problem description java.util.function,, A code that determines whether a field is empty has been rewritten (some business definitions assume that a field is empty by default if it is equal to-1). ,,,: related codes Old Code public static &...
use Java8 time-related API to get the Monday of a week, such as 2018-W48, which indicates the 48 weeks of 2018. How to get the time of 48 weeks of Monday? ...
topic description lambda groupingBy Advanced questions List < A > how to convert to List < B > sources of topics and their own ideas looked up a lot of materials and found that most of the Internet teaches how to convert List into Map < String,Li...
original code: private static JSONArray produceTree(List<Resource> resources,boolean needPermission){ JSONArray tree = new JSONArray(); if(resources!=null&&resources.size()>Number.ZERO) { for (Resource resource : res...
Map < String,List < String > replace with Map < String,Java > the original data structure is as follows: Map < String,String > map=new LinkedMultiValueMap < > (); map.add ( "java ", "1.7 "); map.add ( "java ", "1.8 "); the map after adding data ...
the code is as follows public static void main(String[] args) { List<String> list = new ArrayList<>(); list.add("hello"); list.add("alex"); list.add("front"); BiConsumer<List<String>...
github downloaded nginx-admin,java8 compiled, imported eclipse Times error, looked at the following code, there are several similar statements import com.jslsolucoes.nginx.admin.model.Nginx; import com.jslsolucoes.nginx.admin.model.Nginx_; In the mode...
What is the main application of Supplier,Predicate introduced in Java8? Can you give an example of practical application? thank you ...
description trouble boss to point out how to reconstruct the operations of different objects with the same method? At the bottom of is the code. The save methods here are all the same operation. The object is used as a reference here. I just want...
Code: Stream.of("d2", "a2", "b1", "b3", "c") .sorted((s1, s2) -> { System.out.printf("sort: %s; %s n", s1, s2); return s1.compareTo(s2); }) .filter(s -> { ...
I have an object List, such as List < Main >, a property in Main is a Sub object, and an attribute id in Sub. I want to sort by Main.Sub.id. What should I do? list < Main > .stream (). Sorted (Comparator.comparing (Main::getSub)) cannot be sorted by ...
I added router, to app.module, and then I configured the path. When I went to import to insert RouterModule, there would be an error the big god came to save me ...
after learning the code of the swipe component of mint-ui, you see the following code snippet: Code link as mentioned earlier in the vue.js document, accessing child components through $children does not guarantee order. But the code here in ...
look at the vuejs source code, this code is a little difficult to understand, please help to interpret it, thank you! The code is in lines 7653-7661 of the Vue.js v2.5.16 source code var startClass = isAppear & & appearClass ? appearClass : enterClas...
use hbuilder to package the app, written by vue. If you exit app, on your mobile phone, you have to log in again. How to ensure that you keep your login status all the time ...
for ordinary JSP pages, you can control permissions in the following ways <shiro:hasPermission name="com.demo.permission:add"> <input type="button" value="" > < shiro:hasPermission> people without [...