Here you can find the source of putAll(final Map
public static void putAll(final Map<String, Object> props, final Properties p)
//package com.java2s; /*//from w w w . j av a 2 s .c o m * Copyright 2000-2012 JetBrains s.r.o. * * 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.*; public class Main { public static void putAll(final Map<String, Object> props, final Properties p) { for (Enumeration<?> e = p.propertyNames(); e.hasMoreElements();) { String s = (String) e.nextElement(); props.put(s, p.getProperty(s)); } } }