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Thread: interface - public void method() throws SomeException;

  1. #1
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    Default interface - public void method() throws SomeException;

    I need to write the implementation for the following interface. I noticed that "throws SomeException" are marked in the method declaration header. Does it mean I must specify the particular precondition and construct that particular exception object for a throw statement in the method?

    public interface MinHeap<E> {

    public void insert(E item) throws HeapOverflowException;
    public E findMin() throws NoSuchElementException;
    public E deleteMin() throws NoSuchElementException;
    }


  2. #2
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    Default public void method() throws SomeException;

    I need to write the implementation for the following interface. I noticed that "throws SomeException" are marked in the method declaration header. Does it mean I must specify the particular precondition and construct that particular exception object for a throw statement in the method?

    public interface MinHeap<E>
    {
    public void insert(E item) throws HeapOverflowException;
    public E findMin() throws NoSuchElementException;
    public E deleteMin() throws NoSuchElementException;
    }

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    Member angstrem's Avatar
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    Default Re: public void method() throws SomeException;

    "throws" means just a possibility. It can happen, and it can never happen. By the way, when I want to test something quickly, I often do it in the main method with following signature:
    public static void main(String[] args) throws Exception
    And it works even if the body does not throw any exception.

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    JavaOwl (June 6th, 2013)

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    Super Moderator jps's Avatar
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    Default Re: interface - public void method() throws SomeException;

    Please do not double post your questions

    Threads merged

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    JavaOwl (June 6th, 2013)

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    Default Re: public void method() throws SomeException;

    I still need to include the codes in the body to handle the exception either
    if (precondition) { throw new SomeException();}
    or
    try/catch block
    right?

    if that's the case, why do I need to put "throws Exception" in the method header?

    --- Update ---

    got it. thanks.

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