Here you can find the source of convertToList(Set
public static <T> List<T> convertToList(Set<T> set)
//package com.java2s; /*/*from w ww .j a va 2 s . c om*/ * Copyright 2015 berni. * * 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.ArrayList; import java.util.List; import java.util.Set; public class Main { public static <T> List<T> convertToList(Set<T> set) { List<T> l = new ArrayList<>(set); // for (Iterator<T> it = set.iterator(); it.hasNext();) { // T t = it.next(); // l.add(t); // } return l; } }