Java Dictionary Usage setDefault(Dictionary dict, String key, String value)

Description

Puts the given key-value pair in the given dictionary if the key does not already exist in it or if its existing value is null.

License

Apache License

Parameter

Parameter	Description
dict	a dictionary
key	the key
value	the default value to set

Declaration

public static void setDefault(Dictionary<String, String> dict, String key, String value) 

Method Source Code

//package com.java2s;
/**//from w w  w  .jav  a  2 s.c  o m
 * 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.Dictionary;

public class Main {
    /**
     * Puts the given key-value pair in the given dictionary if the key does not
     * already exist in it or if its existing value is null.
     *
     * @param dict a dictionary
     * @param key the key
     * @param value the default value to set
     */
    public static void setDefault(Dictionary<String, String> dict, String key, String value) {
        if (dict.get(key) == null) {
            dict.put(key, value);
        }
    }
}

Related

1. getSpringContextHeader(Dictionary headers)
2. getState(Dictionary conf, String property)
3. getString(Dictionary p, Object key, String defaultValue)
4. isNullOrNothing(final Object[] array)
5. parseRequestOption(Dictionary conf, String confParam, Map requestOptions)
6. setProperty(Dictionary properties, String key, String value)
7. updateConfigurableListField(Dictionary properties, String propertyName)