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Java-Optional

15 posts

Optional toString() method in Java with examples

Last Updated: 30 July 2019

The toString() method of java.util.Optional class in Java is used to get the string representation of this Optional instance. Syntax:public String toString()Parameters: Th...read more

Java - util package

Optional empty() method in Java with examples

Last Updated: 30 July 2019

The empty() method of java.util.Optional class in Java is used to get an empty instance of this Optional class. This instance do not contain any value.Syntax:public static...read more

Java - util package

Optional of() method in Java with examples

Last Updated: 30 July 2019

The of() method of java.util.Optional class in Java is used to get an instance of this Optional class with the specified value of the specified type. Syntax:public static ...read more

Java - util package

Optional ofNullable() method in Java with examples

Last Updated: 30 July 2019

The ofNullable() method of java.util.Optional class in Java is used to get an instance of this Optional class with the specified value of the specified type. If the specif...read more

Java - util package

Optional filter() method in Java with examples

Last Updated: 30 July 2019

The filter() method of java.util.Optional class in Java is used to filter the value of this Optional instance by matching it with the given Predicate, and then return the ...read more

Java - util package

Optional get() method in Java with examples

Last Updated: 30 July 2019

The get() method of java.util.Optional class in Java is used to get the value of this Optional instance. If there is no value present in this Optional instance, then this ...read more

Java - util package

Optional isPresent() Method in Java

Last Updated: 24 April 2025

The isPresent() method of the java.util.Optional class is used to check if a value is present in the Optional object. If there is no value present in this Optional instanc...read more

Java - util package

Optional stream() method in Java with examples

Last Updated: 30 July 2019

The stream() method of java.util.Optional class in Java is used to get the sequential stream of the only value present in this Optional instance. If there is no value pres...read more

Java - util package

Optional orElse() method in Java with examples

Last Updated: 30 July 2019

The orElse() method of java.util.Optional class in Java is used to get the value of this Optional instance, if present. If there is no value present in this Optional insta...read more

Java - util package

Optional orElseGet() Method in Java

Last Updated: 14 April 2025

TheorElseGet()method ofjava.util.Optional classin Java is used to get the value of this Optional instance if present. If there is no value present in this Optional instanc...read more

Java - util package

Optional orElseThrow() method in Java with examples

Last Updated: 30 July 2019

The orElseThrow() method of java.util.Optional class in Java is used to get the value of this Optional instance if present. If there is no value present in this Optional i...read more

Java - util package

Optional equals() method in Java with Examples

Last Updated: 30 July 2019

The equals() method of java.util.Optional class in Java is used to check for equality of this Optional with the specified Optional. This method takes an Optional instance ...read more

Java - util package

Optional hashCode() method in Java with examples

Last Updated: 30 July 2019

The hashCode() method of java.util.Optional class in Java is used to get the hashCode value of this Optional instance. If there is no value present in this Optional instan...read more

Java - util package

Optional or() method in Java with examples

Last Updated: 30 July 2019

The or() method of java.util.Optional class in Java is used to get this Optional instance if any value is present. If there is no value present in this Optional instance, ...read more

Java - util package

Optional ifPresentOrElse() method in Java with examples

Last Updated: 30 July 2019

The ifPresentOrElse(Consumer, Runnable) method of java.util.Optional class helps us to perform the specified Consumer action the value of this Optional object. If a value ...read more

Java - util package