All Easy Articles

Disarium Number

Given a number “n”, find if it is Disarium or not. A number is called Disarium if sum of its digits powered with their respective… Read More

series

DSA

Mathematical

Check if a number can be expressed as a sum of consecutive numbers

Given a number n, the task is to check whether it can be expressed as a sum of two or more consecutive numbers or not. Example… Read More

Bit Magic

DSA

Mathematical

throw and throws in Java

In Java, Exception Handling is one of the effective means to handle runtime errors so that the regular flow of the application can be preserved.… Read More

Java

Check if a string can become empty by recursively deleting a given sub-string

Given a string “str” and another string “sub_str”. We are allowed to delete “sub_str” from “str” any number of times. It is also given that… Read More

STL

DSA

Strings

Check equal frequency of distinct characters in string with 1 or 0 removals

Given a string S having lowercase alphabets, the task is to check if all distinct characters in S occurs same number of times by removing… Read More

DSA

Strings

Output of Java Program | Set 7

Difficulty level : Intermediate Predict the output of following Java Programs. Program 1 : public class Calculator { int num = 100; public void calc(int… Read More

Java

TreeSet in Java

TreeSet is one of the most important implementations of the SortedSet interface in Java that uses a Tree for storage. The ordering of the elements… Read More

Java - util package

Java-Collections

java-treeset

Java

Nearest prime less than given number n

You are given a number n ( 3 <= n < 10^6 ) and you have to find nearest prime less than n? Examples: Input… Read More

DSA

Mathematical

Output of Java Program | Set 6

Difficulty level : Intermediate Predict the output of following Java Programs. Program 1: class First { public First() { System.out.println("a"); } } class Second extends… Read More

Java

Smallest number divisible by first n numbers

Given a number n find the smallest number evenly divisible by each number 1 to n.Examples: Input : n = 4 Output : 12 Explanation… Read More

DSA

Mathematical

Even Fibonacci Numbers Sum

Given a limit, find the sum of all the even-valued terms in the Fibonacci sequence below given limit.The first few terms of Fibonacci Numbers are,… Read More

Fibonacci

DSA

Mathematical

Arrays.toString() in Java with Examples

Today we are going to discuss the simplest way to print the array as a string in Java: Arrays.toString() method. How to use Arrays.toString() method? … Read More

Misc

Nth Even Fibonacci Number

Given a value n, find the n’th even Fibonacci Number.Examples : Input : n = 3 Output : 34 Input : n = 4 Output… Read More

DSA

Mathematical

Queries in a Matrix

Given a matrix M of size m x n ( 1 <= m,n <= 1000 ). It is initially filled with integers from 1 to… Read More

DSA

Mathematical

Matrix

Collections.reverseOrder() in Java with Examples

The reverseOrder() method of Collections class that in itself is present inside java.util package returns a comparator and using this comparator we can order the… Read More

Java - util package

Java-Collections

Java-Collections-Class

Java-Functions

Java

Collections.shuffle() Method in Java with Examples

shuffle() method of Collections class as the class name suggests is present in utility package known as java.util that shuffles the elements in the list.… Read More

Java-Collections

Java-Collections-Class

Java-Functions

Java

ArrayList to Array Conversion in Java : toArray() Methods

Following methods can be used for converting ArrayList to Array: Method 1: Using Object[] toArray() method Syntax: public Object[] toArray() It is specified by toArray… Read More

Java - util package

Java-ArrayList

Java-Arrays

Java-Collections

Java-Functions

Java

Java | Java Packages | Question 3

Predict the output of following Java program // Note static keyword after import. import static java.lang.System.*; class StaticImportDemo { public static void main(String args[]) { … Read More

Java-Java Packages

Java-Packages

Java Quiz

Collections.sort() in Java with Examples

java.util.Collections.sort() method is present in java.util.Collections class. It is used to sort the elements present in the specified list of Collection in ascending order.… Read More

Java

NavigableMap Interface in Java with Example

The NavigableMap interface is a member of the Java Collection Framework. It belongs to java.util package and It is an extension of SortedMap which provides… Read More

Java-Collections

Java