A good answer might be:

The blanks a filled in below. Each button must have a unique command, but it could be something other than the ones here.

Now we need to add some logic so that a different action is performed for each button. An ActionEvent object will have the command inside of it. To get the command, use the event's getActionCommand() method. For example, if evt refers to an ActionEvent object, then evt.getActionCommand() is the command.

Since the command is a String, you can use its equals( String ) method to compare it to another string.

import java.awt.*; import java.awt.event.*; public class TwoButtons extends Frame implements ActionListener { Button redButton = new Button("Red"); Button grnButton = new Button("Green"); TwoButtons() // constructor for TwoButtons { setLayout( new FlowLayout() ); // choose the layout manager redButton.addActionListener( this ); // register the buttonDemo object grnButton.addActionListener( this ); // with both Buttons. redButton.setActionCommand( "red" ); grnButton.setActionCommand( "green" ); add( redButton ); add( grnButton ); } public void actionPerformed( ActionEvent evt) { if ( evt.getActionCommand().equals( ________ ) ) setBackground( ____________ ); else setBackground( Color.green ); repaint(); // ask the system to paint the screen. } . . . . . . . . }

QUESTION 14:

Fill in the blanks in the program.