How Can I Prevent Resource Leaks When Using a Scanner in Java?

Resource Leak: Closing Scanner Input

Eclipse issues the warning "Resource leak: 'in' is never closed" because the Scanner object, 'in', opened in the provided code is left unclosed. This can lead to resource leaks, consuming system resources unnecessarily.

The code segment in question reads input from standard input using a Scanner:

Scanner in = new Scanner(System.in);

To resolve this issue, the Scanner object must be closed after use to release the system resources it occupies. This can be done using the close() method:

in.close();

Here's the modified code with the corrected resource cleanup:

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();

    in.close();  // Close the Scanner to prevent resource leaks
}

By closing the Scanner, you ensure that any associated system resources are released, preventing resource leaks and potential system performance issues.

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