How do I download Java compiler?

1.

Top 10+ Best Java IDEs & Online Java Compilers [2022 Rankings]

The top 11 Free IDE for Java Coding, Development & Programming

You can download the latest OpenJDK release of Java from Oracle, for free , under an open source license from jdk.java.net. Oracle JDK 8 and Oracle JDK 11 are free for Personal, Development and other uses. Oracle JDK 17 and later release are available under a Oracle No-Fee Terms and Conditions License for all users.