java - How can I fix unsupported class file major

java 189 JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) Authors: Christine H. Flood, Roman Kennke: Owner: Roman Kennke: Type: Feature: Scope: ... Marking. Java SE 19 Archive Downloads. Go to the Oracle Java Archive page.. The JDK is a development environment for building applications using the Java programming language. The JDK includes

javaplay88, Ultimate Java (Episode 189).