What is the difference between ellipse and polygon in JavaFX?
An ellipse is a closed plane figure in which the two diameters are not of equal length, while a polygon is a shape composed of an enclosed series of straight lines in JavaFX. An ellipse is a basic oval shape that cannot be edited, while a polygon can have any number of sides and vertices, and is editable.
What is jlist class in Java?
The JList class is a Swing based component that is used to create lists in a graphical user interface. It can be used to display lists of items for selection and allows the user to select one or more items from the list. It also allows the user to deselect items from the list.
What are run-time errors in Java?
Run-time errors in Java are errors that occur when a program is executing that cause the program to terminate abnormally. This can be caused by attempting to access an invalid memory address, attempting to divide by zero, using incorrect data types in an operation, or trying to access a member of a non-existent object.
What is closureparam in Java?
Closureparam is a feature of the Java language that allows a method to capture the state of a parameter that has been passed to it. The captured state can then be used in the method's body to modify the parameter's value. Closureparam is used to create and return closures, which are pieces of code that can be executed at a later time.
You can use the pop() or shift() methods to remove elements from the beginning or end of an array respectively. You can also use the splice() method to remove elements from specific positions in the array. To remove specific values from an array, use the filter() method.
Callback: A callback is a function that is passed as an argument to another function and is executed after its parent function has completed. A callback is used to extend the functionality of a given function, by allowing the user to add their own code before or after the original function runs.
Promise: A Promise is an object representing the eventual completion or failure of an asynchronous operation. In simpler terms, Promises represent the result of an asynchronous task, which can either resolve (successful completion) or reject (unsuccessful completion) a certain value. Promises allow for better asynchronous code by making the code simpler and easier to debug, due to the explicit feedback on the success or failure of the asynchronous operation.
Why were default and static methods added to interfaces in Java 8?
Default and static methods were added to interfaces in Java 8 to allow developers to add new functionality to existing interfaces without breaking existing code. By making existing methods in interfaces default or static, developers can easily create backwards compatible interfaces that maintain a consistent API. This makes it easier to add functionality to existing interfaces, eliminating the need to change existing code or create new subclasses.
What is properties in Java?
Properties in Java are key-value pairs that describe the configuration of a Java program. They are typically used to store information about the program, such as its version number or the location of certain files. Properties are stored in an external file using a format that can be read by both humans and machines. The information stored in a properties file can then be retrieved and used by the program at runtime.