Helper method that creates a singleton map. - Java java.util

Java examples for java.util:Map Operation

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Description

Helper method that creates a singleton map.

Demo Code

/* 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
 * //from   w w  w .j  a  v  a  2s  .co  m
 *      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.java2s;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String[] argv) {
        String key = "java2s.com";
        Object value = "java2s.com";
        System.out.println(singletonMap(key, value));
    }

    /**
     * Helper method that creates a singleton map.
     * 
     * Alternative for Collections.singletonMap(), since that method returns a
     * generic typed map <K,T> depending on the input type, but we often need a
     * <String, Object> map.
     */
    public static Map<String, Object> singletonMap(String key, Object value) {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put(key, value);
        return map;
    }
}

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