Computer scienceProgramming languagesJavaCode organizationGeneric programmingGenerics essentials

Wildcards

Theory

Get and Put pinciple in practice

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Assume the following structure:

Type<Wildcard> structure;

Choose wildcard type to use according to the usage of the structure (Get and Put principle).

Match the items from left and right columns
get values out of a structure
put values into a structure
both get and put to/from a structure
super
don’t use a wildcard
extends
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