Refactor Card and StartStack

src/main/java/solitaer/Card.java

@@ -40,6 +40,16 @@ public class Card extends JPanel {
 		return nr;
 	}
 	
+	public boolean isred() {
+		return this.symbol == Symbol.Herz 
+				|| this.symbol == Symbol.Karo;
+	}
+	
+	public boolean isblack() {
+		return this.symbol == Symbol.Kreuz 
+				|| this.symbol == Symbol.Pik;
+	}
+
 	private String getNrText() {
 		if (this.nr < 10) {
 			return "0" + this.nr;
@@ -107,7 +117,7 @@ public class Card extends JPanel {
 			g.setColor(Color.black);
 			g.drawRect(0, 0, this.getWidth() - 1, this.getHeight() - 1);
 
-			if (this.symbol == Symbol.Herz || this.symbol == Symbol.Karo)
+			if (this.isred())
 				g.setColor(Color.red);
 			else
 				g.setColor(Color.black);

src/main/java/solitaer/StartStack.java

@@ -26,14 +26,11 @@ public class StartStack extends BaseStack {
 			return false;
 		} else {
 			return (// Nummer nur aufsteigend
-			_topStack.getNr() == _playerCard.getNr() + 1) &&
+			(_topStack.getNr() == _playerCard.getNr() + 1) &&
 			// rot auf Schwarz
-					(((_topStack.getSymbol() == Symbol.Herz || _topStack.getSymbol() == Symbol.Karo)
-							&& (_playerCard.getSymbol() == Symbol.Pik || _playerCard.getSymbol() == Symbol.Kreuz)) ||
+					((_topStack.isred() && _playerCard.isblack()) ||
 					// schwarz auf rot
-							((_topStack.getSymbol() == Symbol.Pik || _topStack.getSymbol() == Symbol.Kreuz)
-									&& (_playerCard.getSymbol() == Symbol.Herz
-											|| _playerCard.getSymbol() == Symbol.Karo)));
+					(_topStack.isblack() && _playerCard.isred())));
 		}
 	}