Thread: How to specify FileOutputStream location?

So I'm using the following code below to serialize my arraylist of obejcts. it is work except that I want to be able to specify where it outputs the file.

I thought I could change:
FileOutputStream fout = new FileOutputStream("AccList.dat");
to something like:
FileOutputStream fout = new FileOutputStream("C:\Program Files\test\AccList.dat");

but then it just crashes. I kind of understand that its just declaring FileOutputStream as AccList.dat I think... But how do I specify a save location?

says:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )

public void SaveArray()
	{
		/* serialize arraylist */
		try
		{
			System.out.println("serializing list");
			FileOutputStream fout = new FileOutputStream("AccList.dat");
			ObjectOutputStream oos = new ObjectOutputStream(fout);
			oos.writeObject(AAL.accArray);
			oos.close();
		} catch (Exception e)
		{
			e.printStackTrace();
		}
	}// end SaveArray

It's because the backslash is a special character in Java string land. You will need to escape it or turn it into a forwardslash.

FileOutputStream fout = new FileOutputStream("C:\\Program Files\\test\\AccList.dat");

OR

FileOutputStream fout = new FileOutputStream("C:/Program Files/test/AccList.dat");

That should do the trick.

Do you know why I wouldn't be able to load a picture from the internet for example: "http://i52.tinypic.com/307rt36.jpg"
as an icon for a button? It just acts like there isn't one at all.
well I guess not really cause it crashes if there is nothing there. but still?

Icon sword1 = new ImageIcon ( ("http://i52.tinypic.com/307rt36.jpg"));

so I imported these:
import java.net.MalformedURLException;
import java.net.URL;
and
I put this into my code:
try

		{
			Icon sword2 = new ImageIcon(new URL(
					"http://i52.tinypic.com/307rt36.jpg"));
		} catch (MalformedURLException e)
		{
			e.printStackTrace();
		}

But now this wont work.



fancyJButton.setRolloverIcon(sword2); // set rollover image
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
sword2 cannot be resolved to a variable

at JTabbedPaneFrame.<init>(JTabbedPaneFrame.java:41)
at JTabbedPaneDemo.main(JTabbedPaneDemo.java:9)

I tried looking at the api before too but it didn't work for me when i tried it.
I don't think I was doing it right cause all it said is:
ImageIcon(URL location)

In the code you posted, the Icon 'sword2' is declared as a local variable inside the 'try' scope of a 'try..catch'. This means it is local to that block and disappears at the end, i.e. when the closing curly brace } is reached. If you want it to be accessible to other code, either put that other code inside the 'try' scope, i.e. after the 'sword2' declaration (this is how 'try...catch' is generally used), or move the declaration (but not the initialization) of 'sword2' outside the 'try' scope so it is in the scope of the code that wants to use it.