d4_dependency

public class Circle {
    private Integer radius;
    public void draw(){
        System.out.println("画圆半径："+this.radius+"的圆");
    }
}

public class People {
    private String name;
    private Integer age;
    public void drawCircle(){
        Circle circle = new Circle();
        System.out.println("人画圆");
        circle.draw();
    }
}