java (Joption) arimatik

[Badguy13]

malam bro

mau tanya ni bro



kan saya lagi bikin program java ni memakai JOption

tapi kok fungsi arimatiknya gak jalan ya bro suka eror



liat deh betul gak syntaknya tolong di share thanks




Code:

import javax.swing.JOptionPane;

public class radiancy
{
public static void main( String[] args ){

String input = "";
String input2 = "";
String result = "";

input = JOptionPane.showInputDialog("Masukan input pertama");
input2 = JOptionPane.showInputDialog("Masukan input pertama");

result = input * input2;
String msg = input + " * " + input2 + " = " + result + " !";

JOptionPane.showMessageDialog(null, msg);
}
}

kok dia string resultnya gak mau di kaliin ya gan eror mulu tolong ya gan ;D