Скачать или смотреть How to Fix Your JAVA Stack Display Issue

Learn how to resolve the "Stack underflow" issue in your JAVA stack program by understanding how to implement the `push` and `display` methods correctly.
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This video is based on the question https://stackoverflow.com/q/63699444/ asked by the user 'eliptt' ( https://stackoverflow.com/u/14206622/ ) and on the answer https://stackoverflow.com/a/63699540/ provided by the user 'kozmo' ( https://stackoverflow.com/u/8030651/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving Display Issues in Your JAVA Stack Program

Creating a stack in JAVA can be quite straightforward, but sometimes, even small errors can lead to frustrating issues like elements not displaying correctly. If you’ve encountered a “Stack underflow” message when trying to display elements from your stack, you’re not alone! This post will guide you through the common pitfalls and provide a solution to fix your stack implementation.

Understanding the Problem

In your stack implementation, you faced an issue with the display method, where you received a “Stack underflow” message. This indicates that the stack is empty when you attempted to display its contents. Let’s break down the code and identify the mistakes.

Key Areas to Focus On:

Push Method: This method is responsible for adding elements to the stack.

Display Method: This method should traverse the stack and print all its elements.

Fixing the Push Method

The original push method implementation incorrectly checks for an empty stack. You need to ensure that you’re checking whether the stack is full before allowing a new element to be added. Here’s the corrected version:

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

Changes Made:

Method Condition: We now check if the stack is not full (!isfull()) before pushing a new element.

Fixing the Display Method

The original display method was also incorrect, as it only iterated from 0 to top - 1, excluding the element at the top index. Here’s how to fix it:

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

Changes Made:

Iteration Condition: The loop now runs from 0 to top (inclusive), which ensures all elements are printed.

Putting It All Together

With these corrections, the complete Stack class should look like this:

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

Testing the Solution

Here’s how you can test your Stack class with the Stackex class:

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

Conclusion

By making the above-mentioned adjustments to your push and display methods, you should be able to avoid the “Stack underflow” message and display all elements correctly. This small change ensures your stack will operate as expected. Enjoy coding with JAVA!