The layout manager determines how portions of the screen will be sectioned and how components (Label,TextField,Buttons) within that panel will be placed. A layout manager governs the position(east,west,north,south,center), shape and size(using coordinates )of components in a container.
HTML stands for HYPERTEXT MARKUP LANGUAGE which is a technique to write documents, describing the general structure of the contents inside the documents. In HTML we use tags which determines the way, the browser would display the text.The text is written in the tags.
We can create multiple windows(more than one windows) in JInternal Frame class.This is also known as MDI(Multiple document interface).The JInternal Frame is same as Jframe class. We can add all the components (JButton,JTextField,JLabel etc)in all the internal frames.
Table is the Combination of rows and columns. With the help of Table we can display the data. A software application with a colorless screen interface would be dull and lifeless. Adding colour to it more attractive and captivating. The java.awt.Color class is used to add color to the applications and applets.
JButton Group component is used to manage the Buttons. By using JButtonGroup we can select only one option at a time.Controls are components like Buttons, textboxes that can be added to container like frames,panels etc.