Recent questions tagged java

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java - How to add certificate chain to keystore?

I have file with chain of certificates - certificate.cer: subject=/C... issuer=/C=US/O=VeriSign, Inc.. ... storepass <mypasswd> -alias "myalias" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I check if two ArrayList differ, I don't care what's changed

How can I check if two ArrayLists differ from one another? I don't care what's the difference, I just want to ... to implement equals() on it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Getting "Deadlock found when trying to get lock; try restarting transaction"

My Application(java spring-core) has several threads running concurrently and accessing db, I am getting exception ... : Exception handling } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Volley RequestQueue Timeout

RequestQueue mRequestQueue = Volley.newRequestQueue(getApplicationContext()); mRequestQueue.add(new JsonObjectRequest(Method.GET, ... anyway ?? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Hibernate Delete query

When I try to delete an entry from a db, using session.delete(object) then I can the following: 1) If the ... ="COUNTRY"></property> </class> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Easy way to keeping angles between -179 and 180 degrees

Is there an easy way to convert an angle (in degrees) to be between -179 and 180? I'm sure I could ... static method for the conversion for now. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - passing list to IN clause in HQL or SQL?

I get List<Strings> by executing a query. This must be passed to another query of IN clause values. How to ... String form to the IN clause. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - connect failed: ECONNREFUSED

I am developing one app, and what I think I wanna do is receive data from server database in android. ... Servlet - Developed in NetBeans See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How set up Spring Boot to run HTTPS / HTTP ports

Spring boot have some properties to config web port and SSL settings, but once a SSL certificate is set the http ... . I'd appreciate any help! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Code to list all the entries in jndi on remote machine

Can any one tell or point me to code to list all the jndi entries in a remote machine See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Where does H2's Embedded Databases Store the data?

So I just recently started learning about how databases work, how to use SQL ect. and decided to start implementing ... did not exist. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to remove element from ArrayList by checking its value?

I have ArrayList, from which I want to remove an element which has particular value... for eg. ArrayList<String> ... ", that is second element? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why not have all the functions as virtual in C++?

I know that virtual functions have an overhead of dereferencing to call a method. But I guess with modern ... to know and summarize them. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android: ScrollView not scrolling with keyboard out

I've got a layout with some views, from which one is an EditText. The layout easily fits on one page, BUT, ... it does work? Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to start anonymous thread class

I have the following code snippet: public class A { public static void main(String[] arg) { new Thread() { ... an instance of the thread class? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What does the length attribute do when set on the @Column JPA annontation?

What exactly does setting the length on a column do in JPA? @Column(name = "middle_name", nullable = false, ... with in this case is Hibernate. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to remove a task from ScheduledExecutorService?

I have a ScheduledExecutorService that times a few different task periodically with scheduleAtFixedRate(Runnable, ... implement this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why does exist WeakHashMap, but absent WeakSet?

From J. Bloch A ... source of memory leaks is listeners ... The best way to ensure that callbacks ... in the Java Collections framework? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to explicitly obtain post data in Spring MVC?

Is there a way to obtain the post data itself? I know spring handles binding post data to java objects. But ... those values in my controller? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - "Could not find acceptable representation" using spring-boot-starter-web

I am trying to use spring-boot-starter-web to create a rest service serving up JSON representations of Java ... . Any help greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Guava equivalent for IOUtils.toString(InputStream)

Apache Commons IO has a nice convenience method IOUtils.toString() to read an InputStream to a String. Since I am ... is not an issue for me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - invalid target release: 1.7

I have seen similar questions, but haven't yet found the answer. Using maven compile, I get: [ERROR] Failed to ... Any idea what it could be? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Use Maven to trigger a wsgen & wsimport in a row, using wsdlLocation

I have hard times using maven to generate my web service client. So please refer to Creating a web- ... tricky configuration to achieve this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Recurring "PermGen" in Tomcat 6

I keep getting a "PermGen" error on my Tomcat 6 server. I know what application is causing the problem ... with the specific application? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to compare JSON documents and return the differences with Jackson or Gson?

I am using spring-boot to develop backend services. There is a scenario to compare 2-beans(one is the DB object ... be a great start for me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why Spring's jdbcTemplate.batchUpdate() so slow?

I'm trying to find the faster way to do batch insert. I tried to insert several batches with jdbcTemplate.update( ... this method in wrong way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Best practice for configuring Spring LdapTemplate via annotations instead of XML?

For a Spring Boot application, I successfully configured a Spring LdapTemplate using annotations, including the ... people; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to create a button in Libgdx?

I want to create a button that changes when the user hovers it, or clicking it. I created the following variable ... example code for a button. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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