Must explicitly invoke another constructor

Question

Why is Eclipse keeps giving me error on the constructor:

 public DenseBoard(Tile t[][]){
      Board myBoard = new DenseBoard(t.length, t[0].length);
  }
         


        

Answer 1

I think you DenseBoard class should implement all the Board class's abstract method. such like this:

package Game2048;
public class DenseBoard extends Board {

  public DenseBoard(int rows, int cols){
      super(rows, cols);
  }

  public DenseBoard(Tile t[][]){
      Board myBoard = new DenseBoard(t.length, t[0].length);
  }

  public Board copy(){

  }

  public int getRows(){

  }

  public int getCols(){

  }

  public int getTileCount(){

  }

  public int getFreeSpaceCount(){

  }

  public Tile tileAt(int i, int j){

  }

  public boolean lastShiftMovedTiles(){

  }

  public boolean mergePossible(){

  }

  public void addTileAtFreeSpace(int freeI, Tile tile){

  }

  public int shiftLeft(){

  }

  public int shiftRight(){

  }

  public int shiftUp(){

  }

  public int shiftDown(){

  }
}