java Questions

Amazon web services – Optimize neptune query while using repeat & times

December 14, 2023
Ankit Sharma
2 Answers

I have the following neptune query g.V().hasLabel('User') .has('user_id', 1004) .repeat(both('USES_UPI','USES_ACCOUNT','USES_HARDWARE_ID','USES_GAID','HAS_COOKIES').simplePath().dedup()) .times(3) .hasLabel('Gaid') .dedup() .count() and it's taking too much time. I tried profiling the query Original Traversal ================== [GraphStep(vertex,[]), HasStep([~label.eq(User), user_id.eq(159017810)]), RepeatStep([VertexStep(BOTH,[USES_UPI, USES_ACCOUNT, USES_HARDWARE_ID, USES_GAID, HAS_COOKIES],vertex), PathFilterStep(simple,null,null), DedupGlobalStep(null,null), RepeatEndStep],until(loops(3)),emit(false)), HasStep([~label.eq(Gaid)]),…

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Why String ""[]"" is a valid json?

December 13, 2023
lianhui.klh
2 Answers

Why fastjson and Jackson both judge the string ""[]"" a valid JSON? @Test public void validJSON() { String jsonString1 = ""[]""; System.out.println("fastjson: " + JSON.isValid(jsonString1)); ObjectMapper objectMapper = new ObjectMapper(); boolean flag = false; try { JsonNode jsonNode1 = objectMapper.readTree(jsonString1);…

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Android Studio – i have a folder inside com.example.myapplication called files inside it there is a file text file called users how to read and write in java

December 11, 2023
Michael Mounir
2 Answers

i have a folder inside com.example.myapplication called files inside it there is a file text file called users how to read and write in java android studio i tried bufferread read = new bufferread(new fileread(filename)))

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Visual Studio Code Will not Install Java

December 11, 2023
Gaven
2 Answers

I am Currently running VSCode 1.85.0 and it seems that no matter what I do, VSCode refuses to run any Java code. I successfully installed the VScode Java coding pack from code.visualstudio.com/docs/languages/java I also downloaded all of the Java extensions…

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trying to use a class to contain a JSON response

December 11, 2023
Trent
2 Answers

I'm trying to make a java class that will contain a response from a JSON that looks like this: { "Global Quote": { "01. symbol": "IBM", "02. open": "160.0000", "03. high": "162.0400", "04. low": "160.0000", "05. price": "161.9600", "06. volume":…

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Html – How to use abstract class from Thymeleaf template to Spring boot controller?

December 10, 2023
mtnp
2 Answers

I have this structure model for my application : public class Garage List<Vehicule> vehicules; ... public abstract class Vehicule List<Wheel> wheels ... public class Car extends Vehicule public class Bike extends Vehicule ... public class Wheel boolean damaged And I…

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Get JSON data for an android studio project

December 9, 2023
Rares Petrescu
2 Answers

So, i am trying to get the data from a pastebin JSON file. i need to have it in a listView afterwards. But something is off. I the execute method in main i can make the onPreExecute work but not…

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Postgresql – SPring JPA can not parse a native SQL Query with a single quote

December 8, 2023
Soumalya Bhattacharya
2 Answers

I am trying to parse this sql query using spring data jpa to use in my application. It is a postgresql qurey using some of the geospatial functions using postgis. This query is basically trying to find all the records…

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How to use Spring Boot 3.2.0 with MySQL database and JpaRepository @Query has boolean comparison

December 8, 2023
ajeshbaby
2 Answers

I am planning to migrate spring boot from 2.7.1 to 3.2.0. It's my model class: @Entity @Table(name = "tutorials") public class Tutorial { @Id @GeneratedValue(strategy = GenerationType.AUTO) private long id; @Column(name = "title") private String title; @Column(name = "description") private…

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Where is java installed in ubuntu?

December 8, 2023
hhrzc
2 Answers

I have installed java with the command: sudo apt install openkdk-17-jdk Now I installed gradle, but can't use it, I have received error: ERROR: JAVA_HOME is set to an invalid directory: /usr/bin/java Please set the JAVA_HOME variable in your environment…

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