OpenJDK (Open Java Development Kit) is a free and open source implementation of the Java Platform, Standard Edition (Java SE). It is the result of an effort Sun Microsystems began in 2006. It’s develop by Oracle Corporation, OpenJDK & Java Community, Red Hat, Azul Systems, IBM, Apple Inc, SAP AG.
Now, Oracle Announces Change of Way to Earn Money with Java SE 8 for commercial use the original purchase of a single payment. It also includes annual support. Switch to annual membership is called Java SE Subscription. Will open for purchase in July 2018 the price is $ 25 per month for a server and $ 2.50 for a PC. Buy one year minimum and if you buy a lot of discounts, But for those who use Java SE privately or non-commercial are not included under these conditions.