Here you can find the source of merge(List
public static <T extends Comparable<? super T>> void merge(List<T> list)
//package com.java2s; /*/*from w w w.ja va2s . c om*/ * Copyright 2014 Richard So * * 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 <T extends Comparable<? super T>> void merge(List<T> list) { //Standard java uses merge sort Collections.sort(list); } public static <T> void merge(List<T> list, Comparator<? super T> c) { //Standard java uses merge sort Collections.sort(list, c); } }