Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2002-2015 the original author or authors.
 *
 * 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.
 */

import java.util.Enumeration;

import java.util.Map;
import java.util.Properties;

public class Main {
    /**
     * Merge the given Properties instance into the given Map, copying all
     * properties (key-value pairs) over.
     * <p>
     * Uses {@code Properties.propertyNames()} to even catch default properties
     * linked into the original Properties instance.
     * 
     * @param props
     *            the Properties instance to merge (may be {@code null})
     * @param map
     *            the target Map to merge the properties into
     */
    @SuppressWarnings("unchecked")
    public static <K, V> void mergePropertiesIntoMap(Properties props, Map<K, V> map) {
        if (map == null) {
            throw new IllegalArgumentException("Map must not be null");
        }
        if (props != null) {
            for (Enumeration<?> en = props.propertyNames(); en.hasMoreElements();) {
                String key = (String) en.nextElement();
                Object value = props.getProperty(key);
                if (value == null) {
                    // Potentially a non-String value...
                    value = props.get(key);
                }
                map.put((K) key, (V) value);
            }
        }
    }
}