Import Java.awt.*

Public class Figury extends Frame {
Figury() {//konstruktor

    setSize(500,600);
    SetVisible(true);
}

public void paint (Graphics cos) {
    cos.drawLine( 5, 10, 50, 100);
    cos.drawRect(10, 10, 20, 30);  //prostokąt
    cos.fillRoundRect(8, 90, 10, 10);  //wypełniony I zaokrąglony prostokąt
}

Public static void main (String args[]) {
new Figury();

}
}