// Fig. 6.4: MaximumTest.java
// Finding the maximum of three floating-point numbers.
import java.awt.Container;

import javax.swing.*;

public class MaximumTest extends JApplet {

   // initialize applet by obtaining user input and creating GUI
   public void init()
   {
      // obtain user input
      String s1 = JOptionPane.showInputDialog(
         "Enter first floating-point value" );
      String s2 = JOptionPane.showInputDialog(
         "Enter second floating-point value" );
      String s3 = JOptionPane.showInputDialog(
         "Enter third floating-point value" );

      // convert user input to double values
      double number1 = Double.parseDouble( s1 );
      double number2 = Double.parseDouble( s2 );
      double number3 = Double.parseDouble( s3 );

      double max = maximum( number1, number2, number3 ); // method call

      // create JTextArea to display results
      JTextArea outputArea = new JTextArea();

      // display numbers and maximum value 
      outputArea.setText( "number1: " + number1 + "\nnumber2: " + 
         number2 + "\nnumber3: " + number3 + "\nmaximum is: " + max );

      // get applet's GUI component display area
      Container container = getContentPane();

      // attach outputArea to Container c
      container.add( outputArea );

   } // end method init

   // maximum method uses Math class method max to help
   // determine maximum value
   public double maximum( double x, double y, double z )
   {
      return Math.max( x, Math.max( y, z ) );

   } // end method maximum

} // end class MaximumTest