Following is the declaration for java.awt.BorderLayout class
public class BorderLayout
extends Object
implements LayoutManager2, Serializable
Field
Following are the fields for java.awt.BorderLayout class −
static String AFTER_LAST_LINE − Synonym for PAGE_END.
static String AFTER_LINE_ENDS − Synonym for LINE_END.
static String BEFORE_FIRST_LINE − Synonym for PAGE_START.
static String BEFORE_LINE_BEGINS − Synonym for LINE_START.
static String CENTER − The center layout constraint (middle of the container).
static String EAST − The east layout constraint (right side of the container).
static String LINE_END − The component goes at the end of the line direction for the layout.
static String LINE_START − The component goes at the beginning of the line direction for the layout.
static String NORTH − The north layout constraint (top of the container).
static String PAGE_END − The component comes after the last line of the layout’s content.
static String PAGE_START − The component comes before the first line of the layout’s content.
static String SOUTH − The south layout constraint (bottom of the container).
static String WEST − The west layout constraint (left side of the container).
# Constructors
BorderLayout() | Constructs a new border layout with no gaps between the components. |
BorderLayout(int hgap, int vgap) | Constructs a border layout with the specified gaps between the components. |
# Methods
void addLayoutComponent(Component comp, Object constraints) | Adds the specified component to the layout, using the specified constraint object. |
void addLayoutComponent(String name, Component comp) | If the layout manager uses a per-component string, adds the component comp to the layout, associating it with the string specified by name. |
int getHgap() | Returns the horizontal gap between the components. |
float getLayoutAlignmentX(Container parent) | Returns the alignment along the x-axis. |
float getLayoutAlignmentY(Container parent) | Returns the alignment along the y-axis. |
int getVgap() | Returns the vertical gap between the components. |
void invalidateLayout(Container target) | Invalidates the layout, indicating that if the layout manager has cached information it should be discarded. |
void layoutContainer(Container target) | Lays out the container argument using this border layout. |
Dimension maximumLayoutSize(Container target) | Returns the maximum dimensions for this layout given the components in the specified target container. |
Dimension minimumLayoutSize(Container target) | Determines the minimum size of the target container using this layout manager. |
Dimension preferredLayoutSize(Container target) | Determines the preferred size of the target container using this layout manager, based on the components in the container. |
void removeLayoutComponent(Component comp) | Removes the specified component from this border layout. |
void setHgap(int hgap) | Sets the horizontal gap between the components. |
void setVgap(int vgap) | Sets the vertical gap between the components. |
String toString() | Returns a string representation of the state of this border layout. |
# Methods Inherited
- java.lang.Object
# BorderLayout Example
SwingLayoutDemo.java
package com.simplecheatsheet.gui;
import java.awt.*;
import java.awt.event.*;
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.showBorderLayoutDemo();
}
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 showBorderLayoutDemo(){
headerLabel.setText("Layout in action: BorderLayout");
JPanel panel = new JPanel();
panel.setBackground(Color.darkGray);
panel.setSize(300,300);
BorderLayout layout = new BorderLayout();
layout.setHgap(10);
layout.setVgap(10);
panel.setLayout(layout);
panel.add(new JButton("Center"),BorderLayout.CENTER);
panel.add(new JButton("Line Start"),BorderLayout.LINE_START);
panel.add(new JButton("Line End"),BorderLayout.LINE_END);
panel.add(new JButton("East"),BorderLayout.EAST);
panel.add(new JButton("West"),BorderLayout.WEST);
panel.add(new JButton("North"),BorderLayout.NORTH);
panel.add(new JButton("South"),BorderLayout.SOUTH);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
}