square.java

来自「《Java编程思想》第四版源代码」· Java 代码 · 共 9 行

//: polymorphism/shape/Square.java
package polymorphism.shape;
import static net.mindview.util.Print.*;

public class Square extends Shape {
  public void draw() { print("Square.draw()"); }
  public void erase() { print("Square.erase()"); }
} ///:~