What's the necessity of the finally clause?

What's the difference between
*try{*
process1();
*catch(Exception e){*
process2();
*finally{*
process3();
And
*try{*
process1();
*catch(Exception e){*
process2();
process3();
?

"The finally block always executes when the try block exits. This ensures that the finally block is executed even if an unexpected exception occurs."
http://java.sun.com/docs/books/tutorial/essential/exceptions/

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