/./././././././././.
// Give Ship3 a constructor to let the instance variables
// be specified when the object is created.
/./././././././././
class Ship3 {
public double x, y, speed, direction;
public String name;
public Ship3(double x, double y, double speed,
double direction, String name) {
this.x = x; // "this" differentiates instance vars
this.y = y; // from local vars.
this.speed = speed;
this.direction = direction;
this.name = name;
}
private double degreesToRadians(double degrees) {
return(degrees * Math.PI / 180.0);
}
public void move() {
double angle = degreesToRadians(direction);
x = x + speed * Math.cos(angle);
y = y + speed * Math.sin(angle);
}
public void printLocation() {
System.out.println(name + " is at " +
"(" + x + "," + y + ").");
}
}
public class Test3 {
public static void main(String[] args) {
Ship3 s1 = new Ship3(0.0, 0.0, 1.0, 0.0, "Ship1");
Ship3 s2 = new Ship3(0.0, 0.0, 2.0, 135.0, "Ship2");
s1.move();
s2.move();
s1.printLocation();
s2.printLocation();
}
}