import java.awt.*;
                class A
                {
                
                A() {
                
                Frame f = new Frame("Frame");
                
                Checkbox checkbox1 = new Checkbox("Male");
                
                Checkbox checkbox2 = new Checkbox("Female", true);
                
                f.add(checkbox1);
                f.add(checkbox2);
                
                f.setSize(400,400);
                f.setLayout(new FlowLayout());
                f.setVisible(true);
                }
                
                public static void main (String args[])
                {
                new A();
                }
                }