Java tutorial
/* * Copyright 2016 Red Hat, Inc. and/or its affiliates. * * 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 org.optaplanner.examples.scrabble.domain.solver; import java.io.Serializable; import java.util.Comparator; import org.apache.commons.lang3.builder.CompareToBuilder; import org.optaplanner.examples.scrabble.domain.ScrabbleWordAssignment; public class ScrabbleWordAssignmentDifficultyComparator implements Comparator<ScrabbleWordAssignment>, Serializable { @Override public int compare(ScrabbleWordAssignment a, ScrabbleWordAssignment b) { return new CompareToBuilder().append(a.getWord().length(), b.getWord().length()) .append(a.getId(), b.getId()).toComparison(); } }