Java实例 (续) import javax.swing.JOptionPane; public class Show{ public static void main(String args[]){ Point point=new Point(7,11); Circle circle=new Circle(3.5,22,8); Cylinder cylinder=new Cylinder(10,3.3,10,10); Shape arrayofShapes[]=new Shape[3]; arrayofShapes[0]-point; arrayofShapes[1]=circle; arrayofShapes[2]=cylinder; String output=point.getName()+":"+point.tostring()+"\n"+ circle.getName ()+""+circle.tostring ()+"\n"+ cylinder.getName ()+""+cylinder.tostring () JOptionPane.showMessageDialog(null,output,"Demonstrating Polymorphism",JOptionPane.INFORMATION MESSAGE ) System.exit(0 )Java实例——（续） import javax.swing.JOptionPane; public class Show{ public static void main(String args[]){ Point point=new Point(7,11); Circle circle=new Circle(3.5,22,8); Cylinder cylinder=new Cylinder(10,3.3,10,10); Shape arrayOfShapes[]=new Shape[3]; arrayOfShapes[0]=point; arrayOfShapes[1]=circle; arrayOfShapes[2]=cylinder; String output=point.getName()+":"+point.toString()+"\n"+ circle.getName()+":"+circle.toString()+"\n"+ cylinder.getName()+":"+cylinder.toString(); JOptionPane.showMessageDialog(null,output,"Demonstrating Polymorphism",JOptionPane.INFORMATION_MESSAGE ); System.exit( 0 ); } }