Re: New Java 8 syntax?

Knute Johnson <>
Sat, 31 Jan 2015 09:32:18 -0800
On 1/31/2015 05:25, Arne Vajh??j 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


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.


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