How to know the JDK minimum required version for my API

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I'm writing a Java API where I use many library. I want to know what's the minimum version of JDK that we must have to use my API. In my POM I have this :

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
        <version>2.5.1</version>
           <configuration>
                <source>1.5</source>
                <target>1.4</target>
            </configuration>  
      ...
</plugin>

If I put 1.4 as source version I get error (annotations). Like this I can generate my Jar file. My problem is that I have seen that one of the library I use require 1.6 and I'm targeting 1.4. So why I have succeeded to generate my Jar? Does maven verify the required version of each dependency?

asked 43 secs ago

user230137

417