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Oracle 11gR2 Design Center Can't find Java Virtual Machine

I'm having an issue with Oracle 11g R2 Design Center feature. When I click it, it gives me the error below:
C:\app[username]\product\11.2.0\dbhome_1\owb\bin\win32>call setowbenv.bat
WARNING: Unknown directive: SetSkipJ2SDKCheck
WARNING: Could not find jvm.cfg! in 'C:\app[username]\product\11.2.0\dbhome_1\jdk\jre\lib\jvm.cfg'
WARNING: Cannot find default VM "client" at C:\app[username]\product\11.2.0\dbhome_1\jdk
ERROR: Cannot find VM at: C:\app[username]\product\11.2.0\dbhome_1\jdk
Aborting!
I've tried many things to resolve this, as listed below:
Download 32b version of JDK (actually, I've downloaded multiple to rule out the version issue, both 32 and 64)
Point environment variable and path to JDK installation
Change sqldeveloper.cfg file to include SetJavaHome {path to JDK}
Move the jvm.cfg file to the directory it's expected to be at
Checked the paths to ensure the expected files were there
With step 4, after doing so I receive a different error message:
"Client VM is unsupported"
With step 5, after doing so I realized the path to the executable was not in:
C:\app[username]\product\11.2.0\dbhome_1\jdk
But instead in:
C:\app[username]\product\11.2.0\dbhome_1\jdk\bin
So, from all of this I feel that if I can change the path the Oracle Design Center is using to the correct path, then this should resolve. Problem is, I'm unsure where to find this. Also, if it helps I believe the Design Center uses JDeveloper, since the error suggests to view the Oracle 9i JDeveloper Install Guide at jdev\install.html. I tried going to this link but I'm not sure if it exists anymore because it took me to Google. I chose the most relevant link but still, I did not find any information regarding this issue. If anyone can help I'd be very thankful, this has been running me in circles for 3 days now.
TIA

h2o code in R is not working - strange error message

I cannot seem to get the h2o code to load in R. I tried to start up h2o using the following codes:
h2o.no_progress()
h2o.init(max_mem_size = "5g")
This did not work so I tried the code below and got the following error message.
h2o.init()
'''H2O is not running yet, starting it now...
<simpleError in system2(command, "-version", stdout = TRUE, stderr = TRUE): '""' not found>
Error in value[3L] :
You have a 32-bit version of Java. H2O works best with 64-bit Java.
Please download the latest Java SE JDK from the following URL:
https://www.oracle.com/technetwork/java/javase/downloads/index.html'''
I tried downloading the Java update, but the link does not work. I am not sure how to fix the error. I am trying to do PCA on my dataset.

That is the correct link: https://www.oracle.com/java/technologies/javase-downloads.html Are the double quotes at the end of the link part of the error message? Or did that get added when you formatted your question here? If you remove the quotes at the end, the link works.
Please download Java 11 because Java 14 (the latest) was just released and we don't officially support it yet. H2O system requirements (Java 8-13) are listed here.

Error loading xlsx package

yesterday we migrated to windows 7 in our firm and also updated the java packages and also R (to 2.14).
Then I tried to load the xlsx package, because I rely heavly on it but i get the following error:
Error : .onAttach in attachNamespace()
Error: .jnew("org/apache/poi/xssf/usermodel/XSSFWorkbook")
I tried the following, but it did not work:
Sys.setenv(PATH=paste(Sys.getenv("PATH"),"C:\\Program Files (x86)\\Java\\jre6\\bin\\client",collapse=';'))
options(java.parameters = "-Xmx1000m")
Since I never work with java i have no clue what I can do. Can you help me?
Thank you!
sessionInfo()
R version 2.14.1 (2011-12-22)
Platform: i386-pc-mingw32/i386 (32-bit)
locale:
[1] LC_COLLATE=German_Austria.1252 LC_CTYPE=German_Austria.1252
[3] LC_MONETARY=German_Austria.1252 LC_NUMERIC=C
[5] LC_TIME=German_Austria.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] xlsxjars_0.4.0 rJava_0.9-3
loaded via a namespace (and not attached):
[1] tools_2.14.1 xlsx_0.4.2
The interesting thing is, that the package XLConnect loads without problems.EDIT: Ok, it loads without problems but loading a workbook does not work:
Error: NoSuchMethodError (Java): org.apache.xmlbeans.XmlOptions.setSaveAggressiveNamespaces()Lorg/apache/xmlbeans/XmlOptions;
So maybe it is really no Java problem. But I don't want to re-write all my code to XLConnect!
Nobody any ideas what I could try?

I encountered exactly the same error and found a work-around. If you specify a library location on the network to install the package into, the error occurs.
## Example where error occurs:
install.packages('xlsx', lib='\\network\R\library')
library('xlsx', lib='\\network\R\library'))
However, if you change the default location for package installation within R, then you should be able to call the package library without the error. That is, simply typing install.packages('xlsx'), and having the package install automatically to its default location, allowed the package to work properly.

Installing PL/Java on MAC

I’m really having trouble installing Pl/Java on Mac, any help would be appreciated.
I’ll describe the exact steps I’ve done in accordance with the README here, but I still get some errors that I cannot resolve.
(1) I’ve downloaded this version: pljava-i686-pc-linux-gnu-pg9.0-1.4.2
(2) I’ve located three files in the directory: pljava.jar, deploy.jar, pljava.so
(3) I’ve put the two .jars inside: /Library/PostgreSQL/9.0/lib
(4) I’ve put the .so inside: /Library/PostgreSQL/9.0/data
(5) I’ve modified the postgresql.conf as follows:
dynamic_library_path = '$libdir'
custom_variable_classes = 'pljava'
pljava.classpath = '/Library/PostgreSQL/9.0/lib/pljava.jar’
(6) I’ve also tried:
dynamic_library_path = '$libdir:/Library/PostgreSQL/9.0/lib/' (as well as...)
dynamic_library_path = '$libdir:/Library/PostgreSQL/9.0/data/'
(7) I then try to run:
Select sqlj.install_jar('/Software/Libraries/test_trigger.jar', 'samples', false);
Select sqlj.set_classpath(‘public’, ‘samples’);
Although, I keep getting this error:
WARNING: java.lang.NoSuchMethodError: Method org.postgresql.pljava.internal.Portal._fetch(JZI)I not found
ERROR: Unable to register native methods
********** Error **********
ERROR: Unable to register native methods
SQL state: XX000

This sounds like an issue is in not loading the right .jar. You mentioned in your comments that you were also having a problem with appropriate environment variables specifying where to load modules. This may in fact be your main issue. It looks like the equivalent environment variable is DYLD_LIBRARY_PATH though you can get more options by looking at man dyld and obviously if you are loading the wrong .so or .jar you will get errors like this.

Octave Error with XLS functions

I just started using Octave, and have been trying to do some operations from data in Excel files. I've installed the IO, Java, and Windows packages in Octave, but when I run the script, I get the following error message:
Looking for supported interfaces:
Excel/COM... not working.
error: No Java support found.
error: called from:
error: C:\Octave\3.2.4_gcc-4.4.0\share\octave\packages\io-1.0.14\xlsopen.m at
line 395, column 1
error: C:\Octave\3.2.4_gcc-4.4.0\share\octave\packages\io-1.0.14\xlsopen.m at
line 168, column 15
error: C:\Octave\3.2.4_gcc-4.4.0\share\octave\packages\io-1.0.14\xlsread.m at
line 215, column 1
error: C:\Users\Kyle\Desktop\nighttime2.m at line 30, column 18
I've been trying to solve this for a little while now so any help would be greatly appreciated!

The first error is
No Java support found.
So it's probably because you have not properly installed the java package.
Read and follow the instructions under the section How to install the java package in Octave? in the documentation.
There is also a document called: How to install the java package in Octave? that can be helpful.