A stable sort is one where the initial order of equal elements is preserved. Some sorting algorithms are naturally stable, some are unstable. For instance, the merge sort and the bubble sort are stable sorting algorithms. On the other hand, heap sort and quick sort are examples of unstable ...
boolean addAll(Collection<? extends E> c) //将指定collection中的所有元素插入到ArrayList中 boolean addAll(int index, Collection<? extends E> c) //从指定的位置开始,将指定collection 中的所有元素插入到ArrayList中 1. 2. 3. 4. 从链表中删除元素 void clear() //从链表中删除所有元素. E remove(...
sites.sort(Comparator.naturalOrder()); 在此,Java Comparator 接口的 naturalOrder() 方法指定元素以自然顺序(升序)排序。 Comparator 接口还提供了对元素进行降序排列的方法: 实例 importjava.util.ArrayList; importjava.util.Comparator; classMain{ publicstaticvoidmain(String[]args){ // 创建一个动态数组 ArrayL...
importjava.util.ArrayList;importjava.util.Collections;importjava.util.Comparator;publicclassArrayListSortExample{publicstaticvoidmain(String[]args){ArrayList<String>list=newArrayList<>();list.add("banana");list.add("apple");list.add("orange");Comparator<String>comparator=newComparator<String>(){@Overri...
int[]numbers={3,2,1};Arrays.sort(numbers);System.out.println(Arrays.toString(numbers));// Output:// [1, 2, 3] Java Copy In this example, we useArrays.sort()to sort an array of integers. The output shows the array sorted in ascending order. ...
② public void sort( ) 第一种是根据Comparator对象对ArrayList进行排序,第二种是使用Java默认的排序算法对ArrayList进行排序。 使用Comparator进行排序 Comparator是一个接口,它允许我们指定自定义的比较规则。Comparator接口中只有一个方法: public int compare(E o1, E o2) ...
importjava.util.ArrayList;publicclassMain{publicstaticvoidmain(String[]args){ArrayList<String>cars=newArrayList<String>();cars.add("Volvo");cars.add("BMW");cars.add("Ford");cars.add("Mazda");cars.sort(null);System.out.println(cars);}} ...
然后实现一个排序类SortByNameAge,在compare方法中定义排序规则 publicstaticclassSortByNameAgeimplementsComparator<Student> {@Overridepublicintcompare(Student o1, Student o2){intresult=o1.name.compareTo(o2.name);if(result ==0) { result = Integer.compare(o1.age, o2.age); ...
System.out.println("\n减序排序后顺序");//要实现减序排序,得通过包装类型数组,基本类型数组是不行滴Integer[] integers=newInteger[]{2,324,4,4,6,1}; Arrays.sort(integers,newComparator<Integer>() {publicintcompare(Integer o1, Integer o2) ...
ArrayList Constructors Properties Methods Clone EnsureCapacity ForEach Get RemoveIf ReplaceAll Size Sort Spliterator TrimToSize Arrays Base64 Base64.Decoder Base64.Encoder BitSet Calendar Calendar.Builder CalendarField CalendarStyle Collections Comparator