Closures in Java 7

2018-06-18 06:05:50

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Closure in Java 7 [closed] 7 answers

Have a look at http://www.javac.info/ .

It seems like this is how it would look:

boolean even = { int x => x % 2 == 0 }.invoke(15);

where the { int x => x % 2 == 0 } bit is the closure.

It really depends on what gets introduced, and indeed whether it will be introduced at all. There are a number of closure proposals of varying sizes.

See Alex Miller's Java 7 page for the proposals and various blog posts.

Personally I'd love to see closures - they're beautiful and incredibly helpful - but I fear that some of the proposals are pretty hairy.

In November 2009 there was a surprising u-turn on this issue, and closures will now be added to Java 7.

Update

Closures (AKA lambdas expressions) in Java 7 didn't happen. They were finally added in the first release of Java 8 in 2014.

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