import javax.swing.*;
public class RainFall
{
public static void main(String[] args)
{
double average;
String m1 = JOptionPane.showInputDialog("Enter month>>");
String str = JOptionPane.showInputDialog("Amount rain (mm)");
double rain_m1=Double.parseDouble(str);
String m2 = JOptionPane.showInputDialog("Enter month>>");
str = JOptionPane.showInputDialog("Amount rain (mm)");
double rain_m2=Double.parseDouble(str);
String m3 = JOptionPane.showInputDialog("Enter month>>");
str = JOptionPane.showInputDialog("Amount rain (mm)");
double rain_m3=Double.parseDouble(str);
average = (rain_m1+rain_m2+rain_m3)/3;
JOptionPane.showMessageDialog(null,"The average rainfall for "+m1+ ", "+
m2+" and "+m3+" is " +average,"RainFall",JOptionPane.INFORMATION_MESSAGE);
}
}