SpringBoot Exception in thread "main" java.lang.AbstractMethodError: org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.supportsSourceType(Ljava/lang/Class;)Z

In my springboot project, I used a jar package provided by others. The springboot version used by this jar is 2.4.1. However, my springboot project uses 1.4.5, and an error is reported when I start the program.

Exception in thread "main" java.lang.AbstractMethodError: org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.supportsSourceType(Ljava/lang/Class;)Z
    at org.springframework.context.event.GenericApplicationListenerAdapter.supportsSourceType(GenericApplicationListenerAdapter.java:79)
    at org.springframework.context.event.AbstractApplicationEventMulticaster.supportsEvent(AbstractApplicationEventMulticaster.java:282)
    at org.springframework.context.event.AbstractApplicationEventMulticaster.retrieveApplicationListeners(AbstractApplicationEventMulticaster.java:214)
    at org.springframework.context.event.AbstractApplicationEventMulticaster.getApplicationListeners(AbstractApplicationEventMulticaster.java:185)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:128)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:72)
    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:338)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:309)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1187)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1176)
    at com.ist.parking_client.ParkingClientApplication.main(ParkingClientApplication.java:12)

Comment From: philwebb

Spring Boot 1.4 is out of support so you should upgrade as soon as possible. You also can't mix different minor versions since you're likely to get method errors such as this.