Answer:

It is one of the methods that each JButton object has. (JButtons are objects, so they have identity, state, and behavior as do all objects.)

Setting `JButton` Commands

Here is the program so far, but with some new blanks.

public class TwoButtons extends JFrame implements ActionListener
{
  JButton redButton ;
  JButton grnButton ;

  // constructor for TwoButtons
  public TwoButtons()                           
  {
    super( title );
    
    redButton = new JButton("Red");
    grnButton = new JButton("Green");
    
    .setActionCommand(  );    
    .setActionCommand(  );    
    
    // register the buttonDemo frame (this)
    // as the listener for both Buttons.    
    redButton.addActionListener( this );
    grnButton.addActionListener( this );

    setLayout( new FlowLayout() ); 
    add( redButton );                      
    add( grnButton );
    setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );   
  }

  . . . .
}

QUESTION 11:

Fill in the blanks.

Each button needs to have a command set for it.
A command is a String.
The commands must be unique.

Answer:

Setting JButton Commands

QUESTION 11:

Setting `JButton` Commands