The implementation is licensed under the GPL-2.0-only with a linking exception.

1 It is the result of an effort Sun Microsystems began in 2006. Note that the JRE includes components not required by the Java SE specification, including both standard and non-standard Java components. OpenJDK ( Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). JRE 7 provides the libraries, the Java Virtual Machine (JVM), and other components to run applets and applications written in the Java programming language. JDK 7 is a superset of JRE 7, and contains everything that is in JRE 7, plus tools such as the compilers and debuggers necessary for developing applets and applications. Oracle Java SE Embedded also extends Oracle Java SE to non-general purpose desktop computers and servers. To use such JDK ports you must accept the applicable Oracle Technology Network Developer License Agreement. Oracle has two products that implement Java Platform Standard Edition (Java SE) 7: Java SE Development Kit (JDK) 7 and Java SE Runtime Environment (JRE) 7. Oracle will not post further updates of Java SE 8 to its public download sites for commercial use after January 2019. Oracle Java SE Embedded includes ported versions of the Java Development Kit (JDK) for specialized hardware.

Oracle java se development kit 7