import java.applet.Applet;
import java.awt.*;
public class rj2 extends Applet{
Image pilt, sahver;
Graphics piltg, sahverg;
int koht=0, aste=0;
int arv=36, reanr=1, juur=1, vahe, vahearv ;
FontMetrics fm;

Button oknupp=new Button(" *  * OK *  * ");
TextField tf=new TextField(5), tf2=new TextField(5);
Panel p=new Panel(), p2=new Panel(), p3=new Panel(), p4=new Panel();
Panel pa=new Panel(), lp= new Panel();
Label lb=new Label("Enter number:");

public void init(){
 this.setBackground(Color.white);
 vahearv=arv;
 pilt=createImage(300, 400);
 piltg=pilt.getGraphics();
 sahver=createImage(300, 400);
 sahverg=sahver.getGraphics();
 fm=getFontMetrics(getFont());
 p.setLayout(new BorderLayout());
 pa.setLayout(new BorderLayout());
 pa.add("West", tf2);
 pa.add("East", oknupp);
 lp.add(lb);
 p.add("North", lb);
 p.add("South", pa);
 p4.add(p);
 setLayout(new BorderLayout());
 add("South", p);
 p2.setLayout(new BorderLayout());
 p2.add("North", tf);
 p3.add(p2);
 add("East", p3);
 tf2.setText("9");
 tf2.requestFocus();
 tf2.selectAll();
 tf2.setEditable(true);
}

void algvaartustus(){
   tf2.setText("25"); tf2.selectAll(); reanr=1; tf2.setEditable(true); juur=1;
   tf2.requestFocus();
   lb.setText("Enter number:");

}

void joonista2(){
int lahutus=2*juur-1;
if(vahearv-lahutus>0){
 tf.setText(Integer.toString(juur));
 piltg.drawString(Integer.toString(vahearv), 50-fm.stringWidth(Integer.toString(vahearv)), reanr++*10);
 piltg.drawString(Integer.toString(lahutus), 50-fm.stringWidth(Integer.toString(lahutus)), reanr++*10);
 piltg.drawLine(20, reanr*10-8, 50, reanr*10-8);
 vahearv-=lahutus;
 reanr++;
 juur++;
}

else if(vahearv-lahutus==0){
 piltg.drawString(Integer.toString(vahearv), 50-fm.stringWidth(Integer.toString(vahearv)), reanr++*10);
 piltg.drawString(Integer.toString(lahutus), 50-fm.stringWidth(Integer.toString(lahutus)), reanr++*10);
 piltg.drawLine(20, reanr*10-5, 50, reanr++*10-5);
 piltg.setColor(Color.red);
 piltg.drawString(Integer.toString(0), 50-fm.stringWidth(Integer.toString(0)), reanr++*10);
 piltg.setColor(Color.black);
 piltg.drawString("Square root of "+arv+"="+juur, 20, reanr++*10);
 oknupp.setLabel("Complete");
 algvaartustus();
}

else if(vahearv-lahutus<0){
 piltg.drawString(Integer.toString(vahearv), 50-fm.stringWidth(Integer.toString(vahearv)), reanr++*10);
 piltg.drawString(Integer.toString(lahutus), 50-fm.stringWidth(Integer.toString(lahutus)), reanr*10);
 piltg.setColor(Color.red);
 piltg.drawString(Integer.toString(vahearv)+"-"+Integer.toString(lahutus)+"<0", 60, reanr++*10);
 piltg.setColor(Color.black);
 piltg.drawLine(20, reanr*10-8, 50, reanr++*10-8);
 piltg.drawString("Integer part of square root of "+arv+"="+(juur-1), 20, reanr++*10);
 oknupp.setLabel("Finished");
 algvaartustus();
}

if (reanr>30){sahverg.drawImage(pilt, 0, 0, null);
    piltg.setColor(Color.white);
    piltg.fillRect(0, 0, 200, 400);
    piltg.setColor(Color.black);
    piltg.drawImage(sahver, 0, -30, null);
    reanr-=3;
     }
 repaint();
}


public void paint(Graphics g){
 g.drawImage(pilt, 0, 0, this);
}

public boolean action(Event e, Object arg){
 if(e.target.equals(oknupp)){

 if(reanr==1){arv=vahearv=Integer.parseInt(tf2.getText());
 tf2.setEditable(false);oknupp.setLabel("Push");
 lb.setText("Number:");
    piltg.setColor(Color.white);
    piltg.fillRect(0, 0, 300, 400);
    piltg.setColor(Color.black);
 }
 joonista2();
 }
 return super.action(e, arg);
}
}