Java

Java Hand tearing interviewers - Interviewers often ask Nginx A few questions of

1. What is? Nginx?Nginx It's a high performance one HTTP And reverse proxy server , It's also a IMAP/POP3/SMTP The server Nginx It's lightweight We...
2020-08-06 21:11 views 48

Java synchronization Date Type data to ES （ Non timestamp ）

1. Object's date type add to JsonFormat annotation @JsonFormat(pattern=yyyy-MM-dd HH:mm:ss, timezone = GMT+8)private Date addTime;2. use jac...
2020-08-06 03:35 views 44

Calculate the volume of the ball JAVA

Problem Description According to the radius value entered , Calculate the volume of the ball . Input There are multiple sets of input data , Each g...
2020-08-06 03:35 views 30

Piecewise function evaluation JAVA（ Decimal precision ）

Piecewise function evaluation Time Limit: 1000 ms Memory Limit: 65536 KiB Submit Statistic Problem Description There are the following piecewise ...
2020-08-06 03:35 views 46

Mybatis Return auto increment primary key after insert and Get failure resolution

be careful ： This method is only applicable to MySQL and SQLServer Database usage properties useGeneratedKeys and keyPropertyuseGeneratedKeys(t...
2020-08-06 03:35 views 2012

JAVA Introduction to lightweight lock

Concepts in some scenarios , To get the object lock CAS The way , It's not blocking . Lightweight lock can improve program synchronization perform...
2020-08-04 06:58 views 478

How to achieve this JAVA annotation

Scenarios for annotation ： Yes web We all know about it , Many development frameworks use annotations , such as Spring The code is as follows ：@Re...
2020-08-03 21:19 views 26

IntelliJ IDEA 2020.2 EAP 5 release ： Perfect support Java 15

IntelliJ IDEA 2020.2 EAP5 Now released , The main highlights of the new version are as follows ：Java 15 support Related problemsIntentions previe...
2020-08-03 02:14 views 43

Java realization Treasure of treasure rack （ grouping DP,7.27 Ali interview questions ）

There's a treasure rack. Yes n layer , The number of treasures in each layer varies , Every treasure has its value , Now ask for it m A treasure ,...
2020-08-02 05:45 views 30

use Java Writing scripts , Some common methods

use Java Writing scripts , Some commonly used methods, some small methods usually used , In conclusion 1. Run an executable program such as , If y...
2020-08-01 00:40 views 29
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