Android Question Error running first program

I found this file in the jdk1.8.0_45 directory.

It seems I have several version of the SDK installed. Do i need to get rid of them and start again? Should I be using the ;latest version?

Regards
Pete

You can have many versions of Java installed on your computer. Choose the latest one under Tools - Configure Paths.

Thanks for that,

OK, I thought I'd download the latest version again, 1.8.0_45 but that does not have the javac.exe file in bin.

SO after copying across the .cfg file, I now get a different error;

Signing package file (debug key). Error
Exception in thread "main" java.lang.InternalError
at java.util.Currency$1.run(Currency.java:224)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.Currency.<clinit>(Currency.java:192)
at java.text.DecimalFormatSymbols.initialize(DecimalFormatSymbols.java:566)
at java.text.DecimalFormatSymbols.<init>(DecimalFormatSymbols.java:94)
at java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:157)
at java.text.NumberFormat.getInstance(NumberFormat.java:767)
at java.text.NumberFormat.getIntegerInstance(NumberFormat.java:439)
at java.text.SimpleDateFormat.initialize(SimpleDateFormat.java:664)
at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:653)
at java.text.DateFormat.get(DateFormat.java:772)
at java.text.DateFormat.getDateTimeInstance(DateFormat.java:547)
at java.text.MessageFormat.subformat(MessageFormat.java:1265)
at java.text.MessageFormat.format(MessageFormat.java:860)
at java.text.Format.format(Format.java:157)
at sun.security.tools.JarSigner.printCert(JarSigner.java:886)
at sun.security.tools.JarSigner.getAliasInfo(JarSigner.java:1818)
at sun.security.tools.JarSigner.run(JarSigner.java:228)
at sun.security.tools.JarSigner.main(JarSigner.java:105)
Caused by: java.io.FileNotFoundException: C:\Program Files\Java\jdk1.7.0_40\jre\lib\currency.data (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileInputStream.<init>(FileInputStream.java:101)
at java.util.Currency$1.run(Currency.java:198)
... 18 more
can't open C:\Program Files\Java\jdk1.7.0_40\jre\lib\tzmappings.


The currency.data file resides in the latter directory but not in 1.7.0_40!

Do I just keep copying across files for the newer version to the older? I do not understand where the problem is coming from

Regards
Pete

You don't need to copy any file.

Reinstall Java JDK and then configure the IDE to use the new version of the JDK.

I uninstalled all the SDK's and started again. It worked.

Thanks for you help
Pete