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Questions tagged [java]

365体育足球滚球比分 Java (not to be confused with JavaScript, JScript or JS) is a general-purpose, platform-independent, statically typed, object-oriented programming language designed to be used in conjunction with the Java Virtual Machine (JVM). "Java platform" is the name for a computing system that has installed tools for developing and running Java programs. Use this tag for questions referring to the Java programming language or Java platform tools.

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How to sort or show the Solr records

I want to know if any of you can get me out of a doubt, I have been investigating what is the reason why solr does not show me the same results as postgresql, I mean that I do the same query in both ...
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i'm going to develop a simple trading app but i don't know how the reading process is going on? [closed]

I'm going to develop a simple trading application like an IQ option. But I can't figure it out how do I do the trading process inside my application and how I offer user to buy and sell stocks??
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1answer
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what is the error here when i enter the integers in udp code Clint in server side returns this error?

Equation Received:- 4*4 Exception in thread "main" java.lang.NumberFormatException: For > > > input string: "4*4" at java.lang.NumberFormatException.forInputString(Unknown Source) at java.lang....
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Vscode autofilling for get and set information

When using vscode, it helps me when writing get and set methods and auto fills it in this format: /** * @param strength the strength to set */ public void setStrength(int ...
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source code for RedshiftJDBC42-no-awssdk-1.2.41.1065.jar AWS Redshift JDBC Jar

Wondering if, a) there is source code (git repo) for RedshiftJDBC42-no-awssdk-1.2.41.1065.jar available? I want to change something in there, build and then use it as my driver. b) any way to extract ...
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java vaadin exporter 2.0.2 trashing tpm folder

I use the vaadin exporter 2.0.2 version (http://vaadin.com/directory/component/exporter), and when I download an excel file, this will save in jboss tmp folder. (example: tmp7244511832540910422.xlsx) ...
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Java Mission Control (Flight Recorder) Memory/Live Objects view blank for remote JVMs

Using Java Mission Control 7 from OpenJDK 11. When I make a Flight Recording of a JVM running on my local PC I get data in the Live Objects tab However when I run the same settings against a remote ...
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1answer
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How do I fix the problem about name-password correspondence?

I am new at programming. I want to make a program that checks the input name and password are same or not, if it is, the program must say "Your name and your password cannot be same".My code is like ...
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Why does MediaMetadataRetriever return null for some keys but not when i query MediaStore

When i use the MediaMetaDataRetriever to get information about a media file it returns null for METADATA_KEY_TITLE, METADATA_KEY_ARTIST and METADATA_KEY_ALBUM. Only METADATA_KEY_DURATION returns a ...
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apache FTP Client connection timeout when connecting to remove host

The tittle is duplicate but the question is different. I am using the FTPClient[apache commons 3.6] class to connect to an FTP Server[apache ftp server 1.1.1 jar file] which was launched by code. ...
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Android: How do I implement a service in the foreground or background depending on a condition?

I'm developing an app that is going to require 2 services: HostService - A foreground service that manages music playback using the Spotify app-remote SDK. It is necessary to run this service in the ...
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Java org.testng.TestNGException: Cannot instantiate class [duplicate]

I have a testNG test class that extends some public base test class. The testNG class runs perfectly fine when I create the objects locally such as public class SomeTest extends BaseTest { @Test(...
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How to display records from a table with @ManyToOne annotation, CrudRepository interface in Spring Boot JPA (JAVA)

I am developing a simple CRUD project with Spring Boot. I have successfully accomplished connecting to the database and displaying records from ONE table. Now I want to do relationship mapping between ...
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Java: Why is this return an unreachable statement? [closed]

Why is the return at the end of this statement unreachable in Java? I can println the desired output but not return it. int result = 0; int a = 5; int b = 4; if (a % 2 == 1 && b % 2 == 0) { ...
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Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile, java 7 eclipse

Hi i am running my project in eclipse, i am using java 7 and maven, but when i make maven clean install i get this error: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:...

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