1604 Views
In Java scope of a variable is the section of the program where the variable is attainable inside the area where they are created. Like C/C++, in Java, all identifiers are logical or statical examine, i.e.scope of a variable can be set at compile-time and independent of the function call stack.
Method ...
Anamika Gupta
May 02, 2022
1432 Views
As we know that Java is an object-oriented programming language. It is allied with classes and objects together with its attributes and methods.
For example: in real life, a Perfume is an object. The Perfume has attributes, such as smell and color, and methods, such as cold-extraction and Distillation.
The ...
Anamika Gupta
Dec 23, 2021
1659 Views
JTree class in java is a swing component and used to arrange the tree-structured data or hierarchical data. It is a complex component and has a root node an also called a parent node in the tree which is the top of all the nodes.A. node can have many children nodes if a node doesn't,t have any children ...
Anamika Gupta
Dec 22, 2021
1527 Views
Lambda expression is an advanced and primary feature of Java that was combined in Java SE 8. It is treated as a function, so the compiler does not create a .class file. It adds a clear and compressed way to perform one process of the interface by using an expression. It is very useful in the library ...
Anamika Gupta
Dec 20, 2021
1671 Views
Traversing in jquery means "move through".It is used to find or to select items you can start with one selection of items and move until it completes the selection of your desired item.
jQuery provides various methods that allow us to traverse the DOM.
The largest category of traversal ...
Anamika Gupta
Dec 17, 2021
1640 Views
Sorting is a way to arrange elements (objects) of a list or array in a certain order. The order may be in ascending or descending order. Another useful class in java.util package.
the java.util package is the Collections class, which include the sort() method for sorting lists alphabetically ...
Anamika Gupta
Dec 15, 2021
1551 Views
The size() method to define that how many times the loop should run. The looping through the principle of an ArrayList with a for loop
public class Main {
public static void main(String[] args) {
ArrayList<String> mobiles = new ArrayList<String>();
mobiles.add("Samsung");
...
Anamika Gupta
Dec 15, 2021
1581 Views
To delete an element, use the remove() method and refer to the index number:
import java.util.ArrayList;
public class Main {
public static void main(String[] args) {
ArrayList<String> mobiles = new ArrayList<String>();
mobiles.add("Samsung");
mobiles.add("Apple");
...
Anamika Gupta
Dec 14, 2021
1548 Views
By using the get() method we can access an element in the ArrayList, which is assigned to the index number:
import java.util.ArrayList;
public class Main {
public static void main(String[] args) {
ArrayList<String> mobiles = new ArrayList<String>();
mobiles.add("Samsung");
...
Anamika Gupta
Dec 14, 2021
1532 Views
In java.util package the ArrayList class is found which is used to resize Array.
The main difference between an ArrayList and a built-in array in Java is that the syntax is also slightly different and the size of the array cannot be modified. Whenever you want to you can add and remove elements from ...
Anamika Gupta
Dec 14, 2021
2331 Views
The String class maintain many efficiency for processing String. However , once a String object is build,its contents will remain same.String object are constant string and StringBuffer object are modified strings. Java can perform certain development involving String because it knows that these object ...
Anamika Gupta
Oct 03, 2018
2633 Views
Class String provides Substrings methods to allow a new String object to be build by copying part of an current String object . Each method returns a new String object.
letters.substring (20)
With the use of Substring method that takes one integer argument. This point specifies the starting ...
Anamika Gupta
Sep 28, 2018
2479 Views
Java provides a variety of methods for comparing String objects. It signifies one String to be greater than" or less than" another String, consider the method of alphabetizing a series of last names
Example :- We place the word "John" before "Smith" because ...
Anamika Gupta
Sep 27, 2018
3805 Views
Polymorphism means the object which as many forms.It is one of the feature of OOPs . With Polymorphism it is possible to design and implement system that are more easily extensible.
For example:- Suppose the rectangle has four side like quadrilateral ,squares,Parallelogram, and Trapezoid ...
Anamika Gupta
Sep 26, 2018
3512 Views
Inheritance work on tree like hierarchical structure. Inheritance is a form of reusability in which new classes are created from current classes by absorbing their attributes and behaviour and arrange these with capacity the new classes require.Inheritance are powerful techniques for dealing with software ...
Anamika Gupta
Sep 25, 2018