Скачать или смотреть How to Randomly Swap Items in a 2D Array in Java

Learn how to `randomly swap` player items in a 2D array in Java using an effective approach with an example and detailed explanation.
---
This video is based on the question https://stackoverflow.com/q/64382880/ asked by the user 'Beszteri' ( https://stackoverflow.com/u/12118780/ ) and on the answer https://stackoverflow.com/a/64382938/ provided by the user 'Tim Biegeleisen' ( https://stackoverflow.com/u/1863229/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: 2D Array item swap randomly

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Randomly Swap Items in a 2D Array in Java

In the world of programming, we often encounter challenges related to data structures, and one interesting challenge involves manipulating arrays, specifically 2D arrays. A common scenario is to swap certain elements within this array under specified conditions. In this guide, we’ll explore a practical approach to randomly swap an X or O element with a NOBODY element in a 2D array in Java.

Understanding the Problem

Let's say you have an enumeration called Player that represents three states: X, O, and NOBODY. Your task is to create a method that randomly selects and swaps elements in a 2D array filled with these player items.

The goal is to randomly replace any NOBODY cell with either an X or an O, altering the configuration of your game board. Here’s a quick example of how your initial matrix might look:

[[See Video to Reveal this Text or Code Snippet]]

The desired output after a successful swap could look like this:

[[See Video to Reveal this Text or Code Snippet]]

The Solution Strategy

The strategy to solve this task involves these main steps:

Generate Random Indices: You will generate random indices for both X/O and NOBODY elements within the array bounds.

Perform the Swap: If the chosen indices are valid (i.e., one index is X or O and the other is NOBODY), execute the swap.

Repeat if Necessary: If either condition is not met, repeat the random selection until valid indices are acquired.

Implementing the Solution

Here’s a working implementation in Java. This method will reside within the class that contains your 2D array:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

Random Selection: The Random class is used to generate random indices to pick the elements from.

Percentage Calculation: We utilize integer division and modulus to convert a 1D index into 2D coordinates so that we can easily access elements in the array.

Do-While Loops: The first loop selects an X or O, while the second loop searches for a NOBODY. This ensures that you are swapping valid elements.

Swapping Logic: Finally, the swap is performed between the selected positions.

Conclusion

In this guide, we discussed how to randomly swap elements in a 2D array using Java. By generating random indices and checking conditions with loops, we ensure that our swaps are valid and meet the criteria defined by our game logic. With this method, you can enhance the interactivity of your applications involving game boards, AI simulations, or any scenario requiring dynamic element changes in a grid.

By implementing the solutions discussed here, you can add a robust feature to your Java applications that involve 2D arrays, making them more engaging and versatile.