![]() Java swing components are platform-independent.ĪWT doesn't support pluggable look and feel. ![]() ![]() There are many differences between java awt and swing that are given below. The javax.swing package provides classes for java swing API such as JButton, JTextField, JTextArea, JRadioButton, JCheckbox, JMenu, JColorChooser etc. Unlike AWT, Java Swing provides platform-independent and lightweight components. It is built on the top of AWT (Abstract Windowing Toolkit) API and entirely written in java. 37 more parts.Java Swing tutorial is a part of Java Foundation Classes (JFC) that is used to create window-based applications. What I mean by this is, working with the same Sudoku board as above, by the end of the problem, we'd want store to look like this:įunction isValidSudoku ( board ) ġ The Happy Number Problem 2 Kadane's Algorithm & The Maximum Subarray Problem. We'll start the problem by creating a hash that'll store the values for each row, column, and square. If not, we can move on to check the next box. Using nested for loops, at each box we'll check the store to see if the box's the current row, current column, and current square already contain that box's value. There's a few ways to deal with this, such as by creating a new set for each row and column, but in my solution I'll be making a hash, which stores unique values as they're seen, and will return false if a non-unique value is found. Since it's a 2D array, you could quickly check one row at a time to see if the values are unique (since each row is its own array), but that would still leave the problem of the columns and squares. What's particularly tricky about this problem is you need a way to keep track of which values you've seen in the row, column, and squares that you're currently in. In this post, I'll be going over one way to approach this problem: by building a hash to store unique values. Whether you've never seen a Sudoku board before, or you love the game as much as I do, this is a fun algorithm because there are many ways to think about how to break up a 9x9 board. By that, we want to be sure that there are no repeats of the numbers 1-9 in each column, row, and 3x3 square. We want to write a function which checks if this board is valid. Where each empty square is represented with a ".". 3 Finding the Only Single Number in an Array 4 Finding the Middle of a Linked List 5 Backspace String Comparisons: Two Ways To Approach a Common Algorithm 6 The Stock Span Problem: Using Stacks To Keep Track Of What's Been Seen 7 Finding the Kth Smallest Element: Walking Through How To Use Depth First Search on a Binary Search Tree 8 The Boyer-Moore Majority Vote Algorithm: Finding the Majority Element in an Array 9 Sorting Characters in a String By Their Frequency 10 Finding the Intersection of Two Arrays 11 Finding the Minimum Path Sum in a Grid with Dynamic Programming 12 Floyd's Tortoise and Hare Algorithm: Finding a Cycle in a Linked List 13 The Sieve of Eratosthenes: Counting the Number of Primes 14 Add Two Numbers Problems: How to Sum Two Linked Lists 15 The Longest Substring With No Repeating Characters 16 Merging Sorted Lists, Two Ways 17 Finding the Longest Common Prefix 18 Reversing a String in Place 19 The ZigZag Conversion Problem 20 The Longest Palindromic Substring: Solving the Problem Using Constant Space 21 Removing an Element in an Array In-Place 22 Solving the Best Time to Buy and Sell Stocks Problem in One Pass 23 Don't Underestimate the Two Pointers: Removing the N-th Node from the End of a Linked List 24 Not an "Easy" Algorithm: Rotating an Array, Three Ways 25 Sudoku Part I: Is the Board Valid? 26 Searching an Array, Two Ways 27 The Climbing Staircase Problem: How to Solve It, and Why the Fibonacci Numbers are Relevant 28 Transposing and Reversing: How to Rotate a 2D Matrix 90 Degrees 29 Turning 38 into 2: How to Solve the Add Digits Problem 30 The Gauss Sum, and Solving for the Missing Number 31 Is this Number the Sum of Two Square Integers? Solving The Sum of Squares Algorithm Two Ways 32 The Word Pattern Algorithm: How to Test if a String Follows a Pattern 33 Finding the Intersection of Two Arrays 34 Top Interview Question: Finding the First Unique Character in a String using Linear Time 35 Solving Pascal's Triangle in JavaScript 36 The Maximum Number of Events Problem 37 Solving Binary Tree Algorithms Using Recursion and Queues 38 From "hello world" to "world hello": Reversing the Words in a String 39 Finding the Most Frequent Elements in an Array 40 Finding the Angle Between the Hands of a Clock 41 The Container with the Most Water: Solving an Algorithm about AreasĮnter fullscreen mode Exit fullscreen mode 1 The Happy Number Problem 2 Kadane's Algorithm & The Maximum Subarray Problem.
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