java - What do I do in order to make my Madlibs program accessible from this log in/password program? -

(first post on stack, woopee!) wrote madlibs program takes in user input, , makes story out of it. made user log in program want test using mad libs program. works fine, there 1 problem , i'll go through it. problem starts out log in screen. once use input proper keywords(dodo , foo), log in screen logs in, turns off, , calls madlibsgui program. here's problem: when this, reason madlibsgui program spawns 2 windows. have suspicious problem lies in madlibsgui's main method . i've tried fixing already, , hasn't seemed work. program works fine, 2 windows bother me. i'll post both code classes below read , at. both simple (i'm beginner programmer), shouldn't have of problem them. if have additional comments or corrections, please don't hesitate correct them.

loginscreen:

package passwordprogram;  import java.awt.borderlayout; import java.awt.color; import java.awt.gridbagconstraints; import java.awt.gridbaglayout; import java.awt.event.actionevent; import java.awt.event.actionlistener;  import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.jpasswordfield; import javax.swing.jtextfield; import javax.swing.uimanager;  import madlibs.madlibsgui;  public class loginscreen implements actionlistener {       public static void main(string[] args) {         try {         uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname());         }          catch (exception e) {         }         loginscreen logger = new loginscreen();         logger.start();     }      jbutton login;     jframe frame;     jtextfield username;     jpasswordfield password;     jlabel title;      public void start() {         frame = new jframe();         jpanel panel = new jpanel();          panel.setbackground(color.red);          jbutton login = new jbutton("log in");         login.addactionlistener(this);           title = new jlabel("welcome username/password system");         jlabel usernametxt = new jlabel("username: ");         username = new jtextfield(15);          jlabel passwordtxt = new jlabel("password: ");         password = new jpasswordfield(15);          frame.getcontentpane().add(borderlayout.center, panel);         frame.getcontentpane().add(borderlayout.south, login);         frame.getcontentpane().add(borderlayout.north, title);          panel.setlayout(new gridbaglayout());         gridbagconstraints left = new gridbagconstraints();         left.anchor = gridbagconstraints.east;         gridbagconstraints right = new gridbagconstraints();         right.weightx = (int) 2;         right.fill = gridbagconstraints.horizontal;         right.gridwidth = gridbagconstraints.remainder;         panel.add(usernametxt, left);         panel.add(passwordtxt, right);         panel.add(username, right);         panel.add(passwordtxt, left);         panel.add(password, right);          login.addactionlistener(this);          frame.setvisible(true);         frame.setsize(500, 300);     }      public void actionperformed(actionevent event) {         if (username.gettext().equals("dodo") && new string(password.getpassword()).equals("foo")) {             madlibsgui mlibs = new madlibsgui();             mlibs.start();             frame.setvisible(false);         } else {             title.settext("invalid username/password. please try again.");         }     } } 

madlibsgui class:

package madlibs;  import java.awt.borderlayout; import java.awt.color; import java.awt.gridbagconstraints; import java.awt.gridbaglayout; import java.awt.event.actionevent; import java.awt.event.actionlistener;  import javax.swing.borderfactory; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.jtextarea; import javax.swing.jtextfield; import javax.swing.uimanager;  public class madlibsgui implements actionlistener {      jframe frame;     jpanel panel;       jtextfield nametxt;     jtextfield verbtxt1;     jtextfield adjtxt;     jtextfield verbtxt2;     jtextfield nountxt;      jtextarea story;      public void start() {         jframe frame = new jframe();         jpanel panel = new jpanel();         jbutton madlibbutton = new jbutton("lib it!");          story = new jtextarea();          jlabel title = new jlabel("welcome mad libs! \n put in words , press 'lib it' button play!");         jlabel namelabel = new jlabel("name: ");         jlabel verblabel1 = new jlabel("verb: ");         jlabel adjlabel = new jlabel("adjective: ");         jlabel verblabel2 = new jlabel("verb: ");         jlabel nounlabel = new jlabel("noun: ");          nametxt = new jtextfield(25);         verbtxt1 = new jtextfield(25);         adjtxt = new jtextfield(25);         verbtxt2 = new jtextfield(25);         nountxt = new jtextfield(25);          frame.getcontentpane().add(borderlayout.south, story);         frame.getcontentpane().add(borderlayout.north, title);          panel.setlayout(new gridbaglayout());         panel.setbackground(color.green);         frame.getcontentpane().add(panel);         gridbagconstraints left = new gridbagconstraints();         left.anchor = gridbagconstraints.east;         gridbagconstraints right = new gridbagconstraints();         right.weighty = 1.2;         gridbagconstraints middle = new gridbagconstraints();         middle.anchor = gridbagconstraints.center;          right.fill = gridbagconstraints.horizontal;         right.gridwidth = gridbagconstraints.remainder;         panel.add(namelabel, left);         panel.add(nametxt, right);         panel.add(verblabel1, left);         panel.add(verbtxt1, right);         panel.add(adjlabel, left);         panel.add(adjtxt, right);         panel.add(verblabel2, left);         panel.add(verbtxt2, right);         panel.add(nounlabel, left);         panel.add(nountxt, right);         panel.add(madlibbutton, right);         panel.setborder(borderfactory.createemptyborder(5, 5, 5, 5));         frame.pack();         frame.setvisible(true);         frame.setsize(615, 500);          madlibbutton.addactionlistener(this);     }      public void actionperformed(actionevent event) {         string text =  ("\tthere once boy named " + nametxt.gettext() + " loved " + verbtxt1.gettext()                 + ". \n\tone day, " + nametxt.gettext() + " walking down street when saw " +                  adjtxt.gettext() + " bird \n\twas hurt. quietely said, \" it's okay \n\tlittle bird, " +                 "won't hurt you!\" instead, " + nametxt.gettext() + "\n\tdecided going " +                 " " + verbtxt2.gettext() + " bird! sadly, bird \n\t" + verbtxt2.gettext() + "ed too" +                 " much. " + nametxt.gettext() + " sad. \n\the sat in room, playing " +                  nountxt.gettext() + ". \n\n \t\t\t|the end|");         story.append(text);     }      public static void main(string[] args) {         try {             uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname());         } catch (exception e) {             e.printstacktrace();         }          madlibsgui main = new madlibsgui();         main.start();     }  } 

you call following twice in method start():

    login.addactionlistener(this); 

which means each time button clicked actionperformed() method executed twice.