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Optional<String> nonEmptyOptional = Optional.of("Vishwa Ratna");
String value = nonEmptyOptional.orElse(iAmStillExecuted());

public static String iAmStillExecuted(){
System.out.println("nonEmptyOptional is not NULL,still I am being executed");
return "I got executed";
}

Optional<String> emptyOptional = Optional.ofNullable(null);
String value = emptyOptional.orElse(iAmStillExecuted());
public static String iAmStillExecuted(){
System.out.println("emptyOptional is NULL, I am being executed, it is normal as 
per dictionary");
return "I got executed";
}