java - Processing a file with JFileChooser -

hey guys running issue program. trying program show text files, , once user selects one, file information should displayed in textbox in gui. getting error:

filechooserdemo3.java:66: error: unreported exception ioexception; must caught or declared thrown while ((strline = br.readline()) != null) {

why happening? have catch statement.. help!

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.scanner; import java.io.*;  class filechooserdemo3{     jlabel jlab;    jbutton jbtnshow;    jfilechooser jfc;    jtextarea jta;    jscrollpane scrollpane;     filechooserdemo3() {       //create new jframe container.       jframe jfrm = new jframe("jfilechooser demo");        //specify flowlayout layout manager       jfrm.setlayout(new flowlayout());        //give frame initial size       jfrm.setsize(800,800);        //end program when user closes application       jfrm.setdefaultcloseoperation(jframe.exit_on_close);        //create label show selected file       jlab=new jlabel();        //create button show dialog       jbtnshow = new jbutton("show file chooser");        //create textarea ability textwrap (p889-891) , scroll (hint:  use jscrollpane)       jtextarea textinput = new jtextarea(20, 40);       textinput.setlinewrap(true);       jscrollpane scrollpane = new jscrollpane(textinput);           //create file chooser starting @ default directory       jfc=new jfilechooser();        //show file chooser when show file chooser button pressed       jbtnshow.addactionlistener(new actionlistener()  {          public void actionperformed(actionevent le) {             //pass null parent.  centers dialog on screen.             int result = jfc.showopendialog(null);              if(result==jfilechooser.approve_option){                jlab.settext("selected file is:  " + jfc.getselectedfile().getname());                 //get selected file stored file.                    try{                   //do file processing here                  string strline;                  file selectedfile = jfc.getselectedfile();                  fileinputstream in = new fileinputstream(selectedfile);                  bufferedreader br = new bufferedreader(new inputstreamreader(in));                  while ((strline = br.readline()) != null) {                      textinput.append(strline + "\n");                  }                }                 catch(filenotfoundexception e){                   system.out.println("exception");                }                }             else{                jlab.settext("no file selected.");             }          }       });           //add show file chooser button , label content pane          jfrm.add(jbtnshow);          jfrm.add(jlab);            //display frame          jfrm.setvisible(true);    }     public static void main(string[] args){       //create gui on event dispatching thread.       swingutilities.invokelater(new runnable() {          public void run() {             new filechooserdemo3();          }       });    } } 

you catching filenotfoundexception, need catch ioexception after try {} block.

programmatically, because readline declares throws ioexception. translated, it's saying after file opened, still encounter problem reading file.