Favorite Color

   import java.awt.*;
   import java.awt.event.*;
   import javax.swing.*;
   
   public class ExerciseText
   {
      public static void main(String [] args)
      {
         MyFrame frame = new MyFrame("Favorite Color");
         frame.pack();
         frame.setLocation(100, 75);
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      }
   }
   
   class MyFrame extends JFrame
   {
      JLabel favorite = new JLabel("Enter your favorite color:");
      JTextField text = new JTextField(20);
      
      public MyFrame(String s)
      {
         super(s);
         setLayout(new FlowLayout());
         
         add(favorite);
         add(text);
         
         text.addActionListener(new FavHandler());  // attach handler to text field
      }
      
      class FavHandler implements ActionListener
      {
         public void actionPerformed(ActionEvent event)
         {
            String s = text.getText();
            String response = s + " is nice";
            text.setText(response);
         }
      }
   }