Java-在2个类之间创建“多对多”关系

Question

I will try to explain my problem based on an example:

We have one class called " Car ", and one called " Worker ".

One car gets build by multiple workers, while one worker has built multiple cars.

My question is:

How do I create some kind of "many-to-many"-relationship between those two classes, like commonly used with databases, WITHOUT importing any library except for the java.lang.* and java.io.* packages, which means that "List" is thereby excluded, because it is in java.util.*

Thanks in advance :)

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Edit for further explaination:

In databbases, you normally have a third table to split this "mtm"-relationship, so I thought at something like this on my picture. Would this be possible?

Answer 1

Obviously, in this case lists would be the best choice, but if you cannot use them, you could use arrays, something like this:

class Car {  
   private Worker[] builtBy;
   ...  
}

class Worker {  
   private Car[] carsBuilt;
   ...  
}

However, the main disadvantage is that arrays are fixed-size so if you need to add more elements to the array than the initially allocated amount, you would have to create a new one and copy the contents there.