1，源程序：
/*输入两个数，求其加减乘除，并用消息框显示计算结果*/
/*2015 10 3*/
/*Duo Ya Fan*/
import javax.swing.JOptionPane;
// import class JOptionPane
public class Addition {
public static void main( String args[] ) {
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
divide //divide 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 numbers from type String to type int
number1 = Integer.parseInt( firstNumber );
number2 = Integer.parseInt( secondNumber );
// add the numbers
sum = number1 + number2;
//reduct the numbers
difference=number1-number2;
//multiply the numbers
product=number1*number2;
//divide the numbers
divide=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 divide is " + divide, "Results", JOptionPane.PLAIN_MESSAGE );
System.exit( 0 ); // terminate the program
}
}
2
运行Test.java的结果。
原文：http://www.cnblogs.com/fanduo/p/4859695.html