How Can I Prevent \'Resource leak: \'in\' is never closed\' Warnings in Java?

Java Resource Leak Warning: Prevention with Proper Closing

In programming, resource management is crucial for ensuring the efficient use and proper release of system resources. Failing to handle resources correctly can lead to resource leaks, which negatively impact performance. In Eclipse, you may encounter the warning "Resource leak: 'in' is never closed" when working with streams.

Consider the following code snippet:

public void readShapeData() {
    Scanner in = new Scanner(System.in);
    System.out.println("Enter the width of the Rectangle: ");
    width = in.nextDouble();
    System.out.println("Enter the height of the Rectangle: ");
    height = in.nextDouble();
}

When executing this code, Eclipse prompts you with the warning because you never close the Scanner object after using it. To prevent resource leaks and ensure proper resource management, you must close the Scanner explicitly after reading the necessary data.

The recommended solution is to add the following line of code to the end of your method:

in.close();

By calling close(), you release system resources associated with the Scanner object, preventing resource leaks and potential performance issues.

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