swing - Java Applet JFileChooser button issue? -

     if ("analyze text file".equals(command)) {     jfilechooser chooser = new jfilechooser();     chooser.setmultiselectionenabled(true);     if (chooser.showopendialog(null) == jfilechooser.approve_option) {         file[] files = chooser.getselectedfiles();         (file file : files) {             try {                 bufferedreader reader = new bufferedreader(new filereader(file));                     sb.append(line);                 }                 string text = sb.tostring();                 map<integer, integer> counts = getcounts(text)                 histogrampanel panel = new histogrampanel(width, counts, height, horizon             } catch (exception ex) {                 ex.printstacktrace();             }         }     } 

i trying jfilechooser pop once click "analyze text" button, allow user select text file processed code , output bar chart.
working except button reason. if can appreciated.

    // object textfile = null;    else if("text".equals(command)) {     jfilechooser chooser = new jfilechooser();     filenameextensionfilter filter = new filenameextensionfilter(           "txt", "text", "docx");       chooser.setfilefilter(filter);  int returnval = jfilechooser.showopendialog(null);        if (returnval == jfilechooser.approve_option) {            file file = jfilechooser.getselectedfile();            map<integer, integer> counts = getcounts(stext);            int width = counts.size() * bar            int horizon = height - 25;            histogrampanel panel = new histogrampanel(width, counts, height, horizon);         }    }    } 

"once click "analyze text" button,"

could maybe actioncommand not "text" , should checking if "analyze text"

if ("text".equals(command)) { → if ("analyze text".equals(command)) {

// or whatever text/actioncommand of button is

another seemingly obvious problem, have declared jfilechooser chooser you're trying access filechooser

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update

use code. change button text back. if doesn't work, changed else in code, , can't help, because works fine me.

    if ("analyze text file".equals(command)) {         jfilechooser chooser = new jfilechooser();         int result = chooser.showopendialog(null);         if (result == jfilechooser.approve_option) {             try {                 file file = chooser.getselectedfile();                 bufferedreader reader = new bufferedreader(new filereader(file));                 stringbuilder sb = new stringbuilder();                 string line;                 while ((line = reader.readline()) != null) {                     sb.append(line);                 }                 string text = sb.tostring();                 map<integer, integer> counts = getcounts(text);                 int width = counts.size() * bar_width;                 int max = maxcount(counts);                 int height = max * increment + 100;                 int horizon = height - 25;                 histogrampanel panel = new histogrampanel(width, counts, height, horizon);                 joptionpane.showmessagedialog(null, panel);             } catch (ioexception ex) {                 ex.printstacktrace();             }         }     }