chapter14n0.java

JAVA源代码程序aashjkjhkjhkjhjkhkj

/**
 * program to test the "Solid" abstract class
 */

public class Chapter14n0
    {
    public static void main(String[] args)
	{
	Solid aSolid ;		// valid declaration.  Note we haven't
				// used a constructor

	Sphere aSphere = new Sphere(4.0) ;
	aSolid = aSphere ;
	System.out.println(aSolid.volume()) ;

	System.out.println() ;

	Solid[] collection = new Solid[4] ;

	Sphere s1 = new Sphere(4) ;
	collection[0] = s1 ;

	Cuboid c1 = new Cuboid(2, 3, 4) ;
	collection[1] = c1 ;

	Cylinder cyl = new Cylinder(4, 2) ;
	collection[2] = cyl ;

	Sphere s2 = new Sphere(3) ;
	collection[3] = s2 ;

	double totalVolume = 0.0 ;
	for (int i = 0 ; i < 4 ; i++)
	    {
	    totalVolume = totalVolume + collection[i].volume() ;
	    }
	System.out.println("total volume = " + totalVolume) ;
	} // end of main method
    } // end of class Chapter14n0