Cohen clipping on J2me

This is a cohen clipping algorithm implemented using java 2 microedition(j2me) for mobile application.
Any Points outside the window is not drawen.




java code

package hello;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


/**
 *
 * @author Mohammed

 */
public class cohen extends MIDlet implements CommandListener {
    Form form;
    TextField x1Field,y1Field,x2Field,y2Field;
    Command okCommand;
    myCanvas can;
    
    /** Creates a new instance of Line */
    public cohen() {
        okCommand=new Command("OK",Command.OK,0);
        form=new Form("Enter The Cordinates");
        x1Field=new TextField("X: ","",20,TextField.DECIMAL);
        y1Field=new TextField("Y: ","",20,TextField.DECIMAL);
        x2Field=new TextField("X: ","",20,TextField.DECIMAL);
        y2Field=new TextField("Y: ","",20,TextField.DECIMAL);

form.append(x1Field);
        form.append(y1Field);
        form.append(x2Field);
        form.append(y2Field);

form.addCommand(okCommand);
        form.setCommandListener(this);
    }
    
    protected void startApp() throws MIDletStateChangeException {
        Display display=Display.getDisplay(this);
        display.setCurrent(form);
    }
    
    protected void pauseApp() {
    }
    
    protected void destroyApp(boolean b) throws MIDletStateChangeException {
    }
    
    public void commandAction(Command command, Displayable displayable) {
        if(command.getCommandType()==Command.OK) {
            
            int x1=Integer.parseInt(x1Field.getString());
            int y1=Integer.parseInt(y1Field.getString());
            int x2=Integer.parseInt(x2Field.getString());
            int y2=Integer.parseInt(y2Field.getString());

can=new myCanvas(x1,y1,x2,y2);
            
            Display.getDisplay(this).setCurrent(can);
            can.repaint();
            
        }
    }
    
}
class myCanvas extends Canvas {
    public myCanvas(int x1,int y1,int x2,int y2) {
        this.x1=x1;
        this.y1=y1;
        this.x2=x2;
        this.y2=y2;

}
    protected void paint(Graphics g) {
        g.fillRect(0,0,300,300);
        g.setColor(200,23,43);
        
        int dy=y2-y1;
        int dx=x2-x1;
        System.out.println(" ");
        System.out.println(" "+dx);
        System.out.println(" "+dy);
        System.out.println(" ");
        m=((float)dy/dx);
        System.out.println(" "+m);
        b=-m*x2+y2;
        int x=0;
        int y=0;
        g.drawRect( min_x+115,150-max_y,200,200);
        if(x1max_x) {
            tag1[2]=1;//Right
        }
        
        if(x2max_x) {
            tag2[2]=1;//Right
        }
////////////////////////////////////////////////////////////////////
        if(y1max_y) {
            tag1[0]=1;//Top
        }
        
        if(y2max_y) {
            tag2[0]=1;//Top
        }
        System.out.println(" ");
        System.out.println("Point 1: ");
        for(int i=0;i<4;i++)
            System.out.print(tag1[i]);
        System.out.println(" ");
        System.out.println("Point 2: ");
        for(int i=0;i<4;i++)
            System.out.print(tag2[i]);
        System.out.println(" ");
        for(int i=0;i<4;i++) {
            
            And_tag[i]=(byte)(tag1[i]&tag2[i]);
            if(And_tag[i]==1) {
                System.out.println("Total Rejected (Outside the window !!!");
            }
            
        }
        for(int i=0;i<4;i++) {
            if(tag1[i]==1) {
                if(i<2) {

x1=move(i);
                    System.out.println(" x1 = "+ x1+"  "+i);
                    if(i==0)
                        y1=max_y;
                    else
                        y1=min_y;
                } else {

y1=move(i);
                    System.out.println("y1 = "+y1+"  "+i);
                    if(i==2)
                        x1=max_x;
                    else
                        x1=min_x;
                }
            }
        }
        for(int i=0;i<4;i++) {
            if(tag2[i]==1) {
                if(i<2) {

x2=move(i);
                    System.out.println("x2 = "+x2+"  "+i);
                    if(i==0)
                        y2=max_y;
                    else
                        y2=min_y;
                } else {

y2=move(i);
                    System.out.println("y2 = "+y2+"  "+i);
                    if(i==2)
                        x2=max_x;
                    else
                        x2=min_x;
                }
            }
        }
        g.drawLine(x1+115,150-y1,x2+115,150-y2);
    }
    public int move(int i) {
        System.out.println(" "+m);
        switch(i) {
            case 0:return ((int)((max_y-b)/m));
            case 1:return ((int)((min_y-b)/m));
            case 2:return (int)(max_x*m+b);
            case 3:return (int)(min_x*m+b);
            
        }
        return -1;
    }
    int min_x=-100;
    int max_x=100;
    int min_y=-100;
    int max_y=100;
    byte[] tag1=new byte[4];
    byte[] tag2=new byte[4];
    byte[] And_tag=new byte[4];
    int ones1;
    int ones2;
    float m;
    float b;
    int x1=0;
    int y1=0;
    int x2=0;
    int y2=0;

}