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Cordova/Android not finding JDK on OSX and PATH/JAVA_HOME correct

So cordova requirements is still failing for Android after trying and verifying all paths, versions and suggestions. It's on OSX 10.10.5 and a clean install of Android SDKs/Studio and cordova. Have tried Apple recommended (export JAVA_HOME=/usr/libexec/java_home -v 1.8) and direct paths with same failed result. Have verified both java/javac are in the bin directory of the JDK path.
sh-3.2# cordova requirements
Requirements check results for android:
Java JDK: not installed
Failed to run "java -version", make sure that you have a JDK installed.
You can get it from: http://www.oracle.com/technetwork/java/javase/downloads.
Your JAVA_HOME is invalid: /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home
Android SDK: installed
Android target: installed android-9,android-10,android-19,android-22,android-23,android-24,Google Inc.:Google APIs:22,Google Inc.:Google APIs:23
Gradle: installed
Error: Some of requirements check failed
sh-3.2# echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/dzhon/bin:/opt/dzhon/sbin:/opt/X11/bin:/usr/local/MacGPG2/bin:/Users/rob/Library/Android/sdk/tools:/Users/rob/Library/Android/sdk/platform-tools:/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/bin:/Users/rob/Documents/software/apache-ant-1.9.7/bin
sh-3.2# echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home
sh-3.2# java -version
java version "1.8.0_102"
Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)
sh-3.2# javac -version
javac 1.8.0_102
sh-3.2# node -v
v5.3.0
sh-3.2# cordova -v
6.2.0
and in ~/.bash_profile:
export ANT_HOME=/Users/rob/Documents/software/apache-ant-1.9.7
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
export ANDROID_HOME=/Users/rob/Library/Android/sdk
export PATH=${PATH}:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools:${JAVA_HOME}/bin:$ANT_HOME/bin
have also checked all the symlinks:
sh-3.2# ls -la /System/Library/Frameworks/JavaVM.framework/Versions/
total 32
drwxr-xr-x 11 root wheel 374 20 Jul 11:54 .
drwxr-xr-x 12 root wheel 408 6 Jan 2016 ..
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.5.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.6 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 26 Mar 2015 1.6.0 -> CurrentJDK
drwxr-xr-x 8 root wheel 272 6 Jan 2016 A
lrwxr-xr-x 1 root wheel 1 26 Mar 2015 Current -> A
lrwxr-xr-x 1 root wheel 59 20 Jul 11:54 CurrentJDK -> /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents
The only thing in digging through the source for cordova-android on gitHub is in check_reqs.js, the error message is:
Failed to run "javac -version", make sure that you have a JDK installed.
rather than as it currently reports:
Failed to run "java -version", make sure that you have a JDK installed.
Any help greatly appreciated.
Rob

So a number of issues. check_reqs.js is where the platform/environment checks are done (app/platforms/android/cordova/lib/). The call to forgivingWhichSync('javac') on line 98 was returning the non-JDK link (as it was using Current, not CurrentJDK):
/System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/javac
By repointing the Current symlink in /System/Library/Frameworks/JavaVM.framework/Versions/ to CurrentJDK it fixed this first issue:
lrwxr-xr-x 1 root wheel 10 21 Jul 12:03 Current -> CurrentJDK
lrwxr-xr-x 1 root wheel 59 21 Jul 12:06 CurrentJDK -> /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents
The next issue was a problem with the tryCommand method testing javac. As correctly noted, javac -version returns the information in stderr. The issue (at least on OSX) is that the call to child_process.exec on line 44 also returns information in err:
Error: Command failed: /bin/sh -c javac -version
javac 1.8.0_102
javac: no source files
Usage: javac <options> <source files>
where possible options include:
-g Generate all debugging info
-g:none Generate no debugging info
-g:{lines,vars,source} Generate only some debugging info
-nowarn Generate no warnings
-verbose Output messages about what the compiler is doing
-deprecation Output source locations where deprecated APIs are used
-classpath <path> Specify where to find user class files
-cp <path> Specify where to find user class files
-sourcepath <path> Specify where to find input source files
-bootclasspath <path> Override location of bootstrap class files
-extdirs <dirs> Override location of installed extensions
-endorseddirs <dirs> Override location of endorsed standards path
-d <directory> Specify where to place generated class files
-encoding <encoding> Specify character encoding used by source files
-source <release> Provide source compatibility with specified release
-target <release> Generate class files for specific VM version
-version Version information
-help Print a synopsis of standard options
-X Print a synopsis of nonstandard options
-J<flag> Pass <flag> directly to the runtime system
The handling of the callback to this child_process.exec always triggered an error if err was non null:
if (err) d.reject(new CordovaError(errMsg));
changing this to only trigger this error if the catchStderr flag was not set now correctly handles the test for javac:
if (err && !catchStderr) d.reject(new CordovaError(errMsg));
and now success:
sh-3.2# cordova requirements
Requirements check results for android:
Java JDK: installed .
Android SDK: installed
Android target: installed android-9,android-10,android-16,android-18,android-19,android-22,android-23,android-24,Google Inc.:Google APIs:16,Google Inc.:Google APIs:18,Google Inc.:Google APIs:22,Google Inc.:Google APIs:23
Gradle: installed
Unfortunately need to edit check_reqs.js for each project when you cordova platform add android but at least it's now finding everything.

Everything worked perfectly when I did the installation with Cordova version 7 and JDK 1.8u131 on OSX. Nothing had to be changed or configured. Possibly the older versions of Cordova had issues.

Troubleshooting Play Framework Installation / Execution

Working on installing the Java "Play" framework (2.2.5) on Debian... seem to have everything installed properly but the file won't run even after modding it with +x:
myuser#Home:~/play-2.2.5$ ls -la
total 44
drwxrwxr-x 5 root root 4096 Oct 6 20:57 .
drwxr-xr-x 31 myuser myuser 4096 Oct 21 13:24 ..
-rw-rw-r-- 1 root root 8700 Oct 6 20:57 CONTRIBUTING.md
drwxrwxr-x 9 root root 4096 Oct 6 20:57 framework
-rwxrwxr-x 1 root root 1795 Oct 6 20:57 play
-rw-rw-r-- 1 root root 1453 Oct 6 20:57 play.bat
-rw-rw-r-- 1 root root 1872 Oct 6 20:57 README.md
drwxrwxr-x 3 root root 4096 Oct 6 20:57 repository
drwxrwxr-x 4 root root 4096 Oct 6 20:57 samples
myuser#Home:~/play-2.2.5$ play
bash: play: command not found
Java is installed..
myuser#Home:~/play-2.2.5$ java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
How should I troubleshoot from here?

By default, the path in Linux does not include the current directory. If you want to run an executable not in the path, you need to specify the full path to the file. For the current directory, specifying the directory . will do the job.
myuser#Home:~/play-2.2.5$ ./play
^^

Tomcat APR native library not loaded *even* when present and configured

The system is Ubuntu 13.04 (64-bit). [Update: also tried on a 12.04 TLS 64-bit, same result]
I compiled the latest (1.4.8) library (process described here) and the files are readable by all:
$ ll /usr/local/apr/lib
-rw-r--r-- 1 root root 8351 Sep 12 19:29 apr.exp
-rw-r--r-- 1 root root 1608792 Sep 12 19:29 libapr-1.a
-rwxr-xr-x 1 root root 965 Sep 12 19:29 libapr-1.la*
lrwxrwxrwx 1 root root 17 Sep 12 19:29 libapr-1.so -> libapr-1.so.0.4.8*
lrwxrwxrwx 1 root root 17 Sep 12 19:29 libapr-1.so.0 -> libapr-1.so.0.4.8*
-rwxr-xr-x 1 root root 925622 Sep 12 19:29 libapr-1.so.0.4.8*
drwxr-xr-x 2 root root 4096 Sep 12 19:29 pkgconfig/
The environment variable is set in .bashrc and it's loaded:
LD_LIBRARY_PATH=/usr/local/apr/lib
I launched Tomcat's Java with -XshowSettings:properties which shows java.library.path contains that path.
java.library.path = /usr/local/apr/lib
/usr/java/packages/lib/amd64
/usr/lib64
/lib64
/lib
/usr/lib
Still, when Tomcat starts I get a message it didn't find it even though it displays the path to that directory.
Sep 12, 2013 8:14:12 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/local/apr/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
I'm really at a loss what could be the cause.
Thank you very much for any pointers.

Installation the native library on Ubuntu server with:
sudo apt-get install libtcnative-1
If that does not work tomcat-native needs to be installed
Install Oracle java7:
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
sudo apt-get install oracle-java7-set-default
Install tomcat apr:
wget http://apache.mirror.anlx.net//apr/apr-1.5.0.tar.gz
tar zxvf apr-1.5.0.tar.gz
rm apr-1.5.0.tar.gz
cd apr-1.5.0 *
sudo ./configure
sudo make
sudo make install
export LD_LIBRARY_PATH='$LD_LIBRARY_PATH:/usr/local/apr/lib'
Install tomcat tomcat-native:
wget http://mirrors.ukfast.co.uk/sites/ftp.apache.org//tomcat/tomcat-connectors/native/1.1.29/source/tomcat-native-1.1.29-src.tar.gz
tar zxvf tomcat-native-1.1.29-src.tar.gz
rm tomcat-native-1.1.29-src.tar.gz
cd tomcat-native-1.1.29-src/jni/native
JAVA_HOME=/usr/lib/jvm/java-7-oracle
sudo ./configure --with-apr=/usr/local/apr --with-java-home=$JAVA_HOME
sudo make
sudo make install

I found the solution in the meantime. I also needed to install the native library support for Tomcat. Should anyone search for this, I downloaded tomcat-native-1.1.27-src (the latest at this time). The commands are below.
cd tomcat-native-1.1.27-src/jni/native
./configure --with-apr=/usr/local/apr --with-java-home=/home/foo/jdk1.7.0_25 --with-ssl=yes
make
sudo make install

Mac OSX Java Terminal version incorrect

Ok, I'm a bit new to Macs and OSX, but I picked one up so that I can do some troubleshooting on my Java programs with one since the company I work for uses a combination of OSX and Windows machines. The problem I'm running into is, when I install Java 7 from Oracle's website, it updates the preferences menu and appears to execute .jar files correctly when double-clicking them, but the terminal window's version is still 1.6.0_43 and running the same .jar file from the terminal results in runtime errors due to the older version.
When I navigate to /Library/Java/JavaVirtualMachines/ I'm presented with an empty folder. From what I've seen in other articles, this is where the Java 1.7.0's version folder should be. Any idea what's going on? How can I get the terminal to use the correct version of Java?
Edit: #DWilches comment on his original answer:
(1)
total 64
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.5.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.6 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 17 21:38 1.6.0 -> CurrentJDK
drwxr-xr-x 8 root wheel 272 Mar 17 21:38 A
lrwxr-xr-x 1 root wheel 1 Mar 17 21:38 Current -> A
lrwxr-xr-x 1 root wheel 59 Mar 17 21:38 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents
(2)
ls -ld /usr/bin/java
lrwxr-xr-x 1 root wheel 74 Mar 17 21:38 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
Edit: sorry for the mistake with a new answer, gotten too used to sites that block edits of the original post after so long...

JDK
On Mac OS, /usr/bin/java and friends are stubs that delegate to the real JDK commands. These stubs respect the setting of your JAVA_HOME environment variable, but for this to work you need to install the JDK (from http://www.oracle.com/technetwork/java/javase/downloads/index.html) as opposed to the JRE (from http://java.com).
The JDK installs into /Library/Java/JavaVirtualMachines/jdk1.7.0_NN.jdk (for whatever value of NN), so set your JAVA_HOME environment variable to /Library/Java/JavaVirtualMachines/jdk1.7.0_NN.jdk/Contents/Home to make /usr/bin/java use 1.7. You can switch back to 1.6 simply by pointing your JAVA_HOME to /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home instead. You can use the /usr/libexec/java_home tool to find the right value automatically, for example to make /usr/bin/java use Java 7 you can do
export JAVA_HOME=`/usr/libexec/java_home -v '1.7*'`
and to make it use Java 6 you can do
export JAVA_HOME=`/usr/libexec/java_home -v '1.6*'`
The same applies to Java 8 (using -v '1.8*'). This will pick up the latest installed JDK for the relevant major version, you don't need to remember to change the NN by hand when you install an update.
JRE
If you want to run the 1.7 or 1.8 JRE from the command line, it can be found in /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java. This is a fixed path and you can only have one "public" JRE installed at any given time.
$ /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java -version
java version "1.7.0_13"
Java(TM) SE Runtime Environment (build 1.7.0_13-b20)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
You could use a shell alias in your .bashrc
alias java_jre='/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java'

The issue is that Oracle's JRE installation does not change the /usr/bin/java executable. If you want to use this Java you have to use the path under /Library (need to find what this is I have JDK install so could be different)
As per Oracle's JRE installation document
Installing a JRE from Oracle will not update java -version symlinks or
add java to your path. To be able to do this, you need to install the
JDK.
The Oracle JDK does change /usr/bin/java to point to the Java 7 executable. If you are doing development then you should use this as it includes more than the JRE.
The Oracle install FAQ says
Q: Should I install the JRE or the JDK?
A: If you plan to run Java applications, install the Java Runtime
Environment (JRE). The JRE is also referred to as Oracle Java. Once
you have installed the JRE, you can launch Java applets and
applications by double-clicking JAR files, JNLP files, and via the
browser. Note that 32-bit browsers, such as Firefox in 32-bit mode,
and Chrome, are not supported by the JRE.
If you plan to write Java applications, install the Java Development
Kit (JDK).

First, did you Quit the Console and open it again so it has chances of taking the changes in the PATH variable ?
If you've already done this, then check which the default version of your Java is:
dwilches# ~$ cd /System/Library/Frameworks/JavaVM.framework/Versions/
dwilches# Versions$ ls -l
lrwxr-xr-x 1 root wheel 59 Mar 19 10:07 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.6.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.6 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.5.0 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 Mar 19 10:07 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 1 Mar 19 10:08 Current -> A
drwxr-xr-x 8 root wheel 272 Mar 25 10:03 A
Now, you can see that the "Current" version is "A" (that's my Java7). If I would like to change it to Java 1.6 then I could write:
dwilches# Versions$ sudo unlink Current
dwilches# Versions$ sudo ln -s 1.6 Current
And then:
dwilches# Versions$ java -version
java version "1.6.0_43"
Java(TM) SE Runtime Environment (build 1.6.0_43-b01-447-11M4203)
Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01-447, mixed mode)
So you may use this to make "Current" point to your desired Java location.

Just like Ian said, but probably you want java7 to be called from .sh script, so you need a function instead of alias added to .bash_profile:
java7() {
/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java "$#"
}
export -f java7

Where is Oracle's (Sun's) JDK/JRE installed on Mac OS X 10.8 Mountain Lion?

Where does Oracle (Sun) install their JDK/JRE on Mac OS X 10.8 Mountain Lion?

/Library/Java/JavaVirtualMachines/ according to the Mac JDK Uninstall Docs.

The Oracle Java SE downloads at: http://www.oracle.com/technetwork/java/javase/overview/index.html
install here on Maverick at least:
/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/
this JRE is entirely separate from the ones that Apple has installed, which are under /System/Library/Frameworks/JavaVM.framework/Versions/ as another answer mentioned.

If you setting the JRE path in something like Eclipse you'll need to point to the /home directory i.e
/Library/Java/JavaVirtualMachines/<Replace with version>/Contents/Home

Some of the other answers might be correct but this is what worked for me (which is different and up to date as of January 2016) when installing it on a new computer at the office.
The path as mentioned in another answer is
/Library/Java/JavaVirtualMachines/<Replace with version>/Contents/Home
Here however is a visual guide to getting there, because you can find many directories named "Library". Make sure you are here
then click into JavaVirtualMachines
If you are doing a new setup and just downloaded Android studio, they might have sent you to "Download Java for OS X 2015-001" at https://support.apple.com/kb/dl1572?locale=en_US That gives you version 1.6.0
That won't work!!!!
I got the error that I needed JDK 7.0 or newer.
I looked for a newer version and found this link from Oracle
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
I installed it, then selected that one. And it worked

On my system, evaluating which java leads me to /usr/bin/java. This in turn is a symlink to:
/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
In case it's relevant, java -version tells me I have 1.6.0_37 installed.

The JDK/JRE as mentioned in previous answers is located in /Library/Java/JavaVirtualMachines/<version>/Contents/Home/. The JRE is dir under this Home.
Interestingly browsers doesn't use files from this location for java applet plugin. The location used by browsers is /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/.
In fact if you run JRE installer, it updates the files in this location rather than JDK/JRE location.

Enough answers here, but I'm JUST adding a way to find it by yourself
$ sudo find / -name Java
/Library/Application Support/Oracle/Java
/Library/Java
/private/var/root/Library/Application Support/Oracle/Java
/System/Library/Java
/Users/prayagupd/Library/Application Support/Oracle/Java
To be more specific,
$ sudo find / -name jdk*
/Applications/Android Studio.app/Contents/jre/jdk
/Applications/Android Studio.app/Contents/lib/jdkAnnotations.jar
/Applications/IntelliJ IDEA.app/Contents/jre/jdk
/Applications/IntelliJ IDEA.app/Contents/lib/jdkAnnotations.jar
/Library/Java/JavaVirtualMachines/jdk1.7.0_76.jdk
You see /Library/Java/JavaVirtualMachines/ is the place you need to look inside.
And /Library/Java/JavaVirtualMachines/jdk<version>.jdk/Contents/Home/ is your JAVA_HOME
$ ls -ls /Library/Java/JavaVirtualMachines/jdk1.7.0_76.jdk/Contents/Home/
total 39776
8 -rw-rw-r-- 1 root wheel 3339 Dec 18 2014 COPYRIGHT
8 -rw-rw-r-- 1 root wheel 40 Dec 18 2014 LICENSE
8 -rw-rw-r-- 1 root wheel 114 Dec 18 2014 README.html
216 -rw-rw-r-- 1 root wheel 110114 Dec 17 2014 THIRDPARTYLICENSEREADME-JAVAFX.txt
344 -rw-rw-r-- 1 root wheel 173559 Dec 18 2014 THIRDPARTYLICENSEREADME.txt
0 drwxrwxr-x 44 root wheel 1496 Feb 28 20:13 bin
0 drwxrwxr-x 9 root wheel 306 Feb 28 20:13 db
0 drwxrwxr-x 9 root wheel 306 Feb 28 20:13 include
0 drwxrwxr-x 10 root wheel 340 Feb 28 20:13 jre
0 drwxrwxr-x 14 root wheel 476 Feb 28 20:13 lib
0 drwxrwxr-x 5 root wheel 170 Dec 18 2014 man
8 -rw-rw-r-- 1 root wheel 502 Dec 18 2014 release
39184 -rw-rw-r-- 1 root wheel 20061067 Dec 18 2014 src.zip

The version 8 release from Oracle (1.8.0_40-b25) can be found at:
/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/bin/java
FYI: Oracle is not following the practice of making /Library/Java/Current (etc) a link to the latest installed java.
Below is my method of keeping up with versions over time: from my .zshrc file:
108 JAVA_6_HOME=/System/Library/Frameworks/JavaVM.framework/Home
109 JAVA_7_HOME=/Library/Java/Current
110 JAVA_8_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home
111
112 export JAVA_6_HOME
113 export JAVA_7_HOME
114 export JAVA_8_HOME
115
116 export JAVA_HOME=$JAVA_8_HOME
117
118 PATH=$PATH:$JAVA_HOME/bin
119