RAdiobUtton menuitem JMenu colorHelpSubMenu= new JMenu("Color") helpMenu. add(color HelpSubMenu Radio Menuitem jrbmiBlue, jrbmi Yellow, jrbmired color Help SubMenu. addgrbmiBlue= new JRadioButton Menultem ("Blue"D)) colorHelpSubMenu. addgjrbmi Yellow= new JRadioButtonMenultem("Yellow")) colorHelpSubMenu. addgjrbmiRed-= new JRadioButton Menuitem("Red")) Button Group btg=new Button Groupo btg. addgrbmiBlue) btg. addgrbmi Yellow) btg. addgjrbmiRed)JRadioButtonMenuItem JMenu colorHelpSubMenu = new JMenu("Color"); helpMenu.add(colorHelpSubMenu); JRadioButtonMenuItem jrbmiBlue, jrbmiYellow, jrbmiRed; colorHelpSubMenu.add(jrbmiBlue = new JRadioButtonMenuItem("Blue")); colorHelpSubMenu.add(jrbmiYellow = new JRadioButtonMenuItem("Yellow")); colorHelpSubMenu.add(jrbmiRed = new JRadioButtonMenuItem("Red")); ButtonGroup btg = new ButtonGroup(); btg.add(jrbmiBlue); btg.add(jrbmiYellow); btg.add(jrbmiRed);