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BorderLayout (LayoutManagers)

Java LayoutManagers

The LayoutManagers are used to arrange components in a particular manner. The Java LayoutManagers facilitates us to control the positioning and size of the components in GUI forms. LayoutManager is an interface that is implemented by all the classes of layout managers. There are the following classes that represent the layout managers:

  1. java.awt.BorderLayout
  2. java.awt.FlowLayout
  3. java.awt.GridLayout
  4. java.awt.CardLayout
  5. java.awt.GridBagLayout
  6. javax.swing.BoxLayout
  7. javax.swing.GroupLayout
  8. javax.swing.ScrollPaneLayout
  9. javax.swing.SpringLayout etc.

Java BorderLayout

The BorderLayout is used to arrange the components in five regions: north, south, east, west, and center. Each region (area) may contain one component only. It is the default layout of a frame or window. The BorderLayout provides five constants for each region:

  1. public static final int NORTH
  2. public static final int SOUTH
  3. public static final int EAST
  4. public static final int WEST
  5. public static final int CENTER

Constructors of BorderLayout class:

  • BorderLayout(): creates a border layout but with no gaps between the components.
  • BorderLayout(int hgap, int vgap): creates a border layout with the given horizontal and vertical gaps between the components.

Example of BorderLayout class: Using BorderLayout() constructor



BorderLayout class

Example of BorderLayout class: Using BorderLayout(int hgap, int vgap) constructor

The following example inserts horizontal and vertical gaps between buttons using the parameterized constructor BorderLayout(int hgap, int gap)



BorderLayout class

Java BorderLayout: Without Specifying Region

The add() method of the JFrame class can work even when we do not specify the region. In such a case, only the latest component added is shown in the frame, and all the components added previously get discarded. The latest component covers the whole area. The following example shows the same.



BorderLayout class
Next TopicGridLayout

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