*********************
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();
}
}
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