// patterns/TestSingle.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

public class TestSingle {

public static void main(String[] args) {

Single<String> ss = new Single<>("hello");

System.out.println(ss.get());

try {

Single<String> ss2 = new Single<>("world");

} catch(Exception e) {

System.out.println(e.getMessage());

}

}

}

/* Output:

hello

Attempt to reassign Single<String>

*/