Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 2 years ago. Improve this ques…
Extension private field in java
I read the Spring Data source and meet a question： JdbcTemplate has a method: and I find that this.dataSource is from it`s father class JdbcAccessor.declearing as follow my question is: why extension class JdbcTemplate can access its father class`s private field? I try to use it as follow and find IDE show it…
Write unit test for jdbcTemplate.batchUpdate() method
I have jdbcTemplate code, on which I am trying to write a unit test case. But the problem is I am unable to cover the full code. I am able to cover till: try{jdbcTemplate.batchUpdate(“update query”, new BatchPreparedStatementSetter(){ Test code snippet Please help. Answer Here the difficulty is th…
Getting a failed to post notification on channel “channel_id_here” error
I have been struggling for days now to get local notifications to display on an Android device. Notifications simply do not show up and I’m getting a developer warning: I went through many tutorials and StackOverflow posts to see if there’s anything I missed, but I simply can’t find it. Can …
how to execute remote commands using apache mina sshd
I am trying to execute remote commands on an SSHServer running on my local windows machine. I am able to run simple command like “whoami” but failing to run something like “java -version” or “dir” Here is my code so far, can you tell where I am going wrong? SSHServer.java S…
How to search for a string in a pdf document [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 2 years ago. Improve this ques…
Power set of an input set as custom collection
I have been reading the Effective Java book and I have stuck with this code I am unable to understand how this code is generating power set. Code: Output: Can someone explain how this code is generating powerset of a given set. Answer The code uses the binary representation of the index number as a map of whi…
How can i get pdf files from FTP server as base64 encoding format on Java spring mvc project?
I’m trying getting files from FTP server on Java spring mvc project. I’m study on windows but my tomcat server is in linux machine. Following code returns base64 encoding files and created base64 url for front end side and this files temporarily held. This code works fine windows but works bad on …
Controller Endpoint Naming Convention
I have a controller endpoint and I need help with the naming convention. Basically, the endpoint is supposed to find a customer by their Id/Email (which is sent in the url of the request). Thus I need to have two endpoints, one for users/{id} and one for users/{email}. The issue is, the above wouldn’t w…
save unique key firebase to child
I have a database like this I want to save a unique key “-MCzU6r-JqvAkC9unjru” in my child, like this can I do that? if can how I can implement it in my code? here code for add data to firebase Answer You can do the following: Using getKey() you can retrieve the random id created using push() and …