Lambdas - Revision history

JaroslavTulach at 17:32, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:32:44 GMT

←Older revision		Revision as of 17:32, 24 September 2013
Line 54:		Line 54:
	</source>		</source>

-	[[NetBeans]] own source code sticks (and will stick) with [[JDK]]7 for a while. As such I don't have much chances to use [[lambdas]], but I can say I can write [[lambdas]], now!	+	[[NetBeans]] own source code sticks (and will stick) with [[JDK]]7 for a while. As such I don't have much chances to use [[lambdas]], but I can say I can write [[lambdas]], now (of course only with massive help from the [[NetBeans]] IDE)!

-	Just one thing I don't understand? Why people claim [[NetBeans]] IDE does not understand [[lambdas]]?	+	Just one thing I don't understand: Why people claim [[NetBeans]] IDE does not understand [[lambdas]]?

JaroslavTulach at 17:31, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:31:55 GMT

←Older revision		Revision as of 17:31, 24 September 2013
Line 54:		Line 54:
	</source>		</source>

-	[[NetBeans]] own source code sticks (and will stick) with [[JDK]]7. As such I don't have much chances to use [[lambdas]], but I can say I can write [[lambdas]], now!	+	[[NetBeans]] own source code sticks (and will stick) with [[JDK]]7 for a while. As such I don't have much chances to use [[lambdas]], but I can say I can write [[lambdas]], now!

	Just one thing I don't understand? Why people claim [[NetBeans]] IDE does not understand [[lambdas]]?		Just one thing I don't understand? Why people claim [[NetBeans]] IDE does not understand [[lambdas]]?

JaroslavTulach at 17:31, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:31:25 GMT

←Older revision		Revision as of 17:31, 24 September 2013
Line 40:		Line 40:
	[[Image:Lambdas.png]]		[[Image:Lambdas.png]]

-	after applying the hint I finally got ~~correct~~ [[~~lambdas~~]] syntax:	+	after applying the hint I finally got [[lambda]] syntax right:

	<source lang="java">		<source lang="java">

JaroslavTulach at 17:30, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:30:21 GMT

←Older revision		Revision as of 17:30, 24 September 2013
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-	[[Lambdas]] are [[Java]] implementation of [[Closures]] and are coming ~~with~~ [[JDK]]8.	+	[[Lambdas]] are [[Java]] implementation of [[Closures]] and are coming in [[JDK]]8.

	== Don't Know the Syntax? ==		== Don't Know the Syntax? ==

JaroslavTulach at 17:29, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:29:17 GMT

←Older revision		Revision as of 17:29, 24 September 2013
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	and suddenly a hint appeared:		and suddenly a hint appeared:
		+
		+	[[Image:Lambdas.png]]
		+
		+	after applying the hint I finally got correct [[lambdas]] syntax:
		+
		+	<source lang="java">
		+	public class LambdaTest {
		+	static void doRun(Runnable r) {
		+	r.run();
		+	}
		+
		+	public static void main(String... args) {
		+	doRun(() -> System.out.println("Hello World!"));
		+	}
		+	}
		+	</source>
		+
		+	[[NetBeans]] own source code sticks (and will stick) with [[JDK]]7. As such I don't have much chances to use [[lambdas]], but I can say I can write [[lambdas]], now!
		+
		+	Just one thing I don't understand? Why people claim [[NetBeans]] IDE does not understand [[lambdas]]?

JaroslavTulach at 17:24, 24 September 2013

JaroslavTulach — Tue, 24 Sep 2013 17:24:16 GMT

←Older revision		Revision as of 17:24, 24 September 2013
Line 23:		Line 23:
	</source>		</source>

-	No luck either. I gave up and rewrote the code to old good inner class syntax:	+	No luck either. I gave up and rewrote the code to old good verbose but familiar inner class syntax:

	<source lang="java">		<source lang="java">
-	doRun(new Runnable() { public void run() {	+	public static void main(String... args) {
-	System.out.println("Hello World!");	+	doRun(new Runnable() {
-	}});	+	@Override
		+	public void run() {
		+	System.out.println("Hello World!");
		+	}
		+	});
		+	}
	</source>		</source>

	and suddenly a hint appeared:		and suddenly a hint appeared:

JaroslavTulach: New page: Lambdas are Java implementation of Closures and are coming with JDK8. == Don't Know the Syntax? == Yesterday I had a duty at NetBeans JavaOne2013 booth. Somebody ...

JaroslavTulach — Tue, 24 Sep 2013 17:21:09 GMT

New page: Lambdas are Java implementation of Closures and are coming with JDK8. == Don't Know the Syntax? == Yesterday I had a duty at NetBeans JavaOne2013 booth. Somebody ...

New page

[[Lambdas]] are [[Java]] implementation of [[Closures]] and are coming with [[JDK]]8.

== Don't Know the Syntax? ==

Yesterday I had a duty at [[NetBeans]] [[JavaOne2013]] booth. Somebody asked whether [[NetBeans]] support [[lambda]]. ''Sure, [[NetBeans]] 7.4 do!'' was my answer. But how to demonstrate that? I tried:

<source lang="java">
class LamdaTest {
static void doRun(Runnable r) {
r.run();
}

public static void main(String... args) {
doRun({ System.out.println("Hello World!"); });
}
}
</source>

it did not compile. Then I tried to change the lambda line to:

<source lang="java">
doRun( => { System.out.println("Hello World!"); });
</source>

No luck either. I gave up and rewrote the code to old good inner class syntax:

<source lang="java">
doRun(new Runnable() { public void run() {
System.out.println("Hello World!");
}});
</source>

and suddenly a hint appeared: