Optional.ofNullable() Method in Java is used for the implementation of both null and not null values. The optional.empty() method appears for the null values
How to Implement a Java Callback Function
To implement a callback function in Java, the approach involves creating a function as a first-class entity, which is then invoked from a second class.
How to Handle Covariant Return Type in Java
The covariant return type in Java deals with non-primitive data types like arrays, lists, and classes. It makes the code look cleaner and more usable.
How to Get Current Date and Time using Java Instant now() Method
In Java, the “Instant.now()” method is used to get the current date and time. It uses the UTC clock to get the current instant.
How to Employ Static Import in Java
Static import in Java has access to all static methods/fields. It works in such a way that all static data is imported without calling each class name separately.
How to Get Year from Date in Java
To get a year from the date, the calendar class, Local Date class, String.split() method, and SimpleDateFormat class are used in Java
How to Implement Tail Recursion in Java
Tail recursion occurs when a recursive call is made and ends afterward and has nothing to perform after the completion of this recursive call.
How to Implement ActionListener in Java
ActionListener belongs to the “java.util.event” package. To handle user requests efficiently the action listener interface of Java has to be implemented.