Try catch trouble

hi all, im quite new to java and am having a bit of trouble with a try catch statement
try
          System.out.println("Enter your level: ");
          level = data.nextInt();
          while (!VLevel(level))
     System.out.println("Enter your level: ", LEVEL);
               dstfloor = read_in.nextInt();
          catch(InputMismatchException exception)
System.err.println("Invalid level");
continue;
the problem i have is that when it triggers the exception, it just repeats the 'invalid level' line infinitely. any ideas?
thanks

If this line is causing an exception: dstfloor = read_in.nextInt();Then dstfloor's value will not change.
Because you are using continue in the catch, the loop will run unfinately with dstfloor having the same value.
You will need to modify the dstfloor var either in the catch or in the finally.
Edited by: Azzer_Mac on Apr 24, 2008 9:08 AM

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  • Try/catch and 'cannot resolve symbol'

    I am relatively new to java programming and something has me puzzled...
    Why do I get a 'cannot resolve symbol' message when I include a variable definition in a try/catch section. When I put it/them before the 'try' statement it compiles as expected. How are statements inside a try compiled differently than those outside?
    try {
        StringBuffer pageBuffer = new StringBuffer();
        String inputLine;
        BufferedReader in = new BufferedReader(
           new InputStreamReader( theURL.openStream() ) );
        while ((inputLine = in.readLine()) != null) {
             System.out.println(inputLine);
            pageBuffer.append(inputLine);
        in.close();
    } catch (Exception ignored) {}C:\Projects\WebExplorer\PageVisitor.java:142: cannot resolve symbol
    symbol : variable pageBuffer
    location: class PageVisitor
         return pageBuffer.toString();
    Paul

    A try block is just like any other block delimited by {...} in that all variables declared inside it are local to that block. I.e. they are not visible or usable anywhere outside it. Your pageBuffer variable, for example, is a local variable that can only be used inside the try-block in which it is declared.
    Your obvious solution, knowing that, is to declare the variables outside the try and catch blocks. Remember to initialize them (even to null), otherwise the compiler will complain about variables that may not have been initialized.

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