java - Call to jFrame from jInternalFrame does not work -

i have main jframe homepage.java , many other classes extend javax.swing.jinternalframe. 1 of classes (jinternalframe) login.java. check whether password correct in login.java , if password correct, load success.java. problem arises when have load success.java page.

have function in homepage.java purpose remove internal frames , load success.java class. function follows :-

public void login(){     jdesktoppane1.removeall();     system.out.println("pos 2");     success frame = new success();     frame.setvisible(true);     jdesktoppane1.add(frame);     setcontentpane(jdesktoppane1);     try {         frame.setselected(true);     } catch (java.beans.propertyvetoexception e) {     } } 

i call function in login.java page follows :-

system.out.println("pos 1 "); (new homepage()).login(); 

the logic not work. but, receive output

pos 1 pos 2 

which shows program flow correct. not error also. weird factor when calthe same login() function menu in jframe itself, desired output. please solve dilemma. surely appreciated!

this code:

system.out.println("pos 1 "); (new homepage()).login(); 

creates new homepage object , calls method on it. oh calling correct method, , it's going homepage instance, it's not correct homepage instance, not 1 that's displayed, because you've created new one.

short term solution: valid reference displayed homepage instance , call method on it. passing class needs constructor or method parameter, or use swingutilities.getwindowancestor(...).

i.e.,

window window = swingutilities.getwindowancestor(login.this); if (window instanceof homepage) {   homepage validhomepageref = (homepage) window;   validhomepageref.login(); } 

long term solution: don't create spaghetti code gui objects changing behaviors of other gui objects, instead refactor code la mvc or 1 of variants, gui can change model , other gui objects can notified of these changes via listeners , respond if want.