java 13 interview questions and answers

The abs() method is used to calculate absolute values. In Core Java, the Math.abs() method is used to calculate the absolute value of a number. The abs() method returns the absolute value of its argument, which is the distance of the argument from zero. Here’s an example: java public class AbsoluteValueExample { public static void main(String[] args) … Read more

Yes, an exception can be rethrown. Yes, in Java, an exception can be rethrown. When a catch block catches an exception, it has the option to handle the exception locally or to rethrow it. If the catch block decides to rethrow the exception, it means that it doesn’t handle the exception itself, but instead, it … Read more

The File class is used to create objects that provide access to the files and directories of a local file system. The File class in Java is used to represent the information about files and directories. It does not provide the methods to perform file operations directly but is a part of the java.io package and provides … Read more

The paint() method supports painting via a Graphics object. The repaint() method is used to causepaint() to be invoked by the AWT painting thread. In Java, specifically in graphical user interface (GUI) programming using AWT or Swing, the paint() and repaint() methods serve different purposes. paint() method: The paint() method is part of the Component class (or its subclasses … Read more

A static variable is associated with the class as a whole rather than with specific instances of a class. Non-static variables take on unique values with each object instance. In Java, the terms “static” and “non-static” are used to describe different types of variables and methods. Here’s the difference between static and non-static variables: Static … Read more