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History variables: Difference between revisions
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→{{header|Java Integer with History}}
(Added Java, both an integer-only and a Generic version) |
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==={{header|Java Integer with History}}===
This implementation does not allow the History Variable to be "empty". It can be assigned one or multiple "nulls", but it can never have an undefined value (such as being created and not initialized).
<lang
import java.util.LinkedList;
import java.util.List;
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</lang>
Test Program:
<lang
public static void main(String[] args) {
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