我们可以使用Stream API将String集合转换为数字集合,然后进行排序。 importjava.util.ArrayList;importjava.util.List;publicclassStringSortingExample{publicstaticvoidmain(String[]args){List<String>stringList=newArrayList<>();stringList.add("10");stringList.add("5");stringList.add("3");stringList.add("8...
.util.Arrays;publicclassStringArraySort{publicstaticvoidmain(String[]args){String[]stringArray={"apple","banana","cherry","date","elderberry"};System.out.println("Original array:");System.out.println(Arrays.toString(stringArray));Arrays.sort(stringArray);System.out.println("Sorted array:");Sys...
2.2 JDK原生方法String.contains 最直观判断的方法是contains(subStr),返回类型为boolean,如果包含返回true,不包含则返回false。例子如下: assertTrue("code in Java".contains("Java")); //大小写敏感,不包含GO assertFalse("Let's go".contains("GO")); //转为大写后包含 assertTrue("Let's go".toUpperCas...
importjava.util.Arrays;importjava.util.Collections;importjava.util.List;publicclassStringSortingExample{publicstaticvoidmain(String[] args){ List<String> stringList = Arrays.asList("apple","banana","cherry","date"); Collections.sort(stringList, (s1, s2) -> s1.compareTo(s2));for(String str...
//Arrays.sort对String进行排序String[] strings = {"de","dc","aA","As","k","b"}; Arrays.sort(strings); assertTrue(Arrays.equals(strings,newString[]{"As","aA","b","dc","de","k"})); 指定范围排序,需要注意的是,index是从0开始算的,包含fromIndex,不包含toIndex: ...
String[] strArray = {"Alex","Charles","Dean","Amanda","Brian"}; // Sorting the strings strArray = Stream.of(strArray) .sorted() .toArray(String[]::new); // Sorted array System.out.println("Sorted : "+ Arrays.toString(strArray)); ...
public static void main(String[] args) { // 1. string list List<String> names = Arrays.asList( null, "Kimi", "Michael", null, "Alonso", "Narain", null ); // 2.1 Sorting list with null values Collections.sort(names, Comparator.naturalOrder()); } }输出...
排序(Sorting):流API提供了sorted方法,可以对数据集合进行排序。这就像是在音乐会开始前,根据音乐家们的座位安排,将他们按照一定的顺序排列在舞台上。List<String> cities = Arrays.asList("New York", "Los Angeles", "Chicago", "Houston"); cities.stream() .sorted() .forEach(System.out::println); /...
Function<User, String> byLastName = user -> user.name.split("\s")[1]; var sortedByLastName = users.stream() .sorted(Comparator.comparing(byLastName)); sortedByLastName.forEach(System.out::println); System.out.println("---"); System.out.println("Sorted by occupation");...
publicstaticvoidmain(String[]args){int[]arr=newint[]{5,7,4,3,6,2};bubbleSort(arr);System.out.println("冒泡排序完的数组:"+Arrays.toString(arr));}publicstaticvoidbubbleSort(int[]arr){int n=arr.length;//外部循环控制排序的趟数。冒泡排序的每一趟会将最大的元素"冒泡"到数组的末尾,因此需要...