What type of exceptions must be explicitly declared in a throws clause of a method?

Question

Accepted Answer

All exceptions except those of type RuntimeException and Error must be explicitly declared in a method&rsquo;s throws clause.In other words, checked exceptions must be declared, while unchecked exceptions do not require declaration.
Example:

public void readFile() throws IOException {
    // Code that may throw IOException
}

What type of exceptions must be explicitly declared in a throws clause of a method?

Answer with Explanation