import javax.microedition.lcdui.*;

public class App extends Canvas implements Runnable{

public Font font;
public String str;
public String[] p;
public Parsing parsing;
int height;
int width;
int id;
int fh;

Boolean up;
Boolean down;


public App(String s){

super();

str = s;

setFullScreenMode(false);

parsing = new Parsing();

p = parsing.splitString(str,"\n");

Thread thread = new Thread(this);

font = Font.getFont(0,0,Font.SIZE_SMALL);

fh = font.getHeight();

height = getHeight();
width = getWidth();

id = 0;

up = false;
down = false;

thread.start();
}


public void run(){

while(true){


if (up == true) up();
if (down == true) down();

if (down == false) down = false;
if (up == false) up = false;

try{

Thread.sleep(20);

} catch (Exception e){}

}

}


public void paint(Graphics g){
g.setFont(Font.getFont(0,0,Font.SIZE_SMALL));
g.setColor(255,255,255);
g.fillRect(0,0,width,height);

for (int i=0; i< p.length; i++){

String in = Integer.toString(i);

g.setColor(0,0,0);
g.drawString(in + " "+p[i], 0, id + i* fh,20);

}
repaint();
}

public void keyPressed(int key){

if (key == Canvas.KEY_NUM2) up= true;

if (key == Canvas.KEY_NUM8) down = true;

}

public void keyRealised(int key){

if (key == Canvas.KEY_NUM2) up = false;

if (key == Canvas.KEY_NUM8) down = false;

}


public void down(){

if (fh * p.length> height){

id = id - fh;

if (height - id> p.length* fh) id = height - p.length* fh;


}
}

public void up(){

if (p.length* fh> height){

id = id + fh;

if (id > 0) id = 0;

   }
}

/* end */
}