/Java/Caused by: java.lang.IllegalStateException: stream has already been operated upon or closed

Caused by: java.lang.IllegalStateException: stream has already been operated upon or closed

Supplier<Stream<String>> streamSupplier 
  = () -> Stream.of("A", "B", "C", "D");
Optional<String> result1 = streamSupplier.get().findAny();
System.out.println(result1.get());
Optional<String> result2 = streamSupplier.get().findFirst();
System.out.println(result2.get());

Source: baeldung.com

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