Two conditions to check in JFrame

I'm using the JCreator to design a JFrame that's supposed to calculate Daily Calories Intake and I need to check two conditions JComboBox (male/female) and whether the calculate button is clicked or not.

I think it's easier if I show the actionperformed method - here it is:

public void actionPerformed(ActionEvent ae)
{  
    String s1 = ae.getActionCommand();
    String s2 = (String)gender.getSelectedItem(); 

    double a=Double.parseDouble(t1.getText()); 
    double w=Double.parseDouble(t2.getText());
    double h=Double.parseDouble(t3.getText());



           if(s2.equals("Female"))
            { calo=fCalo(w,h,a);}
   else if(s2.equals("Male"))
           { calo=mCalo(w,h,a);}


    if(s1.equals("Calculate"))
    {  
           t4.setText(String.valueOf(calo+650));
           t5.setText(String.valueOf(calo));
           t6.setText(String.valueOf(calo-500));
    }
}

I tried also doing this:

    if(s1.equals("Calculate"))

    {  

                   if(s2.equals("Female"))
            { calo=fCalo(w,h,a);}
   else if(s2.equals("Male"))
           { calo=mCalo(w,h,a);}
           t4.setText(String.valueOf(calo+650));
           t5.setText(String.valueOf(calo));
           t6.setText(String.valueOf(calo-500));
    }
 }

But it keep giving me error message whenever I choose male or female and nothing happens. I mean results is not showing. I literally tried everything. The second part of my program have similar code to this and it do check the two conditions then show results perfectly.