SWING - GridLayout Class
Introduction
The class GridLayout arranges components in a rectangular grid.
Class declaration
Following is the declaration for java.awt.GridLayout class:
public class GridLayout extends Object implements LayoutManager, Serializable
Class constructors
S.N. | Constructor & Description |
---|---|
1 | GridLayout() Creates a grid layout with a default of one column per component, in a single row. |
2 | GridLayout(int rows, int cols) Creates a grid layout with the specified number of rows and columns. |
3 | GridLayout(int rows, int cols, int hgap, int vgap) Creates a grid layout with the specified number of rows and columns. |
Class methods
S.N. | Method & Description |
---|---|
1 | void addLayoutComponent(String name, Component comp) Adds the specified component with the specified name to the layout. |
2 | int getColumns() Gets the number of columns in this layout. |
3 | int getHgap() Gets the horizontal gap between components. |
4 | int getRows() Gets the number of rows in this layout. |
5 | int getVgap() Gets the vertical gap between components. |
6 | void layoutContainer(Container parent) Lays out the specified container using this layout. |
7 | Dimension minimumLayoutSize(Container parent) Determines the minimum size of the container argument using this grid layout. |
8 | Dimension preferredLayoutSize(Container parent) Determines the preferred size of the container argument using this grid layout. |
9 | void removeLayoutComponent(Component comp) Removes the specified component from the layout. |
10 | void setColumns(int cols) Sets the number of columns in this layout to the specified value. |
11 | void setHgap(int hgap) Sets the horizontal gap between components to the specified value. |
12 | void setRows(int rows) Sets the number of rows in this layout to the specified value. |
13 | void setVgap(int vgap) Sets the vertical gap between components to the specified value. |
14 | String toString() Returns the string representation of this grid layout's values. |
Methods inherited
This class inherits methods from the following classes:
java.lang.Object
GridLayout Example
Create the following java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >
SwingLayoutDemo.javapackage com.tutorialspoint.gui; import javax.swing.*; public class SwingLayoutDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; private JLabel msglabel; public SwingLayoutDemo(){ prepareGUI(); } public static void main(String[] args){ SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo(); swingLayoutDemo.showGridLayoutDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java SWING Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); headerLabel = new JLabel("",JLabel.CENTER ); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showGridLayoutDemo(){ headerLabel.setText("Layout in action: GridLayout"); JPanel panel = new JPanel(); panel.setBackground(Color.darkGray); panel.setSize(300,300); GridLayout layout = new GridLayout(0,3); layout.setHgap(10); layout.setVgap(10); panel.setLayout(layout); panel.add(new JButton("Button 1")); panel.add(new JButton("Button 2")); panel.add(new JButton("Button 3")); panel.add(new JButton("Button 4")); panel.add(new JButton("Button 5")); controlPanel.add(panel); mainFrame.setVisible(true); } }
Compile the program using command prompt. Go to D:/ > SWING and type the following command.
D:\SWING>javac com\tutorialspoint\gui\SwingLayoutDemo.java
If no error comes that means compilation is successful. Run the program using following command.
D:\SWING>java com.tutorialspoint.gui.SwingLayoutDemo
Verify the following output
![SWING GridLayout](/swing/images/swing_gridlayout.jpg)