Let's go… Step 1: Installing Multiple Java Versions The last line of code will make Java 15 the default.To enable these Java version change commands on your system as well, follow this step-by-step guide. Sudo apt install oracle-java15-set-default Sudo add-apt-repository ppa:linuxuprising/java Run the following commands to install Oracle Java 15 on Ubuntu 19.10, Ubuntu 19.04, Ubuntu 18.10, Ubuntu 18.04 and other Ubuntu Derivatives: Oracle JDK 15 is offered under a commercial license for those who want commercial support or are using the Oracle JDK as part of an Oracle product or service.Oracle OpenJDK 15 is offered under the open source GNU General Public License v2, with the Classpath Exception (GPLv2+CPE).Oracle provides two binary releases of Java 15: JEP 373 Reimplement the legacy Datagram Socket API.JEP 381 Remove the Solaris and SPARC Ports.JEP 372 Remove the Nashorn JavaScript Engine.JEP 385 Deprecates the RMI Activation mechanism for future removal.JEP 385 Deprecate RMI Activation for Removal.JEP 374 disables biased locking by default and deprecate all related command-line options.JEP 374 Disable and deprecate biased locking.JEP 383 Foreign-Memory Access API – second incubator.
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