Java version and Brief History
Beginner Java, Java for so many versions is very confused, do a little note here, I wish to point out any errors.
Java was created by Sun Microsystems, the Sun was acquired by Oracle Corporation, also will become Oracle Java products.
In the year before the acquisition, Sun announced at the JavaOne conference for Java open source and released JavaJDK. After the acquisition by Oracle Corporation, the company is still in the introduction of such a commercial version of Oracle Java SE open source while the introduction of Open JDK, any You can obtain the source code, source code and by constructing a variant version was released to the network. There are a number of companies have launched their own variant version of OpenJDK, such AdoptOpenJDK, RedHat OpenJDK, Azul Zulu and so on. They are the same JDK source code is based.