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Скачать или смотреть Understanding Why Main Method Can't Access Public Method in the Same Package

  • vlogize
  • 2025-09-29
  • 0
Understanding Why Main Method Can't Access Public Method in the Same Package
Why Main method dosent see public method from the same package?oopprogram entry point
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Описание к видео Understanding Why Main Method Can't Access Public Method in the Same Package

Discover why the `Main` method does not see public methods in the same package and learn how to resolve it effectively.
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This video is based on the question https://stackoverflow.com/q/63729146/ asked by the user 'IMBABOT' ( https://stackoverflow.com/u/14216734/ ) and on the answer https://stackoverflow.com/a/63729439/ provided by the user 'IMBABOT' ( https://stackoverflow.com/u/14216734/ ) 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: Why Main method dosent see public method from the same package?

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.
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Understanding Why Main Method Can't Access Public Method in the Same Package

When you're working with Java, you might find yourself puzzled by the behavior of methods across different classes, especially when they are located in the same package. One such common question arises: Why does the Main method not see the public method from the same package? Let’s break it down and find the answer step by step.

The Code Structure

To set the stage, let's look at the provided code snippets to understand their context better.

The Main Class

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

The Class C

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

In this example, class C has a public static method1(), but when called from the Main class's main() method, it appears that method1() is not accessible. Let's dive into the reasons behind this.

The Core Issue: Static Methods

The confusion arises primarily from the nature of static methods in Java. Here’s a simplified breakdown:

Definition of Static: A static method belongs to the class rather than any specific instance of that class. This means you can call it without creating an object of that class.

Why method1() Can't Be Accessed

Instance Requirement: When you create an instance of class C (i.e., C c = new C();), you're accessing the object and not the class level methods directly. However, in your case, you seem to be trying to call a static method via an object instance, which is not the correct approach in Java for methods marked as static.

Static Method Call: Since method1() is static, the correct way to call it would be using the class name itself rather than through an instance of the class. For instance, you should call it as follows:

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

Recommended Solution

To resolve the issue of not accessing the public static method1() in class C, do the following:

Call the static method using the class name directly instead of through an instance.

Here’s how you would adjust the main method:

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

Conclusion

In summary, understanding the visibility and accessibility of methods based on whether they are static or instance methods is crucial in Java programming. By always associating static methods with their respective class, you can avoid common pitfalls like the one discussed here.

In Java, when you find that one method can't access another seemingly accessible method, always check if it's a static method and ensure you're using the proper syntax to call it. With this clarity, your code will be both more effective and easier to debug.

Key Takeaways

Static methods should be called using the class name.

Instance methods require an object of the class to be called.

Now that you've got the answer to why the Main method doesn't see public methods in the same package, you can apply this knowledge to make your Java programming more robust!

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