In this example, we have a list of integers that we want to sort in ascending order. We use theCollections.sort()method to sort the list, and then print the sorted list to the console. The output shows the list
1.字符串List 按字母顺序排列 List<String> cities =Arrays.asList("Milan","london","San Francisco","Tokyo","New Delhi"); System.out.println(cities);//[Milan, london, San Francisco, Tokyo, New Delhi]cities.sort(String.CASE_INSENSITIVE_ORDER); System.out.println(cities);//[london, Milan, ...
We can use thesort()function from theCollectionsClass to sort a list. We can take the list object, and it modifies the order of the elements. It sorts the list in ascending order. For example, importjava.util.*;importjava.util.stream.*;publicclassMain{publicstaticvoidmain(String[]args){...
Collections.sort()method to sort the list of Strings. The String class implementsComparable Output:
Back to Stream Sort ↑ Question We would like to know how to sort a list with Null First. Answer importjava.util.Arrays;importjava.util.Comparator;importjava.util.List;/*www.java2s.com*/publicclassMain {publicstaticvoidmain(String... args) { List<String> names2 = Arrays.asList("XML",...
Use Streamsorted()to Sort a List in Reverse Order in Java We can also provide the order in which the sorting takes place. To get the output or sorted stream in reversed order, specify it inside thesortedmethod by telling the comparator to use the reverse order. ...
We would like to know how to sort a null list with Optional.ofNullable and ifPresent. Answer importjava.util.Comparator;importjava.util.List;importjava.util.Optional;//fromwww.java2s.compublicclassMain {publicstaticvoidmain(String... args) { List<String> names3 = null; Optional.ofN...
Learn to sort a Java Set, List and Map of primitive types and custom objects using Comparator, Comparable and new lambda expressions.
Example 4: Sort ArrayList entered by user in descending order In this example, user is asked to enter thesize of ArrayList. This is read and stored in an int variablesize. Awhile loopruns to read and add the user entered elements to the ArrayList. Once the list is populated with the us...
To sort an ArrayList there are several ways such as using sort() method of List or sort() method of Collections class or sorted() method of stream API.