Zasto stampa dva puta

Zasto stampa dva puta "buljaka"?


import java.awt.*;

public class Grafik extends Frame {

Platno platno;


public Grafik() {
super("Grafik");
setSize(350,250);
add(platno=new Platno());
}


public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Grafik().setVisible(true);
}
});
}
}




import java.awt.*;

public class Platno extends Canvas {


public void paint(Graphics g){
System.out.println("buljaka");


}

}