Problem Statement: Implement a method to find duplicate elements in an ArrayList in Java. Here’s a Java program that demonstrates how to implement a method to find duplicate elements in an ArrayList. I’ll provide a step-by-step explanation of the logic used in the program. OUTPUT: Original List: [1, 2, 3, 2, 4, 1]Duplicate Numbers: [1, …
Problem Statement: Implement a Java program to reverse a List without using the built-in Collections.reverse() method. Here’s a Java program that reverses a list without using the built-in Collections.reverse() method. I’ll provide a step-by-step explanation of the logic used in the program. OUTPUT: Original List: [1, 2, 3, 4, 5]Reversed List: [5, 4, 3, 2, …
Problem Statement: Write a Java program to create an ArrayList of integers, add elements, remove elements, and find the size of the list. Here’s a Java program that demonstrates how to create an ArrayList of integers, add elements to it, remove elements from it, and find the size of the list. I’ll provide a thorough …
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In this post, you will learn how to find the first non-repeating character in a given String using Java. To find the first non-repeating character in a given string, you can follow these steps: Java Program to Find the First Non-repeating Character Here’s a Java program that implements the above approach: OUTPUT: First non-repeating character: …
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In this post, you will learn how to write a program to find all possible combinations of String in Java. In the context of computer science and programming, “string combinations” refer to the various ways in which you can arrange or select characters from a given string. A combination is a selection of items from …
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In this post, you will learn the String permutations program in Java. Generating permutations of a string involves finding all possible arrangements of its characters. Here’s a Java program to generate and print all permutations of a given string along with an explanation of the code: OUTPUT: Permutations of ‘ABC’:ABCACBBACBCACBACAB Explanation: See also: Maximum Occurring …
Creating a secret message program in Java can be an interesting project. In this article, you will learn a simple example of a secret message program that encrypts and decrypts a message using a simple Caesar cipher. Caesar cipher: The Caesar cipher is one of the simplest and earliest encryption techniques used to secure messages. …
This article shows you about Generating Random Numbers in Java. Java provides multiple ways to generate random numbers using some pre-defined methods and classes. In this article, we will learn the following ways: Generating Random Numbers using Random class In Java, you can generate random numbers using the Random class from the java.util package. The …
In this post, you will learn how to write a program for Number Guessing Game in Java. The Number Guessing Game in Java is a simple text-based game where the computer randomly selects a secret number within a specified range, and the player’s objective is to guess the number correctly. The game provides feedback to …
In this article, you will learn how to write the Hangman Game in Java. Hangman is a word-guessing game that involves two participants: the word-setter and the guesser. The game is usually played on paper, but it can also be implemented as a computer program or mobile app. The objective of the guesser is to …