// Fig. 9.14: CircleTest4.java // Testing class Circle4. import java.text.DecimalFormat; import javax.swing.JOptionPane; public class CircleTest4 { public static void main( String[] args ) { // instantiate Circle object Circle4 circle = new Circle4( 37, 43, 2.5 ); // get Circle4's initial x-y coordinates and radius String output = "X coordinate is " + circle.getX() + "\nY coordinate is " + circle.getY() + "\nRadius is " + circle.getRadius(); circle.setX( 35 ); // set new x-coordinate circle.setY( 20 ); // set new y-coordinate circle.setRadius( 4.25 ); // set new radius // get String representation of new circle value output += "\n\nThe new location and radius of circle are\n" + circle.toString(); // format floating-point values with 2 digits of precision DecimalFormat twoDigits = new DecimalFormat( "0.00" ); // get Circle's diameter output += "\nDiameter is " + twoDigits.format( circle.getDiameter() ); // get Circle's circumference output += "\nCircumference is " + twoDigits.format( circle.getCircumference() ); // get Circle's area output += "\nArea is " + twoDigits.format( circle.getArea() ); JOptionPane.showMessageDialog( null, output ); // display output System.exit( 0 ); } // end main } // end class CircleTest4