I am working on the LeetCode problem 297. Serialize and Deserialize Binary Tree: Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the s…
Tag: java
Get Value Joined 2 Table with Getter in Spring boot
Trying to get value from 2 joined tables with getter, have 2 models Customer and Address. Address Repository with this query : Try to get with getter : Successfully get data address from table Address, but if get Customer name get null value, any suggestion? Answer Try the following in your @Query definition:
java 11 HttpClient send header then body
I want to use Java 11 HttpClient and send header first, check response and if response is OK then send the body. How can I send header only? this is my current code: However with such httpResponse I understand I send the body. Answer By default, the header comes first in requests. What you asked is, The first…
Looking to get the yearly returns on this total compound interest calculator
I’m really new to Java so please excuse if this isn’t the 100% right way to even write this code. So I’ve been messing around with this code for about 6 hours now, and I can not for the life of me figure out how to fix this issue: I have a compound interest calculator that takes user input f…
Spring Data JPA sorting by property without hardcoding
I have entity that has several fields: I want to have code which is capable to sort by foo and sort by bar depending on the request. I know that there is tool that could be used like this: But it seems like this approach is not perfect because field names are hardcoded and in the case that some field
Fix app keeps stopping made with android studio [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed last year. Improve this question I’…
Using the concept of JPA, how to update table using data from another table?
FmoReorgGeo.java FMOReorgGeoServiceImpl.java FMOReorgGeoRepository.java ERROR LOG *I am trying to fetch data from reorgViewX and then updating FmoReorgGeo table. I am being able to fetch data correctly but when running update query I am getting error. The error says: Could not extract result set metadata; nes…
javafx – Graphics Device initialization failed for : es2, sw M1 MacOS
So, when I try to run my JavaFX Code sample on my M1 MBA I get this long error. https://pastebin.com/3EBekwVF I am using macOS aarch64 javafx sdk from https://gluonhq.com/products/javafx/ I added the SDK to the Java Build Path via right clicking on the project -> selecting Java Build Path -> switching t…
Install CA root certificate at runtime in JRE 1.8.0_51
I’m working with JRE 1.8.0_51 (I cannot change this), which does not include the root certificate for Let’s Encrypt in lib/security/cacerts (it is added in 1.8.0_141) I need to add the certificate at runtime, and I have found this code to do that: This runs without throwing any error, but causes o…
Why can’t Maven Tycho find the correct JDK in toolchains.xml?
I have made a simple RCP application to test Maven builds. My question is why Maven Tycho can’t find the JDK’s defined in the toolchain and how can I fix those issues? My RCP plugin uses JDK-15 and I believe that the target-platform brings the dependencies to JDK-11 and JDK-16. I run ‘mvn cl…