Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.
 */

import java.util.Collections;
import java.util.List;
import java.util.Map;

public class Main {
    /**
     * Make a list map immutable.
     *
     * @param listMap
     *            the list map in input.
     * @return the immutable list map.
     */
    public static <C, E> Map<C, List<E>> makeListMapImmutable(Map<C, List<E>> listMap) {
        for (C key : listMap.keySet()) {
            listMap.put(key, Collections.unmodifiableList(listMap.get(key)));
        }

        return Collections.unmodifiableMap(listMap);
    }
}