How to compile javafx "Hello World" from windows/cygwin/bash prompt

[Siegfried Heintze]

I'm confused about the download site for java and javafx : http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

It says: "Looking for JavaFX SDK?
JavaFX SDK is now included in the JDK for Windows, Mac OS X, and Linux x86/x64"

OK, so after downloading this I was expecting to not have to explicitly specify a CLASSPATH when running javac and java when compiling/running the HelloWorld program at http://docs.oracle.com/javafx/2/get_started/hello_world.htm.

Since I did not explicitly download javafx as a separate installation, I don't know where javafx is so I cannot setup the CLASSPATH variable.

Can someone guide me? Do I need to define CLASSPATH so I can compile "hello world"? If so, what is the value (I cannot find the separate directories for javafx in the "c:\Program Files\Java" directories). Do I need to explicitly download javafx?
Thanks
Siegfried

[John Damien Smith]

> Do I need to define CLASSPATH so I can compile "hello world"?

Yes (for jdk1.7u11, not for the jdk8 release).

> If so, what is the value

Place <JDK_HOME>/jre/lib/jfxrt.jar on your classpath (substituting <JDK_HOME> with the location of your jdk installation).

"%JDK_HOME%\bin\javac" -classpath "%JDK_HOME%\jre\lib\jfxrt.jar" MyApp.java
java -classpath "%JDK_HOME%\jre\lib\jfxrt.jar;." MyApp

> Do I need to explicitly download javafx?

No.

[Siegfried Heintze]

Hmmm... I'm still having trouble. I'm not familiar with %JDK_HOME%. I have set up %JAVA_HOME%.

I'm using cygwin, however, so my syntax is a little different. I think I should be able to use CLASSPATH instead of -classpath -- correct?
Why does it think I'm running on a 32 bit platform?

Well, maybe bash is a 32 bit platform? OK, but I got the same error when using similar commands from cmd.exe. I'm confused!

echo $JAVA_HOME
c:\Program Files\Java\jdk1.7.0_11
echo $CLASSPATH
bin;.;c:\Program Files\Java\jdk1.7.0_11\jre\lib\jfxrt.jar
javac -g HelloWorld.java -d bin
java helloworld.HelloWorld
Exception in thread "main" java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: C:\Program Files\Java\jdk1.7.0_11\jre\bin\glass.dll: Can't load AMD 64-bit .dll on a IA 32-bit platform
	at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:281)
	at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:122)
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:163)
	at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
	at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.UnsatisfiedLinkError: C:\Program Files\Java\jdk1.7.0_11\jre\bin\glass.dll: Can't load AMD 64-bit .dll on a IA 32-bit platform
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary0(Unknown Source)
	at java.lang.ClassLoader.loadLibrary(Unknown Source)
	at java.lang.Runtime.load0(Unknown Source)
	at java.lang.System.load(Unknown Source)
	at com.sun.glass.utils.NativeLibLoader.loadLibraryFullPath(NativeLibLoader.java:200)
	at com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:88)
	at com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:31)
	at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:73)
	at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:80)
	at com.sun.glass.ui.win.WinApplication$1.run(WinApplication.java:36)
	at com.sun.glass.ui.win.WinApplication$1.run(WinApplication.java:33)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.glass.ui.win.WinApplication.<clinit>(WinApplication.java:33)
	at com.sun.glass.ui.win.WinPlatformFactory.createApplication(WinPlatformFactory.java:20)
	at com.sun.glass.ui.win.WinPlatformFactory.createApplication(WinPlatformFactory.java:17)
	at com.sun.glass.ui.Application.Run(Application.java:103)
	at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:271)
	... 5 more

/cygdrive/c/Users/siegfried/Documents/WinOOP/Examples/JavaFX

[Darryl Burke]

Siegfried Heintze wrote:

Exception in thread "main" java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: C:\Program Files\Java\jdk1.7.0_11\jre\bin\glass.dll: Can't load AMD 64-bit .dll on a IA 32-bit platform

Looks like you have a 64 bit FX SDK, possibly one you downloaded and installed before FX was integrated with the Java JDK/JRE. If so, uninstalling it may fix the problem (you may also need to reinstall the JDK and JRE).

Also, it's generally preferred to use the -cp flag on the command line rather than set the system CLASSPATH.