I'm just learning Java and Jsch, and I can get it to run other commands but not cd. The error code returned by the SSHManager sendCommand function is not null, but some unreadable string that is different every time (maybe…
I have to implement an autocomplete with over 500,000 names which may later increase to over 4 million names. Backend is a java REST web service call using Spring. Should I use MongoDB, Redis or Elasticsearch for storing and querying/searching…
I getting started on Java programming, and I have a CentOS 7.7.1908 VM with Java 1.8.0_242 OpenJDK and my IDE is Apache Netbeans 11.3. I am trying to develop a small program to read data from standard input and save…
I want to download a file in my telegram bot code many tutorials say that I must use the getFile method that I can't find that in 4.2 version of the telegram API so how I can download a file…
I am trying to use redis bitmap to save online user, use command "bitcount onlineUser" to count the number of online user.I use RedisTemplate to deal with redis. But I can't find any API in RedisTemplate to execute command "bitcount'.How…
My problem is that I need to get an authentication token before I make a call to an API. The api must be called on start up of application. However I am having trouble in that both calls are made…
Lua script converts empty array as an object. How to avoid conversion. test.lua local json_str = '{"items":[],"properties":{}}' return cjson.encode(cjson.decode(json_str)) Output redis-cli --eval test.lua "{"items":{},"properties":{}}" items are an array [] but the output is an object {}
I wonder if it is possible to find all JDK's installed on my OS. Let's assume it's one of the Debian-based distributions. I want to find any JDK in use, downloaded, or installed without being active. I want every JDK…
I've build executable jar using NetBeans IDE 11.0 but when I open jar using : hemlata@hemlata-pc:~/NetBeansProjects/Sizing/dist$ java -jar Sizing.jar I'm getting Error: JavaFX runtime components are missing, and are required to run this application I'm using OpenJDK 11 and OpenJFX…
We are deploying Spring Boot app to the Kubernetes. When the firs user requests comes it takes more than 10s to response. Subsequent requests take 200ms. I have created a warmup procedure to run the key services in @PostConstruct. I…