java - Insert BufferedReader into JTextArea -

dunno if can me out or not. assignment due here in 3 hours , i'm pretty frustrated. cannot file reading display in jtextarea. need do. can out?

public class reader extends javax.swing.jframe {  /**  * creates new form reader  */ public reader() {     initcomponents(); }  public void displaytext(){     jlabel text = new jlabel();     add(text); } /**  * method called within constructor initialize form.  * warning: not modify code. content of method  * regenerated form editor.  */ @suppresswarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="generated code">                           private void initcomponents() {      jlabel1 = new javax.swing.jlabel();     jscrollpane1 = new javax.swing.jscrollpane();     jtextarea1 = new javax.swing.jtextarea();      setdefaultcloseoperation(javax.swing.windowconstants.exit_on_close);      jlabel1.setfont(new java.awt.font("tahoma", 0, 18)); // noi18n     jlabel1.settext("contact info");      jtextarea1.setcolumns(20);     jtextarea1.setrows(5);     jscrollpane1.setviewportview(jtextarea1);     jtextarea1.seteditable(false);      javax.swing.grouplayout layout = new javax.swing.grouplayout(getcontentpane());     getcontentpane().setlayout(layout);     layout.sethorizontalgroup(         layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)         .addgroup(layout.createsequentialgroup()             .addgap(54, 54, 54)             .addcomponent(jscrollpane1, javax.swing.grouplayout.preferred_size, 477, javax.swing.grouplayout.preferred_size)             .addcontainergap(71, short.max_value))         .addgroup(javax.swing.grouplayout.alignment.trailing, layout.createsequentialgroup()             .addcontainergap(javax.swing.grouplayout.default_size, short.max_value)             .addcomponent(jlabel1, javax.swing.grouplayout.preferred_size, 210, javax.swing.grouplayout.preferred_size)             .addgap(176, 176, 176))     );     layout.setverticalgroup(         layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)         .addgroup(javax.swing.grouplayout.alignment.trailing, layout.createsequentialgroup()             .addgap(25, 25, 25)             .addcomponent(jlabel1)             .addpreferredgap(javax.swing.layoutstyle.componentplacement.related, 35, short.max_value)             .addcomponent(jscrollpane1, javax.swing.grouplayout.preferred_size, 301, javax.swing.grouplayout.preferred_size)             .addgap(64, 64, 64))     );      pack();     setlocationrelativeto(null); }// </editor-fold>                          /**  * @param args command line arguments  */ public static void main(string args[]) throws ioexception {     /* set nimbus , feel */     //<editor-fold defaultstate="collapsed" desc=" , feel setting code (optional) ">     /* if nimbus (introduced in java se 6) not available, stay default , feel.      * details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html      */     try {         (javax.swing.uimanager.lookandfeelinfo info : javax.swing.uimanager.getinstalledlookandfeels()) {             if ("nimbus".equals(info.getname())) {                 javax.swing.uimanager.setlookandfeel(info.getclassname());                 break;             }         }     } catch (classnotfoundexception ex) {         java.util.logging.logger.getlogger(reader.class.getname()).log(java.util.logging.level.severe, null, ex);     } catch (instantiationexception ex) {         java.util.logging.logger.getlogger(reader.class.getname()).log(java.util.logging.level.severe, null, ex);     } catch (illegalaccessexception ex) {         java.util.logging.logger.getlogger(reader.class.getname()).log(java.util.logging.level.severe, null, ex);     } catch (javax.swing.unsupportedlookandfeelexception ex) {         java.util.logging.logger.getlogger(reader.class.getname()).log(java.util.logging.level.severe, null, ex);     }     //</editor-fold>      bufferedreader br = new bufferedreader(new filereader("file1.txt"));         try {             stringbuilder sb = new stringbuilder();             string line = br.readline();              while (line != null) {                 sb.append(line);                 sb.append(system.lineseparator());                 line = br.readline();             }             string = sb.tostring();         } {             br.close();         }                 /* create , display form */     java.awt.eventqueue.invokelater(new runnable() {         public void run() {             new reader().setvisible(true);          }     }); }  // variables declaration - not modify                     private javax.swing.jlabel jlabel1; private javax.swing.jscrollpane jscrollpane1; private javax.swing.jtextarea jtextarea1; // end of variables declaration                   } 

move

bufferedreader br = new bufferedreader(new filereader("file1.txt")); try {     stringbuilder sb = new stringbuilder();     string line = br.readline();      while (line != null) {         sb.append(line);         sb.append(system.lineseparator());         line = br.readline();     }     string = sb.tostring(); } {     br.close(); }          

into classes constructor, public reader() {, use jtextarea1.settext(sb.tostring()) apply text jtexarea

public reader() {     initcomponents();     bufferedreader br = new bufferedreader(new filereader("file1.txt"));     try {         stringbuilder sb = new stringbuilder();         string line = br.readline();          while (line != null) {             sb.append(line);             sb.append(system.lineseparator());             line = br.readline();         }         jtextarea1.settext(sb.tostring())     } {         br.close();     }          } 

having said that, you're not managing resources well, consider using more like...

try (bufferedreader myreader = new bufferedreader(new filereader("file1.txt"))) {     string text = null;     while ((text = myreader.readline()) != null) {         jtextarea1.append(text + "\n");     } } catch (ioexception exp) {     exp.printstacktrace(); } 

or more simply...

try (reader myreader = new bufferedreader(new filereader("file1.txt"))) {     jtextarea1.read(myreader, "inventory"); } catch (ioexception exp) {     exp.printstacktrace(); }