Saving using java.io.*;

Question

When the user hits the saved button on my application, they should be able to save the file. I am using code which works fine in other programs but not in this one. here it is:
private void SaveJButtonActionPerformed( ActionEvent event )
     String fileName=new String("");
     fileName=JOptionPane.showInputDialog("SAVE AS?");
     final FileWriter outputFile = new FileWriter(fileName);
     final BufferedWriter outputBuffer = new BufferedWriter(outputFile);
     final PrintWriter printstream = new PrintWriter(outputBuffer);
     Album[] printList = myList.getList();
     for (int i=0; i<6; i++)
     printstream.println(printList.printDate());
     printstream.close();
}I am getting the error "unreported exception java.io.IOException; must be caught or declared to be thrown"
That error is related to the line final FileWriter outputFile = new FileWriter(fileName);
Is it because i am using the filewriter in an Action Event Method rather than a main?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

String fileName=new String("");You should create String objects in this manner:
String fileName = "";Your compiler tells you "unreported exception java.io.IOException; must be caught or declared to be thrown" because you do not have a catch clause when attempting to use a constructor that may throw it.
What happens if an error occurs while creating outputFile with the fileName parameter? You need to plan for that, and that's what the compiler is telling you. The FileWriter constructor you're calling throws IOException. IOExceptions (Input/Output Exceptions) occur when there is a problem, usually on the OS-level, accessing / modifying / using a File. This does not mean that you will actually encounter an IOException when using the FileWriter constructor- but you need to catch the IOException just in case.
Here is how you catch an exception:
try {
   someMethod();
} catch (SomeException e) {
   System.out.println("Oh no! An error occured, I should tell the user! " + e.getMessage());
   System.exit(-1);
}In your case, someMethod is replaced by the FileWriter constructor...