Calling a variable from another method

i'm quite new in eclipse and having a problems with calling variables from other methods,such as:

    btnNewButton.addMouseListener(new MouseAdapter() {
         @Override
         public void mouseClicked(MouseEvent arg0) {
 
             final JFileChooser fc = new JFileChooser();
             int returnVal = fc.showDialog(fc, null);
 
             if (returnVal == JFileChooser.APPROVE_OPTION) {
                 File prnfile = new File(fc.getSelectedFile().toString());
 
             }
 
         }
 
     });
     btnNewButton.setBounds(54, 164, 89, 23);
     frame.getContentPane().add(btnNewButton);
 
     JButton btnNewButton_1 = new JButton("print");
     btnNewButton_1.addMouseListener(new MouseAdapter() {
         @Override
         public void mouseClicked(MouseEvent e) {
 
 
               File file = new File(prnfile);
                 int ch;
                 StringBuffer strContent = new StringBuffer("");
                 FileInputStream fin = null;
                 try {
                   fin = new FileInputStream(file);
                   while ((ch = fin.read()) != -1)
                     strContent.append((char) ch);
                   fin.close();
                 } catch (Exception e1) {
                   System.out.println(e);
                 }
 
 
 
     });
     btnNewButton_1.setBounds(257, 164, 89, 23
 

Now,how can i call "prnfile" from the other method?Normally i would create a public object in c# but it doesnt work in Eclipse,so i dunno where to go (being a complete noob :) )

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