A Tag cloud is a visual representation of text data. In this tags are words, where the importance is highlighted using colour or font size. This is very popular now to analyse contents of websites. This helps in quickly perceiving the most important words. The importance is calculated by counting the number of occurance. Thus based on occurance, weightage is given to each word(tag). After analysing the whole text, it is displayed based on it weightage. Thus tag cloud will be generated. open cloud is a java library for generating tag clouds. Here I used Open cloud library for the generation of Tag cloud. Normally we need a webserver for getting a good UI of the TagCloud, here we are displaying the cloud using Swing. This is a sample program for the generation of a simple tag Cloud. For this download the Open Cloud Library.

package tagcloud;

import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import org.mcavallo.opencloud.Cloud;
import org.mcavallo.opencloud.Tag;

public class TestOpenCloud {

private static final String[] WORDS = { "amal", "india", "hello", "amal", "birthday", "amal", "hello", "california", "america", "software",
 "cat", "bike", "car", "christmas", "city", "zoo", "amal", "asia", "family", "festival", "flower", "flowers", "food",
 "little", "friends", "fun", "amal", "outing", "india", "weekend", "india", "software", "me", "music", "music", "music",
 "new", "love", "night", "nikon", "morning", "love", "park", "software", "people", "portrait", "flower", "sky", "travelling",
 "spain", "summer", "sunset", "india", "city", "india", "amal", "uk", "usa", "", "water", "wedding","cool","happy","friends","best","trust","good",
 "enjoy","cry","laugh"};

protected void initUI() {
 JFrame frame = new JFrame(TestOpenCloud.class.getSimpleName());
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 JPanel panel = new JPanel();
 Cloud cloud = new Cloud();
 Random random = new Random();
 for (String s : WORDS) {
 for (int i = random.nextInt(50); i > 0; i--) {
 cloud.addTag(s);
 }
 }
 for (Tag tag : cloud.tags()) {
 final JLabel label = new JLabel(tag.getName());
 label.setOpaque(false);
 label.setFont(label.getFont().deriveFont((float) tag.getWeight() * 10));
 panel.add(label);
 }
 frame.add(panel);
 frame.setSize(800, 600);
 frame.setVisible(true);
 }

public static void main(String[] args) {
 SwingUtilities.invokeLater(new Runnable() {
 @Override
 public void run() {
 new TestOpenCloud().initUI();
 }
 });
 }

}
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