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New Java 8 syntax?

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  New Java 8 syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-01-30 21:18 -0800
    Re: New Java 8 syntax? Arne Vajhøj <arne@vajhoej.dk> - 2015-01-31 08:25 -0500
      Re: New Java 8 syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-01-31 09:32 -0800
    Re: New Java 8 syntax? Jeff Higgins <jeff@invalid.invalid> - 2015-01-31 12:25 -0500
      Re: New Java 8 syntax? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-01-31 09:34 -0800

#30957 — New Java 8 syntax?

So I thought that the ; was optional if you had only one statement but 
it won't compile.  If you have a block then the ;s are required.

public class test {
     public static void main(String... args) {

         new Thread(() -> System.out.println("hello world!") ).start();

         new Thread(() -> { System.out.println("goodbye"); } ).start();
     }
}

I bought a pretty good book, Java 8 Lambdas by Richard Warburton.

Thanks,

knute...

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#30960

On 1/31/2015 12:18 AM, Knute Johnson wrote:
> So I thought that the ; was optional if you had only one statement but
> it won't compile.  If you have a block then the ;s are required.
>
> public class test {
>      public static void main(String... args) {
>
>          new Thread(() -> System.out.println("hello world!") ).start();
>
>          new Thread(() -> { System.out.println("goodbye"); } ).start();
>      }
> }
>
> I bought a pretty good book, Java 8 Lambdas by Richard Warburton.

The code above builds fine with both Oracle JDK and Eclipse compiler
here.

Arne

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#30962

On 1/31/2015 05:25, Arne Vajhøj wrote:
> On 1/31/2015 12:18 AM, Knute Johnson wrote:
>> So I thought that the ; was optional if you had only one statement but
>> it won't compile.  If you have a block then the ;s are required.
>>
>> public class test {
>>      public static void main(String... args) {
>>
>>          new Thread(() -> System.out.println("hello world!") ).start();
>>
>>          new Thread(() -> { System.out.println("goodbye"); } ).start();
>>      }
>> }
>>
>> I bought a pretty good book, Java 8 Lambdas by Richard Warburton.
>
> The code above builds fine with both Oracle JDK and Eclipse compiler
> here.
>
> Arne
>
>

OK, I wasn't clear again.  I thought that in the statement

   new Thread(() -> System.out.println("hello world!") ).start();

the semicolon after the System.out.println("hello world!"); was 
optional?  Meaning that

   new Thread(() -> System.out.println("hello world!"); ).start();

would compile.  Not that leaving off the semicolon was required.

k...

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#30961

On 01/31/2015 12:18 AM, Knute Johnson wrote:
> So I thought that the ; was optional if you had only one statement but
> it won't compile.  If you have a block then the ;s are required.
>
> public class test {
>      public static void main(String... args) {
>
>          new Thread(() -> System.out.println("hello world!") ).start();
>
>          new Thread(() -> { System.out.println("goodbye"); } ).start();
            JLS 8 - 14.8 ExpressionStatement
            Certain kinds of expressions may be used as statements by
            following them with semicolons.
            I don't see any diffs thereabouts in the
            "PDF with diffs from Java SE 7 Edition"

>      }
> }
>
> I bought a pretty good book, Java 8 Lambdas by Richard Warburton.

I have a small collection (~3 or 4) of  O'Reilly books that I keep
fairly handy and a much larger collection of one readers gathering dust.
Will Java 8 Lambdas become a reference or dust collector?

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#30963

On 1/31/2015 09:25, Jeff Higgins wrote:
>> I bought a pretty good book, Java 8 Lambdas by Richard Warburton.
>
> I have a small collection (~3 or 4) of  O'Reilly books that I keep
> fairly handy and a much larger collection of one readers gathering dust.
> Will Java 8 Lambdas become a reference or dust collector?

I have a large collection of dusters that were once definite readers. 
Time will tell on this one.

k...

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