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Articles by karthikeya Boyini
Page 83 of 143
Java program to add and remove elements from a set which maintains the insertion order
In this article, we will learn how to use a LinkedHashSet in Java to add and remove elements while maintaining the insertion order. You will see how elements are stored, removed, and updated in a LinkedHashSet without altering the sequence in which they were added. Problem Statement Write a Java program to add elements to a LinkedHashSet, remove specific elements, and display the updated set while ensuring the insertion order of the elements remains unchanged. Below is a demonstration of the same − Input Set = [20, 60, 80, 120, 150, 200, 220, 260, 380] Output Set = [20, 60, ...
Read MoreJava program to get the current value of the system timer in nanoseconds
In this article, we use the System.nanoTime() method in Java to get the current value of the system timer in nanoseconds. It returns the current value of the most precise available system timer, in nanoseconds. Problem StatementGiven that you need to get the current value of the system timer in nanoseconds, write a Java program that retrieves this value using the System.nanoTime() method.Input There is no specific input as the program retrieves the system's current time in nanoseconds directly.Output Current Value: 49908709882168 nanoseconds Steps to get the current value of the system timer in nanosecondsThe following are the ...
Read MoreJava program to generate a random number from an array
In this article, we will learn how to generate a random number from an array of integers in Java by using Random class. The Random class provides methods to generate random numbers, and we will use the nextInt(int bound) method to get a random index within the bounds of our array length. Problem Statement Given an array of integers, we need to randomly select and display one element from the array using Java. Input arr = { 10, 30, 45, 60, 78, 99, 120, 140, 180, 200}; Output Random number from the array = 30 Steps to generate ...
Read MoreJava program to put value to a Properties list
In this article, we will learn how to use the Properties class in Java to store and display key-value pairs. The Properties class is useful for handling configuration settings or storing data in a structured way, where both keys and values are strings. By using the put() method, we can easily add values to a property list and later retrieve or display these key-value pairs. This approach provides a simple and efficient way to manage data in a key-value format in Java applications. Problem Statement A properties list contains country-year pairs. Write a Java program to store values ...
Read MoreJava program to merge duplicates of a List with TreeSet
In this article, we will learn to merge duplicate elements from a List in Java by using a TreeSet. This program will take a List of strings containing duplicate values, transfer the elements into a TreeSet, and display the unique, sorted elements. Using a TreeSet is ideal here because it automatically removes duplicates and orders the elements in natural order. Problem Statement Write a Java program to remove duplicate elements from a list using a TreeSet. The program should take a list with repeated elements, convert it into a TreeSet to eliminate duplicates, and display the unique, sorted elements. Input ...
Read MoreJava program to sort a List in case sensitive order
In this article, we will learn to sort a List in case-sensitive order in Java. Sorting in case-sensitive order places uppercase letters before lowercase letters (e.g., 'A' before 'a'), meaning that uppercase letters are prioritized in sorting. This program uses Java’s built-in Collections.sort method to arrange elements in this specific order. Problem Statement Given a list of mixed uppercase and lowercase letters, write a Java program that sorts the list in a case-sensitive order. Input { "P", "W", "g", "K", "H", "t", "E" } Output List = [P, W, g, K, H, t, E] Case Sensitive Sort = [E, H, ...
Read MoreJava program to find the LCM of two numbers
In this article, we will learn to find the LCM of two numbers using Java. L.C.M. or Least Common Multiple of two values is the smallest positive value which is the multiple of both values. For example, multiples of 3 and 4 are: 3 → 3, 6, 9, 12, 15 ... 4 → 4, 8, 12, 16, 20 ... The smallest multiple of both is 12, hence the LCM of 3 and 4 is 12.We will learn through two different methods to solve this: an incremental method and a formula-based approach using the Greatest Common Divisor (GCD). Problem Statement Write ...
Read MoreJava program to add long integers and check for overflow
In this article, we will add two long integers in Java and check if the sum causes an overflow, which happens when the result exceeds the maximum value that a long data type can hold, defined by the Long class as Long.MAX_VALUE. If the sum goes beyond this limit, an exception will be thrown to handle the overflow. Otherwise, the sum will be displayed as the result. Steps to add long integers and check for overflow Following are the steps to add long integers and check for overflow − First, we will define two long integers ...
Read MoreJava program to check if the string contains any character in the given set of characters
In this article, we will learn to check if the string contains any character in the given set of characters in Java. We will iterate over the string and compare each character to a set of characters that we want to search for. If any match is found, the program will print the character and confirm that it is present in the string. Problem Statement Write a program in Java to check if the string contains any character in the given set of characters − Input str = abcde chSearch = 'b', 'c' Output Character b found in string abcde ...
Read MoreJava program to remove the leading and trailing quotes from a string
In Java, handling strings with quotes can be managed by checking and manipulating the string’s start and end. This example demonstrates how to remove double quotes from both the beginning and end of a string. Problem Statement Given a string enclosed in double quotes, write a Java program to remove these enclosing quotes. The result must be the original string without the enclosing double quotes. Input String with double quotes= "Demo Text" Output String after removing double quotes = Demo Text Steps to remove the leading and trailing quotes from a string Below are the steps to remove the leading ...
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