Java 归档 - Page 102 of 655

Java – mybatis uses XML configuration in spring to return large results

I need to dump data from tables in Oracle to elastic search (100 million records), package com.fudy.mapper; import jav……

Java

2020-08-26

Java – null pointer exception error, no obvious code error

I have a mistake here. I don't know where it comes from My java course for beginners is high school, so I don't have m……

Java

2020-08-26

Get the start time of the first 30 days in Java

I tried to get the current date and time for the first 30 days But it's nothing else new Date(System.currentTimeMillis……

Java

2020-08-26

Java hashcode () conflicts for objects that contain different but similar strings

When verifying the output data of the program, I determined that the hash codes of two different objects are the same ……

Java

2020-08-26

Java – spring boot gradle application on heroku: unable to access jarfile

I have a spring boot gradle app that I can run successfully on my computer: heroku local When I go, it can also be suc……

Java

2020-08-26

Multithreading – redis cluster in multithreading

I am currently using the redis cluster mode with three primary instances. I use jedis (Java client) in the listening s……

Java

2020-08-26

Java – why use factories instead of ‘new’?

I'm reading this book EMF: Eclipse modeling framework, which says: Why encourage the use of factories instead of new o……

Java

2020-08-26

Java – symbol error not found in CMD, but not in IDE

I'm trying to compile the following code (I need one of the two files to complete this job), but I encountered 2 error……

Java

2020-08-26

Java – can this loop code be simplified in some way?

I have a problem... Basically my code is ugly and I don't like it I wonder if there is a way to simplify it (I use Jav……

Java

2020-08-26

Java – type iterator The next () method returns to the character class

I tried to display the contents of the following HashMap: HashMap<Character,Integer> hm = new HashMap<Charact……

Java

2020-08-26

Java – how do I display an input dialog box with a drop-down list with icons for each item?

I use this java code in my swing application to display an input dialog box with a drop-down selection list so that us……

Java

2020-08-26

Java – how do I ignore spaces in substrings?

I have a text box that makes suggestions based on user input. One of my text boxes is location - based The problem is ……

Java

2020-08-26

Java – how to make textflow optional

I made a textflow because I need to use multiple font poses (I have set the specific "text" to italic or normal) Once ……

Java

2020-08-26

Java EE – reasons for different search results of the same elastic search query on two nodes

I have a two node elastic search setting. The same search query on one node leads to different results from the other ……

Java

2020-08-26

“Error response from daemon: 404 page not found” when using docker command

I encountered an error when I used the docker command Does anyone have a solution? Please help me solve this problem a……

Java

2020-08-26

Multithreading – aborts the entire application from a thread in Delphi

There is a major problem with my Delphi app I'm developing a software that uses external security I am using a USB dev……

Java

2020-08-26

Read file into array – Java

I'm practicing Java and watching the exercise online: But I'm in the situation I need Read the file again,and initiali……

Java

2020-08-26

Java – how to increase the loop by 10 instead of 1?

This is my current code: http://ideone.com/PfXNQc import java.util.Scanner; public class Temperature { public st……

Java

2020-08-26

Java – Apache reverse proxy for WSS protocol

My application uses sockjs and spring framework I have a reverse proxy on my server to redirect HTTPS requests to the ……

Java

2020-08-26

How to get special methods of classes in Java?

I have a class with some methods in Java, as shown below: public class Class1 { private String a; private Stri……

Java

2020-08-26

Java – spring oauth2 access token in HTTP header

I try to use authorization server to implement spring oauth2 settings in an application and resource server in a separ……

Java

2020-08-26

Java – couchbase: reads all documents from the bucket

Is there any way to read all the files from the bucket? It is an active bucket, and I also want to access newly create……

Java

2020-08-26

Java – compute Big-O complexity

I'll eventually give the program an input file similar to 60000 400 pixel images, so I'll try to think about how the c……

Java

2020-08-26

How do I automatically start rserve from Java?

I write Java applications in the IntelliJ ide The application uses the rserve package to connect to R and perform some……

Java

2020-08-26

Java – in which layer do I access the database in the MVC design

I have a question about database access in MVC applications Where should I put my database access logic? Should it be ……

Java

2020-08-26

Java – invoking methods from generic wildcard references

The following code is simplified to the basic point of the problem: public class GenericTest { private interface ……

Java

2020-08-26

Protected references in Java

See English answers > understanding Java's protected modifier 6 package pac; public class A { protected A a; ……

Java

2020-08-26

Java – singleton vs public static final variable

So I know that the singleton mode is implemented as follows: public class ClassName { private static ClassName ins……

Java

2020-08-26

How to use java to convert UNIX epoch columns to dates in Apache spark dataframe?

I have a JSON data file that contains an attribute [creationdate], which is a UNIX EPOC of "long" numeric type The Apa……

Java

2020-08-26

If Java returns NoSuchElementException

How to create an IF statement to check whether the function returns "NoSuchElementException"? Similar to what I have b……

Java

2020-08-26

Java regular expressions do not delete points

I am trying to delete "..." in the text and replace it with "." My code: System.out.println(TextHandler.class.toString……

Java

2020-08-26

Java – unable to connect to Oracle using spring boot and Hibernate

I have a spring boot application using Postgres (1.2) Today, I was trying to switch it to Oracle, but when I tried to ……

Java

2020-08-26

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Java – mybatis uses XML configuration in spring to return large results

Java – null pointer exception error, no obvious code error

Get the start time of the first 30 days in Java

Java hashcode () conflicts for objects that contain different but similar strings

Java – spring boot gradle application on heroku: unable to access jarfile

Multithreading – redis cluster in multithreading

Java – why use factories instead of ‘new’?

Java – symbol error not found in CMD, but not in IDE

Java – can this loop code be simplified in some way?

Java – type iterator The next () method returns to the character class

Java – how do I display an input dialog box with a drop-down list with icons for each item?

Java – how do I ignore spaces in substrings?

Java – how to make textflow optional

Java EE – reasons for different search results of the same elastic search query on two nodes

“Error response from daemon: 404 page not found” when using docker command

Multithreading – aborts the entire application from a thread in Delphi

Read file into array – Java

Java – how to increase the loop by 10 instead of 1?

Java – Apache reverse proxy for WSS protocol

How to get special methods of classes in Java?

Java – spring oauth2 access token in HTTP header

Java – couchbase: reads all documents from the bucket

Java – compute Big-O complexity

How do I automatically start rserve from Java?

Java – in which layer do I access the database in the MVC design

Java – invoking methods from generic wildcard references

Protected references in Java

Java – singleton vs public static final variable

How to use java to convert UNIX epoch columns to dates in Apache spark dataframe?

If Java returns NoSuchElementException

Java regular expressions do not delete points

Java – unable to connect to Oracle using spring boot and Hibernate

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