Groovy uses Runnable to implement multithreading

Code 1:

package jerry;

Runnable run = { println 'run in thread: ' + Thread.currentThread().getId() }

run.run();
println "main thread:" + Thread.currentThread().getId();
// list.each { println it } // or list.each(this.&println)
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Test results:

Call Runnable’s run method directly, and the code inside the method is also executed in the main thread:

Code 2:

package jerry;

Runnable run = { println 'run in thread: ' + Thread.currentThread().getId() }

new Thread(run).start();

println "main thread:" + Thread.currentThread().getId();
// list.each { println it } // or list.each(this.&println)
Copy the code

The Runnable body is executed in the newly started thread:

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