java - Outputting html image and link tags to text files and displaying to user -

i start saying new stackoverflow, please forgive me if make newbie mistakes.

i have been assigned write java swing program searches url (specified user), pull html code, , display image tags , link tags found in html code. of right now, have gui consists of 1 jtextfield user specify url, 2 jtextarea's output link tags , image tags, , search button. once user has searched url, html code read in , if line contains image tag or link tag written corresponding text file. however, narrow down image tags , link tags written text files, rather writing entire line on found. how go doing this?

any appreciated. here have far.

import java.awt.*; import java.awt.event.*; import java.util.*; import javax.swing.*; import java.net.*; import java.io.*;  public class websearch extends jframe {   // create jlabel prompt user, 2 jtextarea's output results,   // jtextfield take user input, , jbutton run application.   private jtextfield inputbox;   private jlabel userprompt;   private jtextarea imageresults;   private jtextarea linkresults;   private jbutton startbutton;    // create constructor add gui components   public websearch()   {     // set title bar     super( "links , images url" );     inputbox = new jtextfield( 33 );     startbutton = new jbutton( "search" );     // add actionlistener detect when action performed     startbutton.addactionlistener( new actionlistener()     {        // override actionperformed method        @override       public void actionperformed( actionevent event )       {         string input = inputbox.gettext();         try         {           url url = new url( input );           bufferedreader in = new bufferedreader( new inputstreamreader( url.openstream() ));           string inputline;           printwriter imagewriter = new printwriter( "images.txt", "utf-8" );           printwriter linkwriter = new printwriter( "links.txt", "utf-8" );           filereader imagereader = new filereader( "images.txt" );           filereader linkreader = new filereader( "links.txt" );           while(( inputline = in.readline() ) != null )           {             if( inputline.contains( "<a href=" ))             {               linkwriter.println( inputline );             }             if( inputline.contains( "<img src=" ))             {               imagewriter.println( inputline );             }          }           imagewriter.close();           linkwriter.close();           imageresults.read( imagereader, "images.txt" );           linkresults.read( linkreader, "links.txt" );           in.close();         }          catch( exception exception )         {         }       } // end actionperformed method     } // end innerclass     ); // end actionlistener     userprompt = new jlabel( "enter url:" );     inputbox.settext( "http://www." );     linkresults = new jtextarea( 8, 33 );     linkresults.seteditable( false );     imageresults = new jtextarea( 8, 33 );     imageresults.seteditable( false );      linkresults.settext( "image tags listed here" );     imageresults.settext( "link tags listed here" );     // create scroll panes jtextarea's     jscrollpane imagescrollpane = new jscrollpane( imageresults );     jscrollpane linkscrollpane = new jscrollpane( linkresults );     // add gui components container     container container = getcontentpane();     container.setlayout( new flowlayout() );     container.add( userprompt );     container.add( inputbox );     container.add( startbutton );     container.add( imagescrollpane );     container.add( linkscrollpane );     setsize( 400, 400 );     setvisible( true );     setdefaultcloseoperation( jframe.exit_on_close );   } // end constructor    // create main method , object of class websearch   public static void main( string[] args )   {     websearch application = new websearch();   } // end main method } // end class 

you might better off relying on html parse library jsoup. may - presuming html formed need parse inside quotes each element. simple way parse between quotes within element:

    string valuetofind = "<img src=\"";     int index = inputline.indexof(valuetofind );     if ( index != -1 ){         stringbuilder link = new stringbuilder();         index += valuetofind.length();         while ( index < inputline.length() && inputline.charat(index) != '"'){             link.append(inputline.charat(index));             index++;         }         system.out.println(link);     } 

note not account multiple tags on single line (easily modified however), , not account html not formed (multiple spaces after img or element line wrapped - think regular expression, or why reinvent wheel , use html parser).