add -P /usr/public -v jdk-1.5.0p4_1.tbz
as I wanted it installed in my local policy dir /usr/public (which
gets mounted RO in every jail). My 1.4.2 java on my other jail
server is installed like this (but was built inside the jail many
moons ago).
Now, when I try to run java I get
# java -version
Error: could not find libjava.so
Error: could not find Java 2 Runtime Environment.
#
Java is in /usr/public/jdk1.5.0/ (the same as my 1.4.2 on the other
server which is in /usr/public/jdk1.4.2/). libjava.so is inside the
lib dir and I thought that java was referential to itself so it could
find its libraries.
I also tried setting JAVA_HOME and JRE_HOME though I have not had to
do that in a long time.
The new 1.5 jdk is registered in the javavms file .
When I run the javavm script with /bin/sh -x it does run the correct
java and running it with an explicit path does not help.
# /bin/sh -x /usr/public/bin/javavm -version
+ _JAVAVM_SAVE_PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/
sbin:/usr/pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/
bin
+ export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+ _JAVAVM_PREFIX=/usr/public
+ _JAVAVM_CONF=/usr/public/etc/javavms
+ _JAVAVM_OPTS_CONF=/usr/public/etc/javavm_opts.conf
+ basename /usr/public/bin/javavm
+ _JAVAVM_PROG=javavm
+ _JAVAVM_MAKE=/usr/bin/make
+ [ javavm = javavm ]
+ echo javavm: warning: The use of 'javavm' as a synonym for 'java'
is deprecated
javavm: warning: The use of 'javavm' as a synonym for 'java' is
deprecated
+ _JAVAVM_PROG=java
+ [ -r /usr/public/etc/javavm_opts.conf ]
+ . /usr/public/etc/javavm_opts.conf
+ _JAVAVM_OPTS=
+ setJavaHome
+ realpath
+ realpath /usr/public
+ [ -n -a /stubs/usr_local/etc/ssmtp != /usr/public ]
+ unset JAVA_HOME
+ _JAVAVM_PORTSDIR=
+ [ -r /usr/share/mk/bsd.port.mk ]
+ /usr/bin/make -f /usr/share/mk/bsd.port.mk -V PORTSDIR
+ _JAVAVM_PORTSDIR=
+ _JAVAVM_BSD_PORT_MK=
+ [ -n -a -r /Mk/bsd.port.mk ]
+ [ -n ]
+ [ ! -e /usr/public/etc/javavms ]
+ sed -E s|[[:space:]]*#.*||
+ uniq
+ _JAVAVM_VMS=/usr/public/jdk1.5.0/bin/java
/usr/public/linux-sun-jdk1.4.2/bin/java
+ [ -n ]
+ dirname /usr/public/jdk1.5.0/bin/java
+ JAVA_HOME=/usr/public/jdk1.5.0/bin
+ dirname /usr/public/jdk1.5.0/bin
+ JAVA_HOME=/usr/public/jdk1.5.0
+ basename /usr/public/jdk1.5.0
+ _JAVAVM_VM=jdk1.5.0
+ [ -n ]
+ [ -n ]
+ [ -n ]
+ [ -n /usr/public/jdk1.5.0 -a -f /usr/public/jdk1.5.0/bin/java ]
+ _JAVAVM_PROG_PATH=/usr/public/jdk1.5.0/bin
+ return 0
+ [ 0 != 0 ]
+ [ -x /usr/public/jdk1.5.0/bin/java ]
+ basename /usr/public/jdk1.5.0
+ setJavaOptions java jdk1.5.0
+ echo java
+ sed -e s/\./_/g -e s/-/_/g
+ local OPTS_PROG=java
+ echo jdk1.5.0
+ sed -e s/\./_/g -e s/-/_/g
+ local OPTS_JAVA_HOME=jdk1_5_0
+ eval echo ${JAVAVM_OPTS_jdk1_5_0_java}
+ local JAVA_HOME_PROG_OPTS=
+ eval echo ${JAVAVM_OPTS_jdk1_5_0}
+ local JAVA_HOME_OPTS=
+ eval echo ${JAVAVM_OPTS_java}
+ local PROG_OPTS=
+ [ -n ]
+ [ -n ]
+ [ -n ]
+ [ -n ]
+ export JAVA_HOME
+ tryJavaCommand /usr/public/jdk1.5.0/bin/java -version
+ [ -n ]
+ [ -x /usr/public/jdk1.5.0/bin/java ]
+ [ -n /sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/sbin:/usr/
pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/bin ]
+ export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/sbin:/
usr/pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/bin
+ exec /usr/public/jdk1.5.0/bin/java -version
Error: could not find libjava.so
Error: could not find Java 2 Runtime Environment.
#
What did I do wrong?
Thanks
Chad
---
Chad Leigh -- Shire.Net LLC
Your Web App and Email hosting provider
chad at shire.net
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- 14
- How do i implement this interfacepublic interface AQuestion
{
public abstract void someMethod() throws Exception;
}
http://www.angelfire.com/or/abhilash/Main.html
see Question no 5.
How do i implement this interface ?
(1) problem is, it has an abstract method and hecne its complicated
to implement this class.
(2) another problem is, it is the public interface and hence we can not
make one more public class in the same file....because 1 file can have
only 1 public access specifier.
is it really possible to implement this interface ?
- 15
- J2ME internationalizationI want to provide the binary with *only one* language, because I want to
be as small as I can.
But I want to provide many binaries (one per language).
So, I write the code with hardcoded strings like "$_nearest_dist_$".
I write a file like:
-----english.ini----
$_nearest_dist_$=Nearest distance is 90m
--------------------
and I write a php script which in *.java files, replaces all strings in
form "$_*_$" with language correct string.
php phpWriteStringsToSource.php <project_folder> <language.ini>
THE BIG PROBLEM: I realize that *.java files must have ansi* encoding!
Any of utf-8, uc16le or be is not compiled correct!
So, what I can do?
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