Java JFrame Window not appearing when run from Eclipse -

a simple problem. try run simple demo created , display window frame eclipse, , nothing happens. no errors, no window, code runs completion.

i added breakpoints , made sure code runs expected. code straight java tutorials (framedemo), renamed package fit placed (other code package runs fine):

package ui;  import java.awt.*; import javax.swing.*;  /* framedemo.java requires no other files. */ public class framedemo {     /**      * create gui , show it.  thread safety,      * method should invoked      * event-dispatching thread.      */     private static void createandshowgui() {         //create , set window.         jframe frame = new jframe("framedemo");         frame.setdefaultcloseoperation(jframe.exit_on_close);          jlabel emptylabel = new jlabel("");         emptylabel.setpreferredsize(new dimension(175, 100));         frame.getcontentpane().add(emptylabel, borderlayout.center);          //display window.         frame.pack();         frame.setvisible(true);     }      public static void main(string[] args) {         //schedule job event-dispatching thread:         //creating , showing application's gui.         javax.swing.swingutilities.invokelater(new runnable() {             public void run() {                 createandshowgui();             }         });     } } 

my setup (kepler sr2):

• eclipse.buildid=4.3.2.m20140221-1700
• java.version=1.8.0_05
• java.vendor=oracle corporation
• bootloader constants: os=macosx, arch=x86_64, ws=cocoa, nl=en_us
• framework arguments: -product org.eclipse.epp.package.java.product -keyring /users/steve/.eclipse_keyring -showlocation
• command-line arguments: -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.java.product -keyring /users/steve/.eclipse_keyring -showlocation

i checked configuration -> error logs; still nothing, no errors. tried other similar demos, same results.

any appreciated have been stuck on over day.

it turns out had library problem. had had imported jars in .lib directory jfreechart. in reality 2 needed , unnecessary ones labeled swt , experimental. once removed ones not needed, did clean, , rebuilt, worked fine.

oddly, changing order of jfreechart library (which included conflicting jars) bottom did not help, jars had removed.

not jfreechart issue, own library import issue. if run suggest try remove of libraries may conflicting, clean, build, , run again.

thanks hovercraft full of eels , else responded helping me out.