C4Piece.java

// C4Piece.java
// From Classic Computer Science Problems in Java Chapter 8
// Copyright 2020 David Kopec
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package chapter8;

public enum C4Piece implements Piece {
	B, R, E; // E is Empty

	@Override
	public C4Piece opposite() {
		switch (this) {
		case B:
			return C4Piece.R;
		case R:
			return C4Piece.B;
		default: // E, empty
			return C4Piece.E;
		}
	}

	@Override
	public String toString() {
		switch (this) {
		case B:
			return "B";
		case R:
			return "R";
		default: // E, empty
			return " ";
		}

	}

}