castdemo.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 16 行

  // CastDemo.java
import static java.lang.System.*;

public class CastDemo{
  public static void main(String args[]){
    Cylinder cylin = new Cylinder();
    Circle circle = cylin;
    out.println(circle);
    out.println(cylin);
    out.println(circle.area());
    //out.println(circle.volume());
    cylin = (Cylinder)circle;
    out.println(cylin.volume());
  }
}