Abt try

Question

hi
i have a small doubt abt try.
A try block should have either a catch block or a finally block, but it's not required to have both.
whts the use of ahving try block with out having catch..
thnx in advance
mysha

Answer 1

You use try/finally without catch when you're not going to handle any exceptions, but you are going to clean up, regardless of how the try block completes.
void foo() throws IOException, MyProcessingException {
    open a file
    try {
        for each line // reading a line can throw IOE
            process it // processing a line can trhow MyProcessingException
    finally {
        close the file
} Regardless of whether there's an exception reading the file or processing it, or the try block completes cleanly, finally ensures the file gets closed.