Register a listener object on the button

Listing 5 registers an ActionListener object

You have seen code like this in numerous previous lectures.

Therefore, a detailed explanation of Listing 5 should not be required here.

Listing 5. Register a listener object on the button.
 
    setColorButton.addActionListener(
      new ActionListener(){
        public void actionPerformed(ActionEvent e){
          //Set the color to green.
          redInt = 0;
          greenInt = 255;
          blueInt = 0;
          
          //Show the color values in the text fields.
          redField.setText("" + redInt);
          greenField.setText("" + greenInt);
          blueField.setText("" + blueInt);

        }//end action performed
      }//end new ActionListener
    );//end addActionListener
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