Unsupportedclassversionerror is reported when starting jar package. How to repair it

First, check the complete exception log

Exception in thread "main" java.lang.UnsupportedClassVersionError: run/halo/app/Application has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Roughly speaking , This jar The package has been updated by the latest version of Java Runtime （ Class file version 55.0） compile , Current version Java Only up to... Are recognized at runtime 52.0 Class file version .

Popular speaking , It's that we use Java 11 Compiled our class , And try to use Java 8 Run it .

Solution , Use java11 Environment operation

Java Version number reference

45 = Java 1.1

46 = Java 1.2

47 = Java 1.3

48 = Java 1.4

49 = Java 5

50 = Java 6

51 = Java 7

52 = Java 8

53 = Java 9

54 = Java 10

55 = Java 11

56 = Java 12

57 = Java 13