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Operators Part - 2

Deepika Sahu answered on December 29, 2022 Popularity 1/10 Helpfulness 1/10

answer Operators Part - 2

related Operators Part - 1

Operators Part - 2

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class MoreOperations {

	public static void main(String[] args) {

		//ifPresent
		
		Optional<String> optional = Optional.of("Value");
		
		optional.ifPresent(val -> System.out.println("This is a "+ val));
		
		//ifPresentOrElse
		
		Optional.empty()
		.ifPresentOrElse(System.out :: println, () -> System.out.println("Value is absent"));
		
		//stream
		
		Stream<String> stream = optional.stream();
		
		Optional.empty().stream()
		.forEach(System.out :: println);
		
		//or
		
		optional.or(() -> Optional.of("New Value"))
		.ifPresent(System.out :: println);
		
		
		Optional.empty()
		.or(() -> Optional.of("New Value"))
		.ifPresent(System.out :: println);
		//Optional.empty().or(() -> null).ifPresent(System.out :: println);
		
		//equals
		
		//optional
		//either both are empty
		//or if the values in optionals are equal to each other via equals method
		
		
		System.out.println(optional.equals(Optional.of("Value")));
		
		//hashcode
		
		System.out.println(Optional.empty().hashCode());
		
	}

}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java operators

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

Closely Related Answers

Operators Part - 1

Comment

class Operations {

	public static void main(String[] args) {
		
		Optional<String> optional = Optional.of("Value");
		
		//map()
		
		String orElse = optional.map(val -> "Replaced").orElse("Empty");
		System.out.println(orElse);
		
		
		//filter()
		
		Optional<String> filter = optional.filter(val -> val.equalsIgnoreCase("Value"));
		System.out.println(filter.get());
		
		
		//flatMap()
		
		Optional<String> flatMap = optional.flatMap(val -> Optional.of("Replaced By FlatMap"));
		System.out.println(flatMap.get());
		
		
	}

}

Popularity 2/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java operators

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

Operators Part - 2

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