Recent questions tagged JAVA

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java - How to set the timezone region for JDBC Connection and avoid the SqlException timezone region not found?

I have the following problem trying to create a Connection object to handle the connection from a command line Java ... for my Connection? Tnx 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 combine two different length lists in kotlin?

I want to combine two different length lists. For example; val list1 = listOf(1,2,3,4,5) val list2 = listOf( ... ",4,5) Is there any suggestion? 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 - Is there any "PostConstruct" feature of lombok?

Is there a way that I can define a "PostConstruct" initialization method with lombok? @RequiredArgsConstructor(staticName = ... ); obj.start(); 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 - ClientProtocolException in httpClient.execute(httpget, responseHandler)

I am using the following code to request xml from a web server: HttpClient httpclient = new DefaultHttpClient() ... would be much appreciated. 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 - My subscriber's onNext and onComplete functions do not run when I call onNext within my FlowableOnSubscribe class

In an Android project that uses RxJava 2, I create a Flowable like this in the onCreate of my initial activity: ... What am I doing wrong here? 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 use a custom class in a TreeSet?

If I was using a Set similar to this: Set<node> s=new TreeSet<node>(); class node { private int x; private ... a TreeSet, would it also sort it? 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 - running hive 0.12 with error of slf4j

Logging initialized using configuration in jar:file:/usr/local/hive/lib/hive-common-0.12.0.jar!/hive- ... slf4j.impl.Log4jLoggerFactory] hive> 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 - Android get Serial Number

I am trying to get the device serial number programmatically. I have used the following line: Build.SERIAL Which ... in the correct direction? 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 - Tomcat - Understanding CredentialHandler

I need to use Container Managed Security and Authentication in my latest project. And I have a couple of ... other algorithms are available ? 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 - Datatype to store 20 digit number

I have a number of 20 digit, which datatype will support to store this number? I have tried long, double ... to Base36 to generate the barcode. 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 access shadowed Outer class variable from Inner class?

This is not straight forward question. In my case the outer class variable and the inner class setter method's ... argument the same name p ? 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 boot application won't run when trying to run from the jar file

I have a spring boot application which works fine when run through intellij. But when I run it from the jar I am ... ' defined in URL [jar:file:/home/mayooran/Projects/bus-r...

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

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java - InetAddress.getByName on Android

I do a: java.net.InetAddress serverAddr; try { serverAddr = java.net.InetAddress.getByName(Server.SERVERNAME); } catch ... int PROTOCOL = 68; } 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 - LinkedList : Collections.max() throwing NoSuchElementException

I am not iterating the LinkedList by any means like scanner or other methods, I am using Collections.max() to get maximum ... +" "+max2); } } } 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 - Why can't assign I <? extends Type> to <Type>?

The following statements: URLClassLoader ucl = (URLClassLoader) ClassLoader.getSystemClassLoader(); Class<URLClassLoader> uclc ... in generics. 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 - Measuring time differences using System.currentTimeMillis()

I have a simple java program, and I want to know the time difference between some set of operations. For ... is this mechanism not reliable? 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 - Android: When do classes get unloaded by the system?

This is a very weird problem. My app that runs just fine but somehow if I leave my phone for an hour or ... Magic phone running Android 1.6. 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 - Sort array of objects by one property of nested object

I need to compare an array of objects by one property of one of its objects property. I am doing : List<Sell> ... anyone know how to do? 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 I can use Gson in Retrofit library?

I used Retrofit for send request and receive the response in android but have problem when I want convert ... "total_results": 237415 } 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 - Prepared statement with dynamic where clause

I have a search page with multiple search criteria Employee Name Employee Id Date of joining Department etc User ... (without ORM frameworks) ? 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 - What is the difference between get() and addListenerForSingleValueEvent?

I see a lot of tutorials, documentation and questions about using the Firebase Realtime Database on Android talk ... from the database once? 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 - org.hibernate.MappingNotFoundException: resource: *hbm.xml not found

JBoss AS 7.0.1.Final, Hibernate 3. We have a MySQL datasource. I have mapping resources pointing to *hbm.xml ... ideas what's going on? 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 - To get all the keys in JSONObject into String array

I want to create a json object from existing json object. For this i want to get all the keys in ... want any default method if exists. 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 - Use dynamic R strings in Android

I'm having a problem using strings stored in my strings.xml, I have a wide list of strings stored there. They ... achieve this. Can you help me? 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 we have wrappers classes, why primitives are supported?

We have wrapper classes in java like Interger, Float.. why it is still supportng primitives which is ... fully object oriented language? 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 - Boxing with Arrays.asList()

In the following examples: class ZiggyTest2{ public static void main(String[] args){ int[] a = { 1, 2, 3 ... ints using Arrays.asList()? 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 - ClassCircularityError when running Tomcat 6 from Eclipse

I'm using Eclipse 3.5, with my Tomcat runtime set as Tomcat 6.0.26. My Java VM is JDK 1.6.17 (Mac OS ... this before and know how to fix 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 - JTextField in which the predefined text in not editable but other text can be appended to it?

While going through Java swing I faced this problem. I have a JTextField which has predefined and not editable ... this solution or any other? See Question&Answers more detail:os...

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

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