Control Fundamentals

Controls are components that allow a user to interact with your application in various ways—for example, a commonly used control is the push button.

1.     A layout manager automatically positions components within a container. Thus, the appearance of a window is determined by a combination of the controls that it contains and the layout manager used to position them.In addition to the controls, a frame window can also include a standard-style menu bar. 

2.     Each entry in a menu bar activates a drop-down menu of options from which the user can choose. A menu bar is always positioned at the top of a window. Although different in appearance, menu bars are handled in much the same way as are the other controls. While it is possible to manually position components within a window, doing so is quite tedious. The layout manager automates this task.

Control Fundamentals
The AWT supports the following types of controls:
■ Labels
■ Push buttons
■ Check boxes
■ Choice lists
■ Lists
■ Scroll bars
■ Text editing

·        They are the subclasses of ‘Component’

How to add or remove controls?

• Syntax:-
• Component add(Component obj)

• We can also remove our control from window by calling remove() method.
  Syntax:-

Void remove(Component obj)

• And also controls can be removed by calling removeAll(