New to Java

Hello everyone
sorry if i post that in the wrong place but i tried to find any contact us for this site but can not find any

there some typo and errors in this https://dev.java

1. in this page https://dev.java/oop/#class there repeat paragraph

here it say

`You may have noticed that the Bicycle class does not contain a main() method. That is because it is not a complete application; it is just the blueprint for bicycles that might be used in an application. The responsibility of creating and using new Bicycle objects belongs to some other class in your application. You may have noticed that the Bicycle class does not contain a main() method. That is because it is not a complete application; it is just the blueprint for bicycles that might be used in an application. The responsibility of creating and using new Bicycle objects belongs to some other class in your application.`
this part repeat this twice
`You may have noticed that the Bicycle class does not contain a main() method. That is because it is not a complete application; it is just the blueprint for bicycles that might be used in an application. The responsibility of creating and using new Bicycle objects belongs to some other class in your application.`

2. in this page https://dev.java/learn/creating-primitive-type-variables-in-your-programs/#anchor_1 when they define the int the said that it possible to use unsigned int
   `Use the add(element) class to use int data type as an unsigned integer`

and the add element was linked to hashset class https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/HashSet.html#add(E)

i guess it mean the Integer class https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html not the hashset one that they mentioned

not sure where to report those error so hope someone help and have a nice day evereyone