How can i open up a file and view it

I know the following snippet does not have the functionality of opening a file for viewing.

JFileChooser open = new JFileChooser();
    int option = open.showOpenDialog( this );
        if( optio开发者_开发知识库n == JFileChooser.APPROVE_OPTION ) {
            try {
              Scanner scanner = new Scanner( new FileReader( open.getSelectedFile().getPath() ) );
                //while( scanner.hasNext() )

            } catch(Exception exc) {
                System.out.println(exc);
              }

This snippet presents a file chooser for opening a file

In this snippet what should i do so that i am able to view the file (as i double click it)?

It could be any file in any directory

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Take a look at the Desktop API: http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javase6/desktop_api/

Desktop desktop = Desktop.getDesktop();
File file = new File("your_file.ext");
desktop.open(file);