Java License Key Generate Do You Know If Java Free?

Do you know if java free? - java license key generate

I want to know if Java is free? Can I use my own program and runs on a Java-enabled computer for free and without royalties? When I create a website using Java technology, you know, if an application service for free, be free to Tomcat? SO Published makes this software free? If so, what is its name. If you know of others? Finally, you are aware that the use of all charges JAVA.