GUI==>Graphical User Interface In Java

Program:

package java_tutorial_1;

import javax.swing.JOptionPane;
public class gui {
public static void main(String[] args){
String fn=JOptionPane.showInputDialog("Enter first number: ");
String sn=JOptionPane.showInputDialog("Enter second number: ");

int num1=Integer.parseInt(fn);
int num2=Integer.parseInt(sn);

int res=num1+num2;
JOptionPane.showMessageDialog(null,"answer "+ res,"title", JOptionPane.PLAIN_MESSAGE);
}

}

Screenshots

Program

Output 1

Output 2

Output 3