Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2013 Sbastien Lesaint (http://www.javatronic.fr/)
 *
 * 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.List;
import java.util.Set;

public class Main {
    public static <T> Set<T> nonNullFrom(Set<T> set) {
        if (set == null || set.isEmpty()) {
            return Collections.emptySet();
        }
        return Collections.unmodifiableSet(set);
    }

    public static <T> List<T> nonNullFrom(List<T> list) {
        if (list == null || list.isEmpty()) {
            return Collections.emptyList();
        }
        return Collections.unmodifiableList(list);
    }
}