Using Map and Lists. Simple
My prolem is very simple, but i'm beggining with java.
I have 10 key-values: "CUSTOMER_ID" , the others are not important
What is important is that I want to have different values under the same key CUSTOMER_ID
The structure should be like this:
Which structure can I use?
can I use Java Map?
and how to insert this values and how to load it?
Please show me simple code
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