Composite Layout Example
A user interface of any complexity will use a variety of layout managers to achieve user-friendliness. This layout example uses BorderLayout of the container cp, and GridLayout for each of the three panels.
// BorderLayout and GridLayout Example
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
class BorderLayoutExample2 {
public static void main(String[] args) {
JPanel p0 = new JPanel(new GridLayout(0,1));
JPanel p1 = new JPanel(new GridLayout(0,1));
JPanel p2 = new JPanel(new GridLayout(0,1));
p0.setBorder(new TitledBorder(new LineBorder(Color.orange,5),"Cereals"));
p1.setBorder(new TitledBorder(new LineBorder(Color.pink,5),"Breads"));
p2.setBorder(new TitledBorder(new LineBorder(Color.cyan,5),"Cakes"));
JFrame frame = new JFrame("Confectionary");
Container cp = frame.getContentPane();
cp.add(new JLabel("Select Your Preferences",JLabel.CENTER),BorderLayout.NORTH);
cp.add(p0,BorderLayout.WEST);
cp.add(p1,BorderLayout.CENTER);
cp.add(p2,BorderLayout.EAST);
String[] cereals = new String[]{
"Coco Pops","Muesli","Cheerios","Ready Brek",
"Frosties","Sugar Puffs","Shreddies"
};
for(int i=0;i<cereals.length;++i) p0.add(new JCheckBox(cereals[i]));
String[] breads = new String[]{
"Pitta","Naan","Baguette","Chapati","Focaccia",
"Granary","Panini","Ciabatta"
};
for(int i=0;i<breads.length;++i) p1.add(new JCheckBox(breads[i]));
String[] cakes = new String[]{
"Baklava","Strudel","Macaroon","Doughnut","Profiterole"
};
for(int i=0;i<cakes.length;++i) p2.add(new JCheckBox(cakes[i]));
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}