How to Add multiple textbox values and showing their sum in Java

How To Add A number of Textbox Values And Displaying Their Sum In Java. How can we add a number of textboxes information and present their end in an different textbox utilizing GUI or utilizing a button.

• Use TextField to Enter a number of information in Java
• Get Values from A number of textbox
• Java GUI use one button to add a number of textual content fields to a textual content file
• how one can insert worth in a number of textual content field in java

import java.awt.; import java.awt.occasion.;
 class kframe extends Body implements ActionListener
 { 
   Checkbox pizza,pepsi,salad;
   Label amount,complete;
   TextField q1,q2,q3,t1;
   Button calculate;
   kframe()
  {  
    tremendous("Place Your Order");  
    setBounds(150,150,320,310);
   setBackground(new Shade(55,105,155));
    addWindowListener(new WindowAdapter()
                       {
                        public void windowClosing(WindowEvent we)
                         {
                          System.exit(0);
                          }
                       });
    setLayout(null);

salad=new Checkbox("SALAD = 50");
    salad.setBounds(40,110,130,35);
    salad.setFont(new Font("Monotype Corsiva",Font.BOLD,20));
q1=new TextField(35);

    q1.setBounds(180,75,100,25);
    q1.setFont(new Font("Monotype Corsiva",Font.BOLD,20));
q1.setText("1");

q3=new TextField(35);
    q3.setBounds(180,145,100,25);
    q3.setFont(new Font("Monotype Corsiva",Font.BOLD,20)); 
    q3.setText("1");

amount=new Label("QUANTITY ");
    amount.setBounds(180,40,130,25);
    amount.setFont(new Font("Monotype Corsiva",Font.BOLD,20));

calculate=new Button("Calculate ");
    calculate.setBounds(100,250,100,25);
    calculate.setBackground(new Shade(55,255,55));
    calculate.setFont(new Font("Monotype Corsiva",Font.BOLD,20));
    calculate.addActionListener(this);

setVisible(true);
   }

public void actionPerformed(ActionEvent ae)
   {
    int t=0,f=0;
    String str=" ";
   if(ae.getSource()==calculate)
     {
      if(pizza.getState())
         t=t+(500Integer.parseInt(q1.getText()));
         if(pepsi.getState())
         t=t+(50Integer.parseInt(q2.getText()));
      if(salad.getState())
      t=t+(50*Integer.parseInt(q3.getText()));
     t1.setText(str.valueOf(t));
      }
   }
 }
 class b4
 {
 public static void major(String str[])
 {
 kframe f=new kframe();
 }
 }