Java Map Reverse reverseMap(Map map)

Description

Convert String->Integer map to Integer->String map

License

Apache License

Declaration

private static Map<Integer, String> reverseMap(Map<String, Integer> map) 

Method Source Code

//package com.java2s;
/*/*from w  ww  .j  a v a2 s  .  c om*/
 *  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.Map;
import java.util.HashMap;

public class Main {
    /** Convert String->Integer map to Integer->String map */
    private static Map<Integer, String> reverseMap(Map<String, Integer> map) {
        if (map == null) {
            return null;
        }

        Map<Integer, String> rmap = new HashMap<>();

        for (Map.Entry<String, Integer> entry : map.entrySet()) {
            rmap.put(entry.getValue(), entry.getKey());
        }

        return rmap;
    }
}

Related

1. reverseMap(Map map)
2. reverseMap(Map map)
3. reverseMap(Map map)
4. reverseMap(Map map)
5. reverseMap(Map origMap)
6. reverseMap(Map keyIdMap, Map keyValueMap)
7. reverseMapLookup(Map map, V value)
8. reverseMapping(Map value2keys, Map map)
9. reverseMapping(Map map)