Use FileChooser and loop if file doesn't exist

Use FileChooser and loop if file doesn't exist

I have two seperate methods of opening a file.
The first uses a FileChoser with an additional file type filter.
JFileChooser inFileName = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("PCF & TXT
Files", "pcf", "txt");
inFileName.setFileFilter(filter);
Component parent = null;
int returnVal = inFileName.showOpenDialog(parent);`
The second uses a JOptionPane but has a loop to ensure the directory
chosen exists
String filePath;
File directory;
do{
filePath = JOptionPane.showInputDialog("please enter directory");
directory = new File(filePath);
if (directory.exists()==false){
JOptionPane.showMessageDialog(null,"error with directory");
}
}while(directory.exists()==false);
I'm looking to get the best of both here. To be able to choose a file,
using a file filter and also loop that function should that directory not
be valid.
I've tried switching around variable names and the various functions in
different places but I cant seem to get the loop (".exists" function) to
work.