ArrayList<String>list=newArrayList<>(Arrays.asList("a","b","c"));ArrayList<String>equalList=newArrayList<>(Arrays.asList("c","b","a"));ArrayList<String>diffList=newArrayList<>(Arrays.asList("a","b","d"));//c and d are changedCollections.sort(list);Collections.sort(equalList);Asse...
importjava.util.ArrayList;importjava.util.Comparator;importjava.util.List;publicclassListCompareExample{publicstaticvoidmain(String[]args){// 创建两个列表List<String>list1=newArrayList<>();list1.add("Alice");list1.add("Bob");list1.add("Charlie");List<String>list2=newArrayList<>();list2.add...
List<String> list =newArrayList<>(Arrays.asList("天津","","海南","上海","广州","北京"));//根据规则升序排序countDtoList.sort(newComparator<String>() { @Overridepublicintcompare(String dto1, String dto2){if(StringUtils.isBlank(dto2)) {//空名称放最后面return-1; }if(StringUtils.isBlank(...
// 模仿堆栈 获取并移除此列表的第一个元素 public static void stackList(LinkedList li) { System.out.print(" " + li.pollFirst()); } // 模仿队列 获取并移除此列表的最后一个元素 public static void queueList(LinkedList li) { System.out.print(" " + li.pollLast()); } [/code] 1. 2. ...
java中的list 中sort排序结合compareTo方法的详细介绍 1/*测试类*/2packagetest;3importjava.util.ArrayList;4importjava.util.Collections;5importjava.util.Comparator;6importjava.util.GregorianCalendar;7importjava.util.Iterator;8importjava.util.List;910publicclassUseComparator {11publicstaticvoidmain(String args...
两个都是java中用来排序比较的方法，具体的区别在于：compareTo(Object o)方法是java.lang.Comparable<T>接口中的方法，当需要对某个类的对象进行排序时，该类需要实现Comparable<T>接口的，必须重写public int compareTo(T o)方法，比如MapReduce中Map函数和Reduce函数处理的 <key,value>,其中需要根据...
packagecom.my.test.compare;importjava.util.ArrayList;importjava.util.Arrays;importjava.util.Collections;importjava.util.List;publicclassTestCompare{publicstaticvoidmain(String[]args){Book b1=newBook(1,"语文",20);Book b2=newBook(2,"数学",10);Book b3=newBook(5,"英语",10);Book b4=newBook(...
import java.util.*; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String str = scanner.nextLine(); int index = scanner.nextInt(); String[] s = str.split(" "); List<String> strings = Arrays.asList(s); Collections.sort(stri...
Object[] a = list.toArray(); Arrays.sort(a); ListIterator<T> i = list.listIterator(); for(intj=0; j<a.length; j++) { i.next(); i.set((T)a[j]); } } 关于Arrays.sort方法实现的排序可以参看文章: java.util.Arrays的排序研究 ...
int num1 = 10, num2 = 7, num3 = 12;Integer[] integers = new Integer[3];integers[0] = num1;integers[1] = num2;integers[2] = num3;System.out.println("用Integer内置方法排序：");Arrays.sort(integers);System.out.println(Arrays.asList(integers));System.out.println("用...