circletest2.java

《Java面向对象程序设计》例子源代码.轻松学习书本.

//CircleTest2.java
import java.text.DecimalFormat;
import javax.swing.JOptionPane;
public class CircleTest2 {
   public static void main( String[] args ) {
      Circle2 circle = new Circle2( 37, 43, 2.5 ); 
      //使用继承自Point2的方法getX和getY
      String output = "X coordinate is " + circle.getX() +
         "\nY coordinate is " + circle.getY() +
         "\nRadius is " + circle.getRadius();
      circle.setX( 35 );   	//使用继承自Point2的方法setX      
      circle.setY( 20 );   	//使用继承自Point2的方法setY   
      circle.setRadius( 4.25 );  
      output += "\n\nThe new location and radius of circle are\n" +
         circle.toString();
      DecimalFormat twoDigits = new DecimalFormat( "0.00" );
      output += "\nDiameter is " + 
         twoDigits.format( circle.getDiameter() );
      output += "\nCircumference is " +
         twoDigits.format( circle.getCircumference() );
      output += "\nArea is " + twoDigits.format( circle.getArea() );
      JOptionPane.showMessageDialog( null, output ); 
      System.exit( 0 );
   } 
}