import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class  SumOfDigits{
    public static void main(String[] args){
    Frame f=new Frame();
    Label label1=new Label("Enter Number: ");
    Label label2=new Label("Sum of Digits: ");
    final TextField text1=new TextField(20);
    final TextField text2=new TextField(20);
    Button b=new Button("Find");
    b.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        String v1=text1.getText();
        int sum=0;
        int n = Integer.parseInt(v1);
                int t = n;
                while (n > 0) {
                        int p = n % 10;
                        sum = sum + p;
                        n = n / 10;
                }
                text2.setText(Integer.toString(sum));

         }
        });
        Panel p=new Panel(new GridLayout(3,2));
        p.add(label1);
        p.add(text1);
        p.add(label2);
        p.add(text2);
        p.add(b);
        f.add(p);
        f.setVisible(true);
        f.pack();
    }
}