JavaDB / derbyDB: access denied (“java.net.SocketPermission” “localhost:1527” “listen,resolve”)

Since java update 7u51 there are “better applet networking” changes.
So derbydb will not work in Netbeans 7.4 anymore out of the box.
You have to change the security policy of derbydb.

In MacOS open the terminal:

cd /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/lib/security

In Linux/Win you will have to change the path.

Make a backup of the policy-file:

sudo cp java.policy java.policy.backup

Edit the policy-file:

sudo nano java.policy

Add to the main permission section the following statement:

permission java.net.SocketPermission "localhost:1527", "listen,resolve";

Thank you to Wolfgang Mayr for hinting me.

Sources:
Update Release Notes
unable-to-start-derby-database-from-netbeans-7-4