concretecircle.java

来自「有关java学习技巧的课件」· Java 代码 · 共 11 行

public class ConcreteCircle extends AbstractCircle {
    public ConcreteCircle() {}

    public ConcreteCircle(double radius) {
        this.radius = radius;
    }

    public void render() {
        System.out.printf("画一个半径 %f 的实心圆\n", getRadius());
    }
}