comparenums2.txt

java的一经典教程

// Inputs three integers and prints out the
// largest and smallest

import javax.swing.JOptionPane;

public class CompareNums2
{

   public static void findBiggestAndSmallest()
   {
	  int num1, num2, num3;
      String numStr;

	  numStr = JOptionPane.showInputDialog(
	     "Enter first number: " );
      num1 = Integer.parseInt(numStr);

	  numStr = JOptionPane.showInputDialog(
	     "Enter second number: " );
	  num2 = Integer.parseInt(numStr);

      numStr = JOptionPane.showInputDialog(
	     "Enter third number: " );
      num3 = Integer.parseInt(numStr);

	  if ((num1 > num2) && (num1 > num3))
	  // i.e. num1 is the largest
      {
		  JOptionPane.showMessageDialog(null,
		     "Largest is " + num1);

      	  if (num2 < num3)
      	 	  JOptionPane.showMessageDialog(null,
			     "Smallest is " + num2);
	      else
      		  JOptionPane.showMessageDialog(null,
			     "Smallest is " + num3);
	  }
      else if (num2 > num3)
	  // num2 is the largest
	  {
   		  JOptionPane.showMessageDialog(null,
		     "Largest is " + num2);

          if (num1 < num3)
      		  JOptionPane.showMessageDialog(null,
			     "Smallest is " + num1);
          else
        	  JOptionPane.showMessageDialog(null,
			     "Smallest is " + num3);
      }

      else // num3 must be the largest
      {
		  JOptionPane.showMessageDialog(null,
		     "Largest is " + num3);

		  if (num1 < num2)
			 JOptionPane.showMessageDialog(null,
			    "Smallest is " + num1);
          else
      		 JOptionPane.showMessageDialog(null,
			    "Smallest is " + num2);
      }
   }


   public static void main(String[] args)
   {
      findBiggestAndSmallest();

      System.exit(0);
   }
}