Variables cannot be resolved

Question

I am making my first Java program (In hopes to master it in the next century) and have ran into some issues. When I try to create a string with a combination of text and previou

Answer 1

In Java you can only use a variable in the block in which it's defined.

You declare the variables data and input inside your try block.

This means you can only use them inside that block.

If you want to use data and input in step 2, you should declare them before your try block.

---

To fix it, do something like this:

public class Application {

    public static main(String[] args) {

        String data = null;
        String commandOutput = "";
        BufferedReader input = null;

        try {
            // do stuff
            data = text;
            input = // initialize buffered reader
            String line = input.readLine();
            while (line != null) {
                commandOutput += line;
                line = input.readLine();
            }
        }
        catch (SomeSpecificException ex) {
            // please handle exceptions!
        }
        catch (IOException ioex) {
            // handle IO Exceptions here
        }
        finally {               
            try {
                input.close();
            }
            catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        .
        .
        .
        String emailBody = "blah blah " + data + " blah blah " + commandOutput;
    }
}