java 13 interview questions and answers

A local inner class may be final or abstract. In Java, a local inner class is a class defined within a block of code, typically within a method. Local inner classes can have the following modifiers: Final: A local inner class can be marked as final, which means it cannot be extended by other classes. Abstract: A local … Read more

The Collection interface provides support for the implementation of a mathematical bag – an unordered collection of objects that may contain duplicates. In Java, the Collection interface is a part of the Java Collections Framework and is present in the java.util package. It is at the top of the hierarchy of collection interfaces. The Collection interface represents … Read more

Java uses layout managers to lay out components in a consistent manner across all windowing platforms. Since Java’s layout managers aren’t tied to absolute sizing and positioning, they are able to accomodate platform-specific differences among windowing systems. In Java, layout managers provide several advantages over traditional windowing systems when it comes to designing graphical user … Read more

The elements of a GridBagLayout are organized according to a grid. However, the elements are of different sizes and may occupy more than one row or column of the grid. In addition, the rows and columns may have different sizes The elements of a GridBagLayout are of equal size and are laid out using the squares of a grid. … Read more

A component can handle its own events by implementing the required event-listener interface and adding itself as its own event listener. In Java, GUI components can handle their own events by implementing event listener interfaces. The most common way to handle events for GUI components is by implementing listener interfaces such as ActionListener, MouseListener, KeyListener, … Read more