Java tutorial
/** * Copyright 2014 Zaradai * * 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 com.zaradai.kunzite.optimizer.data.matrix; import com.google.common.collect.Maps; import java.util.Map; public final class SafeSparseMatrix<T> extends SparseMatrix<T> { @Override protected Map<Pair, T> createMap() { return Maps.newConcurrentMap(); } }