// Fig. 6.3: SquareIntegers.java
// Creating and using a programmer-defined method.
import java.awt.Container;

import javax.swing.*;

public class SquareIntegers extends JApplet {

   // set up GUI and calculate squares of integers from 1 to 10
   public void init()
   {
      // JTextArea to display results
      JTextArea outputArea = new JTextArea();

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

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

      int result;          // store result of call to method square
      String output = "";  // String containing results

      // loop 10 times
      for ( int counter = 1; counter <= 10; counter++ ) {
         result = square( counter );  // method call

         // append result to String output 
         output += "The square of " + counter + " is " + result + "\n";

      } // end for 

      outputArea.setText( output );  // place results in JTextArea

   } // end method init
   
   // square method declaration 
   public int square( int y )
   {
      return y * y;  // return square of y

   } // end method square

} // end class SquareIntegers


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