> do I have to pay for a license even though Java is open source? Most people use free OpenJDK builds (Adopt OpenJDK, Zulu OpenJDK, Oracle OpenJDK to name a fe

> do I have to pay for a license even though Java is open source? Most people use free OpenJDK builds (Adopt OpenJDK, Zulu OpenJDK, Oracle OpenJDK to name a few). There are some builds which require license, like Oracle Java. If you need some kind of advanced support, you have that option.