Programming Articles - Page 1280 of 3363

In this post, we will understand the difference between packages and interfaces in Java.PackagesIt is a group of classes and/or interfaces that are together.It can be created using the "Package" keyword.It can be imported.It can be done using the "import" keyword.Examplepackage package_name; public class class_name {    .    (body of class)    . }InterfacesIt is a group of abstract methods and constants.It can be created using the "Interface" keyword.It can be extended by another interface.It can also be implemented by a class.It can be implemented using the ‘implement’ keyword.Exampleinterface interface_name { variable declaration; ... Read More

Swap two arrays without using a temporary variable. We will use arithmetic and bitwise Operators instead of a third variable. The logic to read the first array is as follows − printf("enter first array ele:"); for(i = 0; i < size; i++){ scanf("%d", &first[i]); } The logic to read the second array is as follows − printf("enter first array ele:"); for(i = 0; i < size; i++){ scanf("%d", &first[i]); } The logic to swap the two arrays without using a third variable is as follows − for(i = 0; i < size; i++){ ... Read More

Palindrome number is a number which remains same when it reverses. In C language, the user is allowed to enter any positive integer and to check, whether the given number is palindrome number or not by using the while loop.Example1Following is the C Program to find Palindrome number by using the while loop − Live Demo#include int main(){    int num, temp, rem, rev = 0;    printf("enter a number:");    scanf("%d", &num);    temp = num;    while ( temp > 0){       rem = temp %10;       rev = rev *10+ rem;     ... Read More

Here, the user has to enter the length in centimeters (cm), and then, convert the length into meters (m), and kilometer (km).1 Meter = 100 Centimeters 1 Kilometer = 100000 CentimetersAlgorithmRefer an algorithm given below to convert centimeter into meter and kilometer respectively.Step 1: Declare variables. Step 2: Enter length in cm at runtime. Step 3: Compute meter by using the formula given below.    meter = centim / 100.0; Step 4: Compute kilometer by using the formula given below.    kilometer = centim / 100000.0 Step 5: Print meter. Step 6: Print kilometeExample1Following is the C program to convert ... Read More

In this post, we will understand the difference between float and double data types.floatIt has a single precision.It takes 4 bytes of memory.According to IEEE, it has 32-bit precision.It is used with graphic based libraries.It improves the processing power of programs.It is simple to manage by compilers.Its value can be between 1.2E-38 to 3.4E+38.It can have a precision of up to 6 decimal places.doubleIt has a double precision.It takes 8 bytes of memory.According to IEEE, it has 64-bit precision.Its value can be between 2.3E-308 to 1.7E+308.It can have a precision of up to 15 decimal places.It is considered as the ... Read More

In programming, int and long are the part of primitive data type. The int stores the integer value while long stores the larger range of values like a whole number. In this article, we will see the differences between int and long data types. int (Integer) Data Type The keyword int representing the integer value. It store the both positive and negative values such as -1, 45, -78, 85, etc., but not fractional and decimal values. The value ranges from –2, 147, 483, 648 to 2, 147, 483, 647. Behavior of int in Different Languages Following is the list of ... Read More

In this post, we will understand the difference between ‘new’ and ‘malloc’.newIt is present in C++, Java, and C#.It is an operator that can be used to call the constructor of the object.It can be overloaded.If it fails, an exception is thrown.It doesn’t need the ‘sizeof’ operator.It doesn’t reallocate memory.It can initialize an object when allocating memory for it.The memory allocated by ‘new’ operator can be de-allocated using ‘delete’ operator.It reduces the execution time of the application.Example#include using namespace std; int main(){ int *val = new int(10); cout Read More

In this post, we will understand the difference between the methods ‘dispose’, and ‘finalize’ in C#.DisposeThis method is defined in the IDisposable interface.It has to be invoked by the user.Whenever it is invoked, it helps free the unmanaged resources.It can be implemented whenever a close() method is present.It is declared as public method.It is quick, and instantly disposes an object.Since it performs instantaneously, it doesn’t affect performance.FinalizeIt is a method that is defined in the java.lang.object class.It is invoked by the garbage collector.It helps free the unmanaged resources just before the object is destroyed.It is implemented to manage the unmanaged ... Read More

In this post, we will understand the differences between ‘Extends’ and ‘Implements’ keyword.ExtendsUsing this, a class can be used as a base class, and another class inherits this base class.An interface can also inherit other interfaces using this keyword.Only one superclass can be extended by a class.Any number of interfaces can be extended by an interface.It is not required for the subclass (that extends a superclass) to override all the methods in the superclass.Following is an example of the extends keyword −Exampleclass Super { ..... ..... } class Sub extends Super { ... Read More

A collection framework in Java consists of a set of classes and interfaces which helps in implementing various data structures. List and ArrayList belong to this collection framework. List is an interface and ArrayList is a class. Their main motto is to create a list data structure. List is a collection of ordered elements arranged using the concept of indexing. Arrays use the concept of dynamic array to store elements. What is a List in Java? A list is one of the interfaces of the collection framework. It stores objects in an ordered manner. Here, the elements are stored sequentially. ... Read More