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Tip of the Day
Language: Java
Expertise: Beginner
Jul 2, 2001

Avoiding Unnecessary Catch Blocks


The result of adding unnecessary catch blocks is code like this, where exceptions are caught and then immediately re-thrown:
 
    try
    {
        // some code here
    }
    catch (Exception e)
    {
        throw e;
    }
    finally
    {
        // Cleanup code here
    }

There seems to be a prevalent notion that a try block must be followed by a corresponding catch block. This is not true. Java does not mandate a catch block to always follow a try block. You can actually shorten the above code by eliminating the unnecessary catch block as shown:
 
    try
    {
        // some code here
    }
    finally
    {
        // Cleanup code here
    }
Navneet Gupta
 
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