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In Java, a LinkedHashMap is a popular data structure that combines the advantages of a doubly linked list with a hash map. The elements are retrieved in the same order as they were added since it preserves the sequence of insertion. When we need to iterate over the key-value pairs in a specified sequence, LinkedHashMaps are especially helpful. There are several methods accessible in situations where we want to print every mapping contained in a LinkedHashMap. In this article, we will examine two different methods for efficiently printing all LinkedHashMap's mappings in Java, each having its own benefits and sample ... Read More
When dealing with Java terminal apps, individuals may frequently want to print colored text to improve the output's aesthetic appeal and readability. ANSI escape codes can be used to generate colored text instead of the monochrome output that Java's default terminal generally produces. When printed to the console, ANSI escape codes are unique sets of characters that alter the text's appearance by altering its color, style, or background. In this article, we'll look at how to print colored text in the Java console using ANSI escape codes. We'll go over two examples, one with colored text only and the other ... Read More
The task of printing an array's elements in Java is one that programmers come upon regularly. Having a simple and effective technique for printing arrays is crucial, whether you want to display the array contents for debugging purposes, present them to the user in a prepared manner, or analyze the data within the array. While utilizing a loop is the most common and conventional strategy, there may be times when you need to look into other options to do the same objective. To provide you with a new viewpoint on how to handle array printing chores, this article seeks to ... Read More
Java's LinkedHashMap data structure combines the strengths of a HashMap as well as of a doubly-linked list. It is one of the better options for situations requiring predictable iteration as it not only offers key-value mapping like a HashMap but also preserves the insertion order of components. There are times when we need to print every key found in a LinkedHashMap for multiple reasons, that include debugging, analysis and information display to users. In this post, we will examine two excellent techniques that let us print every key from a LinkedHashMap in Java, enabling us to effectively extract and visualize ... Read More
Widely used Java ArrayLists are data structures that offer dynamic arrays, enabling simple element manipulation. It is sometimes necessary to stop duplicate elements from being added to an ArrayList, though. Duplicate parts can cause your programme to behave unexpectedly, produce erroneous results, and use wasteful algorithms. This article will examine two methods to avoid adding duplicate components to a Java ArrayList, arming you with the information and resources you need to maintain data integrity and write cleaner code. Multiple disadvantages may result from adding duplicate elements to an array list. First, it might result in redundant data, which would use ... Read More
In this problem, we need to construct the original string from the given string. The given string is formed from the original string using the given rules. Here, we can use the given encryption rule and encrypted string to find the decrypted string by applying the encryption rule in reverse order. Problem statement – We have given a binary string bin_str of length N and positive integer k. The binary string is constructed from the ‘enc’ string by following the below operations and using the x value. If enci-k is equal to 1, bin_stri is equal to 1. If ... Read More
In this problem, we will find the length of the longest subsequence of the given string such that it has the same left and right rotation. We can solve the problem by finding all subsequences of the given string and checking whether particular subsequences have the same left and right rotation. The other approach uses the observation that string can have only the same left and right rotation if it contains a single character or alternate character and the left is even. Problem statement – We have given an alpha string containing only numeric digits. We need to find ... Read More
In this problem, we will find a minimum number of string characters needed to be replaced to make all characters. In the first approach, we will find the minimum count of the replaceable characters by counting the frequency of each character in the given string. In another approach, we will determine the cost to convert all string characters to a particular character and take the minimum value from that. Problem statement – We have given a string alpha containing N alphabetical characters. We need to find the minimum number of characters to replace to make all string characters equal. Sample ... Read More
In this problem, we need to construct one string by slicing the other string. We can use the longest common substring to solve the problem. We can find the longest common substring between both strings, slice str1 into 1 or 2 parts, and remove the substring from str2. Again, we find the longest common substring in updated strings and follow it until str2 becomes empty. In this way, we can solve the problem. Problem statement – We have given str1 and str2 strings of different lengths. We need to construct the string str2 by slicing and concatenating the parts of ... Read More
In this problem, we will find the lexicographically smallest string by concatenating the given string’s prefix and its reverse. We can find the lexicographically smallest prefix of the string and get the required string. Problem statement – We have given a string alpha containing the alphabetical characters. We need to construct the lexicographically smallest string, which we can get by concatenating any string prefix with its reverse. Sample examples Input alpha = "welcome"; Output 'wewe’ Explanation – The lexicographically smallest prefix is ‘we’. So, we have concatenated it with its mirror. Input alpha = "tutorialspoint" ... Read More