Creating circle in java

interface NewShape
{
//void draw();
}

interface Circle extends NewShape
{
void getRadius();
int radius=10;
}

class NewCircle implements Circle
{
public void getRadius()
{
System.out.println(radius);
}
}
class ExtendInterface extends NewCircle
{
public static void main(String args[])
{
Circle nc=new NewCircle();
nc.getRadius();
}
}