This video explains how to set/change your compiler version and also how to change JRE version/setting.
Set java compiler version which you wish to work for your project in eclipse | Set Java Runtime Environment in eclipse based on your project requirements
If you are working on Java JDK 15 then you need to set your eclipse setting to run your code/project with java compiler version 15 and also you need to run your application on jDK 15 so you need to set your java run time environment to point to JDK 15 home path.
Eclipse with JDK 15 setup
#JavaBeam #eclipseSettings #compilerAndJREInEclipse #Java