In Java, both HashMap and TreeMap are used for key-value pair storage. However, there are some differences between them: Ordering: HashMap does not maintain any order for the elements, while…
We can implement a custom class that behaves like an array by creating a class that has an array as a private field, and implements the necessary methods to access…
What is the difference between an interface and an abstract class in Java? In Java, an interface and an abstract class are both used to define a contract for classes…
In Java, a String is an immutable object that represents a sequence of characters. It means once a String is created, its value cannot be changed, any operation that appears…
In this post, we will see java is pass by value or reference. In Java, method arguments are passed by value. This means that when you pass an argument to…
1. Assume you have two instances of Student Object. Which is following array declaration is correct ? Student students(student1, student2}); Student [] students(student1,student2); Student students = [student1,student2]; Student [] students…
1. What exception will be occurred with below code? int a = 100; int b = getSumOfProducts(); // This method returns 0 values int c = a/b; NullPointerException ArithmeticException IOException…
What is the file extension for Java Compile file? (Answer D: .class) A) .bytecode B).java C) .javac D) .class What is default imported package into class or what package is…
