Design an AWT application to check whether the number entered in textbox is prime or not.

Source Code:-

import java.awt.*;

import java.awt.event.*;

class Prime extends Frame implements ActionListener

{

        TextField tf1,tf2;

        public Prime()

        {

 

                setLayout(new FlowLayout());

                Label lb1=new Label("Enter Number:");

                Label lb2=new Label("The Number is:");

 

                tf1=new TextField(15);

                tf2=new TextField(15);

 

                Button btn1=new Button("Calculate");

 

                add(lb1);

                add(tf1);

                add(lb2);

                add(tf2);

                add(btn1);

 

                btn1.addActionListener(this);

        }

        public static void main(String ar[])

        {

                Prime fr=new Prime();

                fr.setSize(300,300);

                fr.setTitle("Calculate Prime");

                fr.setVisible(true);

        }

 

        public void actionPerformed(ActionEvent ae)

        {

        int flag = 0,num;

                num=Integer.parseInt(tf1.getText());

        for(int i = 2; i <= num/2; i++)

        {

            if(num % i == 0)

            {

                flag = 1;

                break;

            }

        }

        if (flag==0)

            tf2.setText("prime number.");

        else

             tf2.setText("not prime number.");

        }

}

 

 Output :-