//These are some of the standard "imports" we'll be using, explained in class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;

public class PowersMethod extends Applet implements ActionListener {

   JTextArea  output;
   JTextField base, exponent;
   JButton button;


   public void init() {

      setLayout(new BorderLayout());

      // Create the text-area and button we'll use
      base  = new JTextField(8);
      exponent = new JTextField(8);
      output = new JTextArea();
      button = new JButton("Compute Power!");

      // Next we create a "panel" that we add button to
      JPanel p = new JPanel();
      p.setLayout(new FlowLayout());
      p.add(new JLabel("base: "));
      p.add(base);
      p.add(new JLabel("exponent: "));
      p.add(exponent);
      p.add(button);

      // Finally, to finish building the UI, we simply add the text and the panel
      // (which contains the button) to the applet
      add("Center", new JScrollPane(output));
      add("South", p);

      // Lastly, we instruct the applet to "listen" for the button to be pressed
      button.addActionListener(this);
   }

   int power(int base, int exponent) {

      int answer = 1;
      for (int i = 0; i < exponent; i++) {
         answer = answer * base;
      }

      return answer;
   }

   public void actionPerformed(ActionEvent evt) {

	   // Get the base and exponent from input, convert to numbers
	   int iBase = Integer.parseInt(base.getText());
	   int iExponent = Integer.parseInt(exponent.getText());
	   
	   // Display the result...
       output.append(iBase + "^" + iExponent + " = " + power(iBase, iExponent) + "\n");

   }
}