What ways can prevent optional handling of IOException in code?

To avoid mandatory handling of the IOException in Java, you can use several approaches:

1. Handling the exception within the method — use a try-catch block to catch the IOException and handle it locally.

try {
    // code that may throw IOException
} catch (IOException e) {
    // handle the exception
}

2. Wrapping IOException in an unchecked exception — create a RuntimeException so you don't have to declare throws.

try {
    // code
} catch (IOException e) {
    throw new RuntimeException(e);
}

3. Using libraries or methods that do not throw checked exceptions — for example, some utilities may handle IOException internally.

Thus, if you do not want to declare throws IOException in the method signature, you need to catch and handle the exception inside the method.