// Example of JTextArea - Copying selected text from one textarea to another. 
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JButton;
import javax.swing.JScrollPane;

public class TextAreaFrame extends JFrame 
{
   private JTextArea textArea1; // displays demo string
   private JTextArea textArea2; // highlighted text is copied here
   private JButton copyJButton; // initiates copying of text

   // no-argument constructor
   public TextAreaFrame() 
   {
      super( "TextArea Demo" ); 
      Box box = Box.createHorizontalBox(); // create box
      String demo = "This is a demo string to\n" + 
         "illustrate copying text\nfrom one textarea to \n" +
         "another textarea using an\nexternal event\n";

      textArea1 = new JTextArea( demo, 10, 15 ); // create textarea1
      box.add( new JScrollPane( textArea1 ) ); // add scrollpane

      copyJButton = new JButton( "Copy >>>" ); // create copy button
      box.add( copyJButton ); // add copy button to box
      copyJButton.addActionListener(

         new ActionListener() // anonymous inner class
         {   
            // set text in textArea2 to selected text from textArea1
            public void actionPerformed( ActionEvent event )
            {
               textArea2.setText( textArea1.getSelectedText() );
            } // end method actionPerformed
         } // end anonymous inner class
      ); // end call to addActionListener

      textArea2 = new JTextArea( 10, 15 ); // create second textarea
      textArea2.setEditable( false ); // disable editing
      box.add( new JScrollPane( textArea2 ) ); // add scrollpane

      add( box ); // add box to frame
   } // end TextAreaFrame constructor
} // end class TextAreaFrame