java - Get focus for JTextField in JFileChooser (NimbusLookAndFeel) -

by default, jfilechooser in nimbuslookandfeel doesn't show focus on jtextfield user types file path. focus owner in jfilechooser jcombobox show in figure.

now how focus jtextfield when user opens jfilechooser. tried doing requestfocusinwindow() on jtextfield getting jfilechooser through recursive logic. here full code have done.

import javax.swing.*; import java.awt.*; import java.awt.event.*; class getfocusforjtextfield extends jframe { jbutton jb; jfilechooser jf;      public getfocusforjtextfield()     {         createandshowgui();     }      private void createandshowgui()     {         // nimbuslookandfeel, jtextfield not         // default focus owner in jfilechooser         try         {             uimanager.setlookandfeel("javax.swing.plaf.nimbus.nimbuslookandfeel");         }catch(exception e){}          settitle("get focus jtextfield");         setlayout(new flowlayout());         setsize(400,400);         setvisible(true);         setdefaultcloseoperation(exit_on_close);          jb=new jbutton("open jfilechooser");         jb.addactionlistener(new actionlistener(){             public void actionperformed(actionevent ae)             {                 showdialog();             }         });          jf=new jfilechooser();          add(jb);     }      // loop find jtextfield, first     // jtextfield in jfilechooser     private void grabfocusfortextfield(component[] c)     {         for(component k:c)         {             if(k instanceof jtextfield)             {                 jtextfield jt=(jtextfield)k;                 jt.requestfocusinwindow();                 break;             }             else if(k instanceof jpanel)             {                 jpanel jp=(jpanel)k;                 grabfocusfortextfield(jp.getcomponents());             }         }     }      private void showdialog()     {         jf.showopendialog(this);         grabfocusfortextfield(jf.getcomponents());     }      public static void main(string args[])     {         swingutilities.invokelater(new runnable(){             public void run()             {                 new getfocusforjtextfield();             }         });     } } 

still unable focus. why not getting this.

the thing here upon call grabfocusfortextfield() jtextfield not displayable result cannot focus jtextfield. component focus, component must exist first, visible , displayable, enabled , focusable. see focus subsystem in docs more.

you have register own hierarchylistener on jfilechooser listen hierarchyevent. in nimbuslookandfeel either might not done or jcombobox chosen focus owner. whenever component displayable, whenever jfilechooser's hierarchy changed, event fired , @ time, jtextfield displayable.

i have rewritten code make work.

import javax.swing.*; import java.awt.*; import java.awt.event.*; class getfocusforjtextfield extends jframe { jbutton jb; jfilechooser jf;      public getfocusforjtextfield()     {         createandshowgui();     }      private void createandshowgui()     {         // nimbuslookandfeel, jtextfield not         // default focus owner in jfilechooser         try         {             uimanager.setlookandfeel("javax.swing.plaf.nimbus.nimbuslookandfeel");         }catch(exception e){}          settitle("get focus jtextfield");         setlayout(new flowlayout());         setsize(400,400);         setvisible(true);         setdefaultcloseoperation(exit_on_close);          jb=new jbutton("open jfilechooser");         jb.addactionlistener(new actionlistener(){             public void actionperformed(actionevent ae)             {                 showdialog();             }         });          jf=new jfilechooser();          // if add other jtextfield         // accessory jfilechooser         jf.setaccessory(new jtextfield(20));          jf.addhierarchylistener(new hierarchylistener(){             public void hierarchychanged(hierarchyevent he)             {                 grabfocusfortextfield(jf.getcomponents());             }         });               add(jb);     }      // loop find jtextfield, first     // jtextfield in jfilechooser     // if setaccessory contains jtextfield     // or jtextfield itself, not focus     private void grabfocusfortextfield(component[] c)     {         for(component k:c)         {             if(k instanceof jtextfield)             {                 jtextfield jt=(jtextfield)k;                 jt.grabfocus();                 break;             }             else if(k instanceof jpanel)             {                 jpanel jp=(jpanel)k;                 grabfocusfortextfield(jp.getcomponents());             }         }     }      private void showdialog()     {         jf.showopendialog(this);     }      public static void main(string args[])     {         swingutilities.invokelater(new runnable(){             public void run()             {                 new getfocusforjtextfield();             }         });     } } 

you can use requestfocusinwindow() instead of grabfocus()