代码：
//an complex program
import javax.swing.JOptionPane;//import class JOptionPane
public class Complex {
public static void main(String[] args) {
// TODO 自动生成的方法存根
String firstNumber, //first string entered by user
secondNumber; //second string entered by user
int number1, //first number to add
number2, //second number to add
sum, //sum of number1 and number2
difference, //difference of number1 and number2
product, //product of number1 and number2
quotient; //quotient of number1 and number2
// read in first number from user as a string
firstNumber = JOptionPane.showInputDialog("Enter first integer ");
//read in second number from user as a string
secondNumber = JOptionPane.showInputDialog("Enter second integer ");
//convert number from type string to type int
number1 = Integer.parseInt(firstNumber);
number2 = Integer.parseInt(secondNumber);
//add the numbers
sum = number1 + number2;
//difference the numbers
difference = number1-number2;
//product the numbers
product = number1 * number2;
//quotient the numbers
quotient = number1/number2;
//display the results
JOptionPane.showMessageDialog(
null,"The Sum is " + sum,"Results",JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(
null,"The difference is " + difference,"Results",JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(
null,"The product is " + product,"Results",JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(
null,"The quotient is " + quotient,"Results",JOptionPane.PLAIN_MESSAGE);
System.exit(0);//terminate the program
}
}
