Server Side Programming Articles - Page 1578 of 2646

PermGen is the memory area for storing class data like static variable, byte code and etc. By default 64 Mb is allocated for PermGen. It can be tuned by using -XXMaxPermSize.In Java 8, PermGen method area replaced with MetaSpace. They have moved permGem to the separate memory in the native OS and that is called MetaSpace. It can by default auto increases its size. In MetaSpace, classes can load and unload during the lifespan of the JVM.Sr. No.KeyPermGenMetaSpace1BasicPermGen is the memory area for storing class data like static variable, byte code and etcIn Java 8, PermGen method area replaced with ... Read More

In this tutorial, we will be discussing a program to find Cullen Number.For this we will be provided with an integer. Our task is to find the cullen number at that position using the formula −2n* n + 1Example Live Demo#include using namespace std; //finding the nth cullen number unsigned get_cullen(unsigned n){    return (1

Iterator and split iterator both interface are used for iterating over the collection.Split iterator is introduced in Java 8 for achieving parallelism. It can split the given set of element and can perform operation parallely using different independent threads. It can traverse the elements parallely as well as sequentially manner. There are following important methods in the splitIterator interface −trySplit - It is used for split the given set of elements into multiple pieces.tryAdvance - It is equivalent to the hasNext/ next methods available in Iterator interfacegetExactSizeIfKnown  -It is used to get the size of the given set of elements.Sr. ... Read More

In this tutorial, we will be discussing a program to find covariance.For this we will be provided with two sets of random variables. Our task is to calculate their covariance i.e, the measure of how much those two values differ together.Example Live Demo#include using namespace std; //function to find mean float mean(float arr[], int n){    float sum = 0;    for(int i = 0; i < n; i++)    sum = sum + arr[i];    return sum / n; } //finding covariance float covariance(float arr1[], float arr2[], int n){    float sum = 0;    for(int i = 0; i ... Read More

In this tutorial, we will be discussing a program to find the count of numbers having odd number of divisors in a given range.For this we will be provided with the upper and lower limits of the range. Our task is to calculate and count the number of values having an odd number of divisors.Example Live Demo#include using namespace std; //counting the number of values //with odd number of divisors int OddDivCount(int a, int b){    int res = 0;    for (int i = a; i

Stream is introduced in Java 8, it is only used for processing group of data not for the storting elements.. It does not modify the actual collection, they only provide the result as per the pipelined methods.Stream api supports multiple operations and operations are divided into two parts −Intermediate Operation- These operations are used to pipeline other methods and to transform into the other streams. They don’t produce results because these operation does not invoke until the terminal operation gets executed. Below are the examples −sorted(Comparator)peek(Consumer)distinct()Terminal operations - These operations are used to produce results. They can’t be used for ... Read More

In this tutorial, we will be discussing a program to find correlation coefficient.For this we will be provided with two arrays. Our task is to find the correlation coefficient denoting the strength of the relation between the given values.Example Live Demo#include using namespace std; //function returning correlation coefficient float find_coefficient(int X[], int Y[], int n){    int sum_X = 0, sum_Y = 0, sum_XY = 0;    int squareSum_X = 0, squareSum_Y = 0;    for (int i = 0; i < n; i++){       sum_X = sum_X + X[i];       sum_Y = sum_Y + Y[i];   ... Read More

In this tutorial, we will be discussing a program to find compound interest.Compound interest is the interest by adding the current interest to the principal sum and then calculating the interest on the updated amount.Example Live Demo#include using namespace std; int main(){    double principle = 10000, rate = 10.25, time = 5;    //calculating compound interest    double CI = principle * (pow((1 + rate / 100), time));    cout

Executor framework are designed using thread pool concept. Thread pool is the way to reuse the already created thread instead of creating a new thread every time to execute the current task.Executors class provides a factory method to create thread pools. The ThreadPoolExecutor class is the base implementation for the executors that are returned from many of the Executors  factory methods.Sr. No.KeyFixed Thread PoolCached Thread Pool1BasicAs per Java Doc −Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue. At any point, at most nThreads threads will be active processing tasks. If additional ... Read More

Executor and ExecutorServices both interfaces are part of the Executor framework. It is released with Java 5. In java, thread creation is very expensive operation so we should  reuse the available thread instead of starting a new thread every time and we can achieve the same using Executor framework.Executor framework use the thread pool to execute the task parallel which helps to optimize response time and resource utilization. It provides four types of built in thread pools −Fixed Thread PoolCached Thread PoolScheduled Thread PoolSingle Thread ExecutorSr. No.KeyExecutorExecutorServices1BasicIt is a parent interfaceIt extends Executor Interface2MethodIt has execute() methodIt has submit() method3Return TypeIt ... Read More