appletpanel.java

it is Also Kmeans Algorithm in java.

/*
 * AppletPanel.java
 *
 * Created on 14 February 2008, 14:21
 */

package clusteranalysis;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
/**
 *
 * @author  hako
 */
public class AppletPanel extends javax.swing.JPanel {
    
    ArrayList<Point> points;
    KMeanCluster cluster;
    double[][] data;
    Color color1,color2,color3,color4,color5;
    int W,H;
    int groupCount=2;
    
    /** Creates new form AppletPanel */
    public AppletPanel() {
        initComponents();
        initMe();
    }
    
    public void initMe(){
        W=this.getWidth();
        H=this.getHeight();
        this.setLayout(null);
        this.setBackground(Color.BLACK);
        points=new ArrayList<Point>();
        color1=Color.RED;
        color2=Color.GREEN;
        color3=Color.BLUE;
        color4=Color.YELLOW;
        color5=Color.ORANGE;
    }
    
     public void paint(Graphics g){
        super.paint(g);
        Point p=null;
        if (points.size()>2){
            clusterIt();
        }
        
        for (int i=0;i<points.size();i++){
            p=points.get(i);
            g.setColor(Color.WHITE);
            try{
                if (cluster.indices[i]==0) g.setColor(this.color1);
                if (cluster.indices[i]==1) g.setColor(this.color2);
                if (cluster.indices[i]==2) g.setColor(this.color3);
                if (cluster.indices[i]==3) g.setColor(this.color4);
                if (cluster.indices[i]==4) g.setColor(this.color5);
            }catch (Exception e){
                
            }
            g.fillOval((int)p.getX(), (int)p.getY(), 5, 5);
            g.drawString(String.valueOf(i+1), (int)p.getX()-3, (int)p.getY()-3);
        }
    }
    
    public void clusterIt(){
        data=new double[points.size()][2];
        Point p;
        for (int i=0;i<points.size();i++){
            p=points.get(i);
            data[i][0]=p.getX();
            data[i][1]=p.getY();
        }
        cluster=new KMeanCluster(data, this.groupCount);
        cluster.doIt();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                formMouseClicked(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents

    private void formMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_formMouseClicked
        points.add(evt.getPoint());
        repaint();
    }//GEN-LAST:event_formMouseClicked
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
    
}