Simple code example of closure in Java

1、 Definition of closure.

Many different people have defined closures. Here are some.

# is a function that references a free variable. This function is usually defined in another external function and references variables in the external function. --<< wikipedia>>

# is a callable object that records some information from the scope in which it was created. --<< Java programming ideas > >

# is an anonymous code block that can accept parameters and return a return value. It can also reference and use variables defined in the visible field around it-- Groovy ['ru:vi]

# is an expression that has free variables and the context in which they are bound.

A # closure allows you to encapsulate some behavior, pass it around like an object, and it can still access the context when it was first declared.

# is an expression (usually a function) that has multiple variables and an environment bound to them, so these variables are also part of the expression.

A # closure is a code block that can contain free (unbound) variables; these variables are not defined in this code block or any global context, but in the context in which the code block is defined.

2、 Simple example of closure:

summary

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