Unable start java derby database with Java 7u51
It's not bug. Just a new security system from Java 7 update 51.
how to solve? According to this link, this is the best way you can.
Find out exactly where the java home is by executing this instruction from Netbean 7.4:
System.out.println(System.getProperty(“java.home”));
This is the output for my case:
C:\Program Files\Java\jdk1.7.0_51\jre
which is quite important for me, I was modifying another java.policy and took no effect and wasted me a couple of hours.
For reason of java.policy is an unix style file and read-only, I opened and edited it with notepadd++ and executed as administrator (under the same java home):
C:\Program Files\Java\jdk1.7.0_51\jre\lib\security\java.policy
Add only these lines into the file after the first grant:
grant { permission java.net.SocketPermission "localhost:1527", "listen"; };
Save the file, which is a little tricky for reason of the permission. But if you run notepad++ or any other edit program as administrator, you can solve the problem. Then try to connect the database from Netbeans, it works for me.
It works for me too :D