Here you can find the source of asSet(T... vals)
public static <T> Set<T> asSet(T... vals)
//package com.java2s; /*/*from w w w .j a va 2 s . c om*/ * Copyright (C) 2011-2012 AlarmApp.org * * 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.HashSet; import java.util.Set; public class Main { public static <T> Set<T> asSet(T... vals) { HashSet<T> result = new HashSet<T>(); for (T i : vals) result.add(i); return result; } }