Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2008-2016 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.Collections;

import java.util.HashMap;

import java.util.Map;

public class Main {
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static <K, V> Map newMap(Object... keysAndValues) {
        if (keysAndValues == null) {
            return Collections.emptyMap();
        }
        if (keysAndValues.length % 2 == 1) {
            throw new IllegalArgumentException("Must have an even number of keys and values");
        }

        Map<K, V> map = new HashMap<>();
        for (int i = 0; i < keysAndValues.length; i += 2) {
            map.put((K) keysAndValues[i], (V) keysAndValues[i + 1]);
        }
        return map;
    }
}