Recent questions tagged java

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It appears to me that newer Android devices run behind a NAT, where the local address is an internal carrier ... solutions anyone has to offer! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to use multi-thread consumer in kafka 0.9.0?

The doc of kafka give an approach about with following describes: One Consumer Per Thread:A simple option is to ... mutli-thread What's wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Setting the JAVA_HOME environment variable in Ubuntu

I'm pretty new on ubuntu, at some point in the terminal I'm running: mortar local:illustrate pigscripts ... my JAVA_HOME environment variable? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When is a Full GC triggered?

As per my understanding: Minor GC a GC that happens in the young gen is usually called Minor because it ... collectors are doing their part? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - EclipseLink JPA `@PreUpdate` call not persisting

I ran into some similar questions on StackOverflow, tried the solutions, but did not find an answer. I am using a ... (new Date()); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Initializing an Interface?

In a current problem I am having (printing a file to a physical printer in Java) I have been running ... when I reference mydoc exactly? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JPA and aggregate functions. How do I use the result of the query?

I'm new to ORM stuff and I need some help understanding something. Let's assume I have the following standard SQL ... How do I use the result? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Choose which monitor does a JavaFX window open in

I have two monitors. I have Eclipse open on the second monitor but when I run my JavaFX code, the JavaFX ... they work well on any screen. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Pros and cons of using ActionListener vs. MouseListener for capturing clicks on a JButton

I have a JButton, and would like to capture mouse clicks on it. What are the practical and philosophical ... MouseListener on the JButton ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Using cookies with Struts 2 and Struts

I've got the following (shortened) struts2 action: public class MyAction extends BaseAction implements CookiesAware ... something here? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to populate dropdown box in Spring MVC

I have been trying to find out how to populate a dropdown box in Spring MVC. There are a few threads out ... /document-revision/list"; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Oracle 11g connection reset error

Am seeing the below error while trying to connect to Oracle 11g on Red Hat Linux, 64-bit using ... T4CConnection.logon(T4CConnection.java:366) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - using spring-ldap with ssl

I need to talk to an LDAP server via spring-ldap with SSL, and the other end has a self-signed ... some instructions for setting this up? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Selenium Page Object Reuse

I really like how selenium 2 by convention pushes you towards using PageObjects as POJOs, and then simply using the ... .findElement(by); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get database connection from a connection pool

I am refactoring others code. The one thing I notice is that of the manner on how the system is getting a ... I think that is not optimal. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I implement Basic Authentication with JWT authentication in Spring Boot?

I have built a Spring-Boot application that works with jwt authentication. <?xml version="1.0" encoding="UTF-8 ... this.password = password; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring MVC pass same object between controller

In Spring MVC how do I pass an object between two controller methods? I have an update form and an ... many employees in a session. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - charAt() or substring? Which is faster?

I want to go through each character in a String and pass each character of the String as a String to another ... be faster or more efficient? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Eureka service discovery without Spring-boot

I have written a spring boot micro-service and a REST client. The client is a part of another module ... client without using the annotations ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Pass variables between renderer and another class with queueEvent()

I want to pass my renderer some values from another class. After the renderer has calculated the values, I have a ... d be happy to hear him. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - onPageFinished not firing correctly when rendering web page

For some reason the onPageFinished is firing before the WebView has finished loading - I can't figure out why ... have any experience with this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - The Old "@Transactional from within the same class" Situation

Synopsis of the original question: Using standard Spring Transactions with AOP proxying, it is not possible to ... the application context file. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SAX vs XmlTextReader - SAX in C#

I am attempting to read a large XML document and I wanted to do it in chunks vs XmlDocument's way of reading ... it. I am looking for specifics. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SWIG: How to wrap std::string& (std::string passed by reference)

I am using SWIG to access C++ code from Java. What is the easiest way to expose a std::string ... interested in hearing about easy approaches. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Does jvm load all the classes mentioned by the classpath?

When we invoke java command with -cp command then we provide some directories and jar files. Does jvm load all ... up to load when required? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to get generated keys from JDBC batch insert in Oracle?

I am inserting many records using JDBC batch inserts. Is there any way to get the generated key for each ... result. Any other solutions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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188 views

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java - How to isolate your program from calls to a "bad" API?

When I developed a piece of (academic) software using Java, I was forced to use an API that was rather ... like a reliable approach either. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to change Ant compiler to JDK 1.6

I need to compile my source code to be compatible with jre 1.6. However, when I attempt to set the compiler ... and how might I do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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