Java Articles - Page 19 of 540

TreeSet is a class that implements Set interface in Java. In TreeSet the elements are stored in sorted order as it is implemented internally using a sorted balanced tree called as binary search tree. The elements in the TreeSet are stored in ascending order by default. Union of sets contains all the elements from both sets. Intersection of sets contain all the elements which are commonly present in both sets. In this section, we will be discussing about how to get the union and intersection of two TreeSet using Java. What are the Union and Intersection of Sets? ... Read More

LinkedHashSet is a class provided by Java that implements Set Interface. The first element of a LinkedhashSet is nothing but the first element in the collection. In this article, we will discuss different approaches to get the first element from LinkedHashset. What is a LinkedHashSet? A LinkedHashSet is a collection which is a combination of HashSet collection and a LinkedList collection. A HashSet is an unordered collection which doesn't allow duplicates. But, a LinkedList is an ordered collection which stores duplicates Coming to LinkedHashSet as it is a combination of both HashSet and LinkedList it stores the elements in ... Read More

Motherboard Serial Number is an id assigned to the motherboard of a computer. It is generally used to track the computer system and also to identify when the system is lost or stolen. In this section, we will be discussing different approaches to find the Motherboard Serial Number for Windows and Linux machines using Java programming language. Motherboard is a very crucial part of a computer. It is the backbone of the computer. All the components in a computer communicate through the motherboard. Motherboard helps in determining the factors like the amount of RAM we are going to ... Read More

Computers can connect to a network and communicate with other devices using a hardware or software component known as Network Interface Controller (NIC). NIC helps in creating a layer which helps in transmitting and receiving data between two devices. MAC address known as Media Access Control address is a unique identifier of NIC. It is of 48 bits of hexadecimal digits. It is used by the data link layer to control access, ensure data integrity, and identify network devices. In this section, we will be learning about how to find a MAC address of a Windows and Linux machine using ... Read More

In Java, HashSet is a class which implements Set Interface. HashSet is a collection of unique elements which doesn’t store or allow us to store duplicate elements. In this section, we will be discussing about different approaches in java to find the first element and last element of a HashSet using Java programming Language. The HashSet class in java is implemented using a hash table. It uses hash code to retrieve data quickly from the table in HashSet, the order of elements is not preserved i.e., it doesn’t store the elements in the order in which we add elements ... Read More

IP Address, also known as the Internet Protocol Address is a unique identifier that is assigned to a device in a network to identify the devices in the network and establish a connection between them. In this section, we will learn how to find the IP Address of a Windows and Linux Machine using Java Code. The IP Address can be represented in two formats. One format is IPv4 which is a 32 format containing decimals and dots. It has two parts, one part is network ID which identifies the network and the other is host ID which identifies ... Read More

LinkedHashSet is a class provided by Java which Implements Set Interface. LinkedHashSet is implemented as a hash table with a linked list running through it, so it is more efficient that HashSet and also maintains orders. It is useful when you need a collection that maintains order and does not allow duplicates. In this section, we will discuss different approaches to get the elements from LinkedHashset by index. What is a LinkedHashSet? A LinkedHashSet is a collection which is a combination of HashSet collection and a LinkedList collection. A HashSet is an unordered collection and also doesn’t allow duplicates. ... Read More

The serial number of a CPU is a unique identifier which is given to a particular CPU by the manufacturer to each of them. Its main purpose is to track and identify the hardware for warranty claim. In this article, we are going to write a java program to get CPU serial number for windows machine. Central Processing Unit, in short CPU, is the brain of the computer. Using WMIC Command In this approach, we will use wmic command in java code. The wmic is a command line tool for working with Windows management. It stands for Windows Management Instrumentation ... Read More

Here, we will demonstrate the usage of static inner class using the Java program. Before diving deep into the topic, let us get acquainted with the term Static Inner Class . Static Inner Class An inner class is the one, which is defined within another class. A Static Inner Class is a nested class that is a static member of the outer class. Other static members can be used to access it without first instantiating the outer class. A static nested class lacks access to the instance variables and methods of the outer class, much like static member’s java. Example ... Read More

We will demonstrate how total marks and percentages are calculated using Java programs. The term total marks refer to the summation of all the available marks, while the term percentage refers to the number obtained by dividing the calculated marks by total marks and multiplying the resultant by 100. percentage_of_marks = (obtained_marks/total_marks) × 100 Problem Statement Given a Java program to calculate the total marks and percentage of a student in a given set of subject. Input marks = { 69, 88, 77, 89, 98, 100, 57, 78 } Output Total Marks is: 656 Total Percentage is: ... Read More