Create an array to which you want to store the existing array with the same length. A 2d array is an array of one dimensional arrays therefore, to copy (or, to perform any operation on) the elements of the 2d array you need two loops one nested within the other. Where, the outer loop is to traverse through the array of one dimensional arrays and, the inner loop is to traverse through the elements of a particular one dimensional array.Examplepublic class Copying2DArray {    public static void main(String args[]) {       int[][] myArray = {{41, 52, 63}, {74, ... Read More

Yes, we can overload the main method in Java, but When we execute the class JVM starts execution with public static void main(String[] args) method. Example Live Demo public class Sample{ public static void main(){ System.out.println("This is the overloaded main method"); } public static void main(String args[]){ Sample obj = new Sample(); obj.main(); } } Output This is the overloaded main method

Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. If you observe the following example, it contains two methods with same name, different parameters and if you call the method by passing two integer values the first method will be executed and, if you call by passing 3 integer values then the second method will be executed.It is not possible to decide to execute which method based on the return type, therefore, overloading is not possible just by changing the return type of the method. Example ... Read More

When super class and sub class contains same method including parameters and if they are static. The method in the super class will be hidden by the one that is in the sub class. This mechanism is known as method hiding. Example Live Demo class Demo{ public static void demoMethod() { System.out.println("method of super class"); } } public class Sample extends Demo { public static void demoMethod() { System.out.println("method of sub class"); } public static void main(String args[] ) { Sample.demoMethod(); } } Output method of sub class

When super class and the sub class contains same instance methods including parameters, when called, the super class method is overridden by the method of the sub class. WIn this example super class and sub class have methods with same signature (method name and parameters) and when we try to invoke this method from the sub class the sub class method overrides the method in super class and gets executed. Example Live Demo class Super{ public void sample(){ System.out.println("Method of the Super class"); } } public ... Read More

Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call.Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.

Array is a container which can hold a fix number of items and these items should be of the same type. Most of the data structures make use of arrays to implement their algorithms. Following are the important terms to understand the concept of Array. Element − Each item stored in an array is called an element. Index − Each location of an element in an array has a numerical index, which is used to identify the element. Example Live Demo public class ArrayExample { public static void main(String args[]){ int myArray[] = {44, 69, 89, 635}; for (int i = 0; i

There are two types of arrays in Java they are − Single dimensional array − A single dimensional array of Java is a normal array where, the array contains sequential elements (of same type) − int[] myArray = {10, 20, 30, 40} Example Live Demo public class TestArray { public static void main(String[] args) { double[] myList = {1.9, 2.9, 3.4, 3.5}; // Print all the array elements ... Read More

In Java, a multi-dimensional array is nothing but an array of arrays.2D array − A two-dimensional array in Java is represented as an array of one-dimensional arrays of the same type. Mostly, it is used to represent a table of values with rows and columns −Int[][] myArray = {{10, 20, 30}, {11, 21, 31}, {12, 22, 32} }In short, a two-dimensional array contains one-dimensional arrays of elements. It is represented by two indices where the first index denotes the position of the array and the second index represents the position of the element within that particular array − Example ... Read More

Python allows dictionaries to be sorted using the built-in sorted() function. In this article, we will explore different ways to sort a dictionary in Python by its values. Sort a Dictionary Using itemgetter() method When we use the sorted() function along with the itemgetter() method of the operator module, the dictionary will be sorted by its values. The itemgetter() function returns a callable object that fetches an item from its operand using the provided index. Example Following is an example that shows how to sort a dictionary by its values using itemgetter() along with the sorted() function - from operator import ... Read More