Here’s a Java program to find the Fibonacci series up to a given number: import java.util.Scanner; public class FibonacciSeries { public static void main(String[] args) { int n, t1 = 0, t2 = 1; Scanner scanner = new Scanner(System.in); System.out.print(“Enter the number of terms: “); n = scanner.nextInt(); System.out.print(“Fibonacci Series: “); for (int i = … Read more
The Optional class is a feature introduced in Java 8 that provides a way to handle null values more effectively. It is a container object that may or may not contain a non-null value. The purpose of Optional is to provide a simple way to write code that works correctly even if a variable may … Read more
One of the major changes introduced in Java 8 was the ability to define default and static methods in interfaces. Prior to Java 8, interfaces could only contain abstract method declarations, which meant that any implementation had to be provided by a class that implemented the interface. With the introduction of default and static methods, … Read more
Sure, here’s a Java program to find the length of the longest increasing subarray in an array: public class LongestIncreasingSubarray { public static void main(String[] args) { int[] array = {1, 2, 3, 2, 3, 4, 5, 6, 7}; int length = findLongestIncreasingSubarrayLength(array); System.out.println(“Length of longest increasing subarray: ” + length); } public static int … Read more
Sure, here’s a Java program to find the common elements between two arrays: import java.util.Arrays; public class CommonElements { public static void main(String[] args) { int[] array1 = {1, 2, 3, 4, 5}; int[] array2 = {3, 4, 5, 6, 7}; int[] common = findCommonElements(array1, array2); System.out.println(“Common elements: ” + Arrays.toString(common)); } public static int[] … Read more
Sure, here’s a Java program to check if a string is a palindrome or not: import java.util.Scanner; public class PalindromeCheck { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print(“Enter a string: “); String input = scanner.nextLine(); boolean isPalindrome = checkPalindrome(input); if (isPalindrome) { System.out.println(“The string is a palindrome.”); } else { … Read more
Sure, here’s a Java program to reverse a string without using any built-in methods: import java.util.Scanner; public class ReverseString { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print(“Enter a string: “); String input = scanner.nextLine(); String reversed = reverse(input); System.out.println(“Reversed string: ” + reversed); } public static String reverse(String str) { … Read more
Method references is a feature introduced in Java 8 that provides a shorthand syntax for referring to a method as a lambda expression. Method references allow us to pass a method as a parameter to a functional interface, instead of having to write a lambda expression that calls the method. Here are some basics of … Read more
The Stream API is a feature introduced in Java 8 to provide a functional programming approach for processing collections of data. The Stream API allows us to perform various operations on a collection of data, such as filtering, mapping, and reducing, in a concise and efficient manner. Here are some basics of the Stream API … Read more
In Java, file and directory operations are used to manage files and directories on the file system. Java provides several classes and methods for file and directory operations, including the `File` class and its related methods. Here are some basics of file and directory operations in Java: 1. Creating a file: To create a new … Read more