In Java, "Collection" (without an 's') is an interface that's a part of the Java Collections Framework. Now, what's an interface? Think of it as a set of rules that classes need to follow. So, when we say "Collection" in Java, we're talking about a set of rules that classes can follow to be considered a collection.
Java is a widely-used programming language that is known for its robustness, scalability, and platform independence. As an Java developer, it is very important to have a deep understanding of the language and its advanced concepts to excel in interviews. In this article, I am going to share some common and challenging interview questions related to Core Java topics. These questions will help you prepare well for your next Java interview.
In this post we will study what is strings in Java and why they are immutable. Let's start by understanding what strings are in Java
In Java, a string is a sequence of characters that is used to represent text.. Strings are immutable in Java that means once a string is created, its value cannot be changed. We will explore it later in the article.
In Java, there are different ways to create strings. You can use double quotes "" or the new keyword. We will see how to put strings together, which is called string combination. We will also discover efficient ways to combine strings using the + operator and the concat() method. Let's learn about these methods and when to use them.
In this post we are going to learn what is generic class with example. Generic class in java example.
A Generic class means in that class we can use any type as parameter(T). In this example we are using the T type parameter to create a generic class.
In this post we are going to create a class in Java with constructor. So let's see how to create a class in Java which contains constructor method.
First of all we need to know what is a constructor in Java.
In this post we will learn how to copy arrays in java. Copying arrays simply means copying one array elements into another array. There are two main ways to do this first by using loops and second by using methods.
In this post we will learn how to compare two arrays in java. But, before that we need to understand what comparing arrays really means. So without wasting more time lets get started.
How to print arrays in java:
To print array elements we first need to accept it from user. In this post we will learn how to accept array elements from user dynamically and print it on the output screen. Simple java program to insert elements in array.
In this post we will learn how to write a java program to sort array elements. How to sort arrays in java. Sorting array elements means storing or printing it in ascending or descending order. So let's see how to print given array elements in sorted manner.
In previous post we learnt how to print multiplication of given array elements. In this post we will learn how to print squares of given array elements. So let's get started... :)
In previous post we learnt how to print Sum of given array elements. In this post we will learn how to print multiplication of given array elements.
In previous post we learnt how to check given element is present in array or not. In this post we will learn how to print sum of given array elements. So let's get started... :)
1. Accept array limit from user store it in variable say lim.
2. Accept elements from user. Run a for loop from 0 to arr.length-1 and store elements one by one in array:
In previous tutorial we learnt how to accept and print array elements. In this post we will learn is given element is present in array or not, Java program to check whether given element is present in array or not.
Ex: Write a java program to calculate gross salary of an employee. How to write a java program to calculate gross salary of an employee using DA and HRA. Java program to calculate gross salary of an employee using DA and HRA.
We can calculate gross salary of an employee using following DA and HRA. The DA is 20% of the basic salary while the HRA is 30% of the basic salary and gross salary is addition of basic salary, DA and HRA.