little help

<syntaxhighlight>Compiling...
Arg.java:32: package Point2D does not exist
public Point2D.Double guessPosition(long when) {
              ^
Arg.java:36: cannot find symbol
symbol  : variable time
location: class argeaer.Arg
    double diff = when - time;
                         ^
Arg.java:40: cannot find symbol
symbol  : variable changehead
location: class argeaer.Arg
    if (Math.abs(changehead) > 0.00001) {
                 ^
Arg.java:41: cannot find symbol
symbol  : variable speed
location: class argeaer.Arg
        double radius = speed/changehead;
                        ^
Arg.java:41: cannot find symbol
symbol  : variable changehead
location: class argeaer.Arg
        double radius = speed/changehead;
                              ^
Arg.java:42: cannot find symbol
symbol  : variable changehead
location: class argeaer.Arg
        double tothead = diff * changehead;
                                ^
Arg.java:43: cannot find symbol
symbol  : variable y
location: class argeaer.Arg
        newY = y + (Math.sin(heading + tothead) * radius) - 
               ^
Arg.java:43: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
        newY = y + (Math.sin(heading + tothead) * radius) - 
                             ^
Arg.java:43: sin(double) in java.lang.Math cannot be applied to (<nulltype>)
        newY = y + (Math.sin(heading + tothead) * radius) - 
                        ^
Arg.java:44: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
                      (Math.sin(heading) * radius);
                                ^
Arg.java:43: operator - cannot be applied to <nulltype>,double
        newY = y + (Math.sin(heading + tothead) * radius) - 
                                                          ^
Arg.java:45: cannot find symbol
symbol  : variable x
location: class argeaer.Arg
        newX = x + (Math.cos(heading) * radius) - 
               ^
Arg.java:45: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
        newX = x + (Math.cos(heading) * radius) - 
                             ^
Arg.java:46: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
                      (Math.cos(heading + tothead) * radius);
                                ^
Arg.java:46: cos(double) in java.lang.Math cannot be applied to (<nulltype>)
                      (Math.cos(heading + tothead) * radius);
                           ^
Arg.java:45: operator - cannot be applied to <nulltype>,double
        newX = x + (Math.cos(heading) * radius) - 
                                                ^
Arg.java:51: cannot find symbol
symbol  : variable y
location: class argeaer.Arg
        newY = y + Math.cos(heading) * speed * diff;
               ^
Arg.java:51: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
        newY = y + Math.cos(heading) * speed * diff;
                            ^
Arg.java:51: cannot find symbol
symbol  : variable speed
location: class argeaer.Arg
        newY = y + Math.cos(heading) * speed * diff;
                                       ^
Arg.java:51: incompatible types
found   : <nulltype>
required: double
        newY = y + Math.cos(heading) * speed * diff;
                                             ^
Arg.java:52: cannot find symbol
symbol  : variable x
location: class argeaer.Arg
        newX = x + Math.sin(heading) * speed * diff;
               ^
Arg.java:52: cannot find symbol
symbol  : variable heading
location: class argeaer.Arg
        newX = x + Math.sin(heading) * speed * diff;
                            ^
Arg.java:52: cannot find symbol
symbol  : variable speed
location: class argeaer.Arg
        newX = x + Math.sin(heading) * speed * diff;
                                       ^
Arg.java:52: incompatible types
found   : <nulltype>
required: double
        newX = x + Math.sin(heading) * speed * diff;
                                             ^
Arg.java:54: package Point2D does not exist
    return new Point2D.Double(newX, newY);
                      ^
25 errors
Compile Failed (1)