How can I convert or wrap thrown exceptions to checked exceptions in Java?

Question

How can I convert or wrap thrown exceptions to checked exceptions in Java?

Can Unchecked Exceptions be converted to Checked Exceptions in Java? If so, please suggest ways to convert or move the thrown exception into a checked exception.

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java exception checked-exceptions unchecked-exception

Randhish kumar Dec 14. 14 at 20:08

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2 answers

You can wrap a checked exception with a checked exception

try {
    // do something
} catch (RuntimeException re) {
    throw new CheckedException("Some message", re);
}

+2

Peter lawrey Dec 14. 14 at 20:13

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Eran · Accepted Answer · 2014-12-14T20:09:10+0000

Yes. You can catch an unchecked exception and throw the thrown exception.

Example:

  public void setID (String id)
    throws SomeException
  {
    if (id==null)
      throw new SomeException();

    try {
      setID (Integer.valueOf (id));
    }
    catch (NumberFormatException intEx) { // catch unchecked exception
      throw new SomeException(id, intEx); // throw checked exception
    }
  }

Then, in the constructor of the checked exception, you call initCause

with the passed exception:

  public SomeException (String id, Throwable reason)
  {
    this.id = id;
    initCause (reason);
  }

How can I convert or wrap thrown exceptions to checked exceptions in Java?

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