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Lambdas are anonymous functions (i.e. not having an identifier, like methods in a class) which can be used in a wide range of programming languages.

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Access to local variables of the enclosing scope The accepted Answer by Karl Bielefeldt is correct. I can add one more distinction: Scope The lambda code nested inside a method inside a class … calling code. To quote the Java Tutorial (emphasis mine): Like local and anonymous classes, lambda expressions can capture variables; they have the same access to local variables of the enclosing scope …
answered Jan 28 '17 by Basil Bourque