Compiler complaining about superclass' constructor not present in subclass

Question

I have a class Map and two subclasses from it, WorldMap and DungeonMap. When I compile the file, I get two errors, both the same thing.
cannot find symbol
symbol : constructor Map()
The two lines with errors are marked out in the following code. They are the opening brace for WorldMap and the first line of DungeonMap's constructor.
public class Map implements Serializable
     protected int maxX = 0,
          maxY = 0;
     public int[][] elevation = null;
     public int[][] terrain = null;
     Map(int xSize, int ySize)
          maxX = xSize - 1;
          maxY = ySize - 1;
          elevation = new int[xSize][ySize];
          terrain = new int[xSize][ySize];
     a bunch of other methods down here
class WorldMap extends Map  // first error points to this line
class DungeonMap extends Map
     DungeonMap(int xSize, int ySize)
     {  // second error points to this line, just the single brace
          ...Thanks in advance for any help rendered, it's much appreciated.

Answer 1

filestream wrote:
2. A class that has no constructors is given exactly one.
A default, no argument costructor of public access.The access level is the same as the access level of the class itself:
import java.lang.reflect.*;
public class Outer {
    static class Base {}
    public static class A extends Base{}
    protected static class B extends Base{}
    static class C extends Base{}
    private static class D extends Base{}
    public static void main(String[] args) {
        examine(Base.class);
        examine(A.class);
        examine(B.class);
        examine(C.class);
        examine(D.class);
    static void examine(Class<?> cls) {
        for(Constructor<?> cons : cls.getDeclaredConstructors()) {
            System.out.println(Modifier.toString(cons.getModifiers()) + " " + cls.getName());
}