/** Taken from Core Web Programming from 
 *  Prentice Hall and Sun Microsystems Press,
 *  http://www.corewebprogramming.com/.
 *  © 2001 Marty Hall and Larry Brown;
 *  may be freely used or adapted.
 */

class Ship4 {
  public double x=0.0, y=0.0, speed=1.0, direction=0.0;
  public String name;

  // This constructor takes the parameters explicitly.
  
  public Ship4(double x, double y, double speed,
               double direction, String name) {
    this.x = x;
    this.y = y;
    this.speed = speed;
    this.direction = direction;
    this.name = name;
  }

  // This constructor requires a name but lets you accept
  // the default values for x, y, speed, and direction.

  public Ship4(String name) {
    this.name = name;
  }
  
  private double degreesToRadians(double degrees) {
    return(degrees * Math.PI / 180.0);
  }

  // Move one step.
  
  public void move() {
    move(1);
  }

  // Move N steps.

 public void move(int steps) {
    double angle = degreesToRadians(direction);
    x = x + (double)steps * speed * Math.cos(angle);
    y = y + (double)steps * speed * Math.sin(angle);
  }

  public void printLocation() {
    System.out.println(name + " is at (" + x + "," + y + ").");
  }
}

public class Test4 {
  public static void main(String[] args) {
    Ship4 s1 = new Ship4("Ship1"); 
    Ship4 s2 = new Ship4(0.0, 0.0, 2.0, 135.0, "Ship2");
    s1.move();
    s2.move(3);
    s1.printLocation();
    s2.printLocation();
  }
}