java - How can I keep handlers for different buttons in different classes in JFrame? -

i have problem program using jframe. making "cash machine" program, asks user first name, last name, current account state , withdrawal amount. want have 2 classes implements 2 different tasks program does. class card should ask user data said before, , after clicking "accept" button should give message box information "hello [user], have withdrawed [amount], current account state [amount]." if user exceeds "zero state" means wants withdraw more has, program pops message box decline information. second class creditcard same, allows user make debt 1500. have 2 handlers : 1 card works fine after clicking "accept" button , second 1 creditcard doesn't work @ all. know problem proper inheritance, can't solve it. important me store creditcard handler in creditcard class (if it's possible of course).

my code below: card class:

public class card extends jframe {  public jtextfield firstname; public jtextfield lastname; public jtextfield state; public jtextfield withdrawal; private jbutton accept; public jbutton credit_card; private jlabel firstnamelabel;     public card() {     super("cash machine");     setlayout(new flowlayout());      firstnamelabel = new jlabel("first name");     add(firstnamelabel);     firstname = new jtextfield("first name");     add(firstname);      lastname = new jtextfield("last name");     add(lastname);      state = new jtextfield("current account state");     add(state);      withdrawal = new jtextfield("amount of withdrawal");     add(withdrawal);      accept = new jbutton("accept");     add(accept);      credit_card = new jbutton("credit card");     add(credit_card);        handler1 handler = new handler1();     accept.addactionlistener(handler);  }  private class handler1 implements actionlistener {      public void actionperformed(actionevent event) {          string state1 = state.gettext();         int state2 = integer.parseint(state1);         string withdrawal1 = withdrawal.gettext();         int withdrawal2 = integer.parseint(withdrawal1);         int finalstate = state2 - withdrawal2;          // showing final message box         if(event.getsource()==accept)             if(finalstate > 0)             joptionpane.showmessagedialog(null, "hello " + firstname.gettext() + " " + lastname.gettext()  + " .your current account state is: " + finalstate);             else                 joptionpane.showmessagedialog(null,"you out of money on debit account");         }         }            } 

creditcard class:

public class creditcard extends card {  public creditcard(){     handler1 handler = new handler1();     credit_card.addactionlistener(handler); }  private class handler1 implements actionlistener {      public void actionperformed(actionevent event)     {          string state1 = state.gettext();         int state2 = integer.parseint(state1);         string withdrawal1 = withdrawal.gettext();         int withdrawal2 = integer.parseint(withdrawal1);         int finalstate = state2 - withdrawal2;          if(event.getsource()==credit_card)             if(finalstate >= -1500)             joptionpane.showmessagedialog(null, "hello " + firstname.gettext() + " " + lastname.gettext()  + " .your current account state is: " + finalstate);             else                 joptionpane.showmessagedialog(null,"your credit card limit has been reached");     } } 

}

to me seems code working fine. maybe forgot instantiate creditcard instead of card?