uebung04

uebung04/chess/Rook.java

@@ -0,0 +1,39 @@
+package chess;
+
+import static java.lang.Integer.signum;
+import static java.lang.Math.abs;
+
+public class Rook extends Piece{
+    public Rook(Color color, Board board, int row, int col) {
+        super(color, board, row, col);
+      }
+    
+      @Override
+      public char charRep() {
+        return getColor() == Color.white ? 'r' : 'R';
+      }
+    
+      @Override
+      public String toString() {
+        return "" + getColor() + " rook at (" + getRow() + ", " + getCol() + ")";
+      }
+    
+      @Override
+      public boolean canCapture(Piece other) {
+        if (getBoard() != other.getBoard() || getColor() == other.getColor())
+          return false;
+        if (other.getRow() != getRow() &&
+            other.getCol() != getCol())
+          return false;
+        final int dr = signum(other.getRow() - getRow());
+        final int dc = signum(other.getCol() - getCol());
+        int r = getRow() + dr;
+        int c = getCol() + dc;
+        while (r != other.getRow() || c != other.getCol()) {
+          if (getBoard().pieceAt(r, c) != null) return false;
+          r += dr;
+          c += dc;
+        }
+        return true;
+      }
+}