JTextField till String till Txt fil

		    public void actionPerformed(ActionEvent e){

		    	s = text.getText();
		    	skriv();
				System.out.println(s);
				
		    }
		   	});
		
		knapp2.addActionListener(new ActionListener(){

		    public void actionPerformed(ActionEvent e){
		    	s1.öppna();
		    	//s1.skriv();
				System.out.println("Du har skrivit");	
				try {
					Runtime.getRuntime().exec("cmd /c start HelloName.bat");
					System.out.println("Det funkar!");
				} catch (IOException e1) {
					e1.printStackTrace();
					System.out.println("Det funkar inte!");
				}
				
		    }		
			});
		

}
	public static void skriv(){
		X.format("%s%s", "@echo off Hello" +  s + "pause");
	}
}

BufferedWriter writer = null;
try
{
    writer = new BufferedWriter( new FileWriter( yourfilename));
    writer.write( yourstring);

}
catch ( IOException e)
{
}
finally
{
    try
    {
        if ( writer != null)
        writer.close( );
    }
    catch ( IOException e)
    {
    }
}