... fourth button is a push button that the user can click to clear the drawing Tool bars are easy to use You just have to create the JToolBar object, add it to a container, and add some buttons and ... BorderLayout.CENTER); JToolBar toolbar = new JToolBar(); add(toolbar, BorderLayout.NORTH); ButtonGroup group = new ButtonGroup(); CHAPTER 13 ADVANCED GUI PROGRAMMING 683 toolbar.add( makeColorRadioButton(Color.RED,group,true) ... 679 To use a group of radio buttons, you must create a JRadioButton object for each button in the group, and you must create one object of type ButtonGroup to organize the individual buttons into...