Recent questions tagged JAVA

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I have a form which fills some objects of a Collection. I had the collection implemented with a List (an ... objects in a Set. 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 - Inefficient use of string concatenation

I was creating a logger in my java-app (with NetBeans as IDE) when suddenly I saw a warning saying: " ... used the latter though. Cheers. 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 - Converting from Swing to JavaFX?

When converting a Swing project to a JavaFx project, which classes from JavaFx match up to the Swing classes? A ... , but a complete makeover. 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 will happen if we directly call run method?

I have a class "TestRunnable" which overrides run method by implementing Runnable. Running overridden run method, as follow ... t.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 - sorting string lengths using comparator

While trying to sort an array based on its element string lengths, I am struck with a compile error. I have ... any clues to solve the problem. 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 Studio Error: org.gradle.process.internal.ExecException

I am new to android development and have hit my first error and can't seem to get around it. I have ... in many tutorials. Appreciate the help. 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 - Serialize DOM to FileOutputStream using Xerces

I am using this link to generate XML file using DOM. It says that "Xerces parser is bundled with the JDK 1 ... .XMLSerializer; Why is it so? 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 - IdentityHashCode in HashMap's bucket

In the implementation details of HashMap, I can read: When using comparators on insertion, to keep a * total ... or this is normal behavior? 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 - Startup error of embedded ActiveMQ: Temporary Store limit is 51200 mb

I have a Spring web application which will send and listen on a standalone ActiveMQ. When I start the web ... me out of 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 - Getting error message with spring "cvc-elt.1: Cannot find the declaration of element 'beans'."

I'm trying to set up a simple spring application and I'm getting the below exception. This is being run standalone in ... " /> </bean> </beans> 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 - Concat an integer to a String - use String literal or primitive from performance and memory point of view?

Option 1: String newStr = someStr + 3 + "]"; Option 2: String newStr = someStr + "3" + "]"; ... the end time and calculate the difference) 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 - Sockets: BufferedOutputStream or just OutputStream?

In order to get the fastest transfer speeds over TCP in Java, which is better: Option A: InputStream in = socket. ... " is "java.net.Socket") 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 read a Thymeleaf template from DB in Thymeleaf 3.0.5?

We're upgrading from Thymeleaf 2.1 to 3.0.5. Our current set up (before upgrading) has many thymeleaf templates ... } Any help is 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 - how to passing list<> in bundle

I have the following code: List<ValueActivity> list = new ArrayList<ValueActivity>(); list = setList(); ... how getExtra in destination intent 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 - Bit wise shift operator with shift by negative number

I came across an interesting scenario, When working with bitwise shift operator. If the second operand is ... understand how this works? See Question&Answers more detail:os...

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

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441 views

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java - Retrofit: 500 internal server error

I have 500 internal server error, every time when i try to send POST request via Retrofit. When i sending ... request and response from Postman: 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 - Mocking a REST call with MockRestServiceServer

I'm trying to write a JUnit test case which tests a method in a helper class. The method calls an ... Thanks in advance for any assistance. 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 efficiently convert byte array to string

I have a byte array of 151 bytes which is typically a record, The record needs to inserted in to a oracle database. In ... (b,0,5)) to string . 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 - Difference between webEnvironment = RANDOM_PORT and webEnvironment = MOCK

I wrote spring boot integration test and it is working. Here is the test config: @RunWith(SpringRunner.class) ... RANDOM_PORT and when MOCK ? 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 - Maximum Length of Android versionName / versionCode (Manifest)

I am trying to find out the maximum length of both the android:versionName and android:versionCode attributes of ... certain rules in place? 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 - JAR hidden inside EXE?

Minecraft, a Java game, is free this weekend. The Windows version downloads as an exe file. I was curious what the ... it with my own JAR files? See Question&Answers more detail:os...

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

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436 views

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java - Convert integer minutes into String "hh:mm"

I need to convert minutes (defined as Integer) into the following String format "hh:mm" assuming that the startTime is " ... .concat(h+":"+m); 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 - Error :- Execution failed for task ':app:dexDebug' in android studio

I newly Android project started a new default project. Everytime I try to start the app this error occurs: build ... help me Thanks in advance, See Question&Answers more detail:os...

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

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370 views

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java - Guice + Tomcat potential memory leak

I have just started using Google Guice with my Tomcat webapp, and have noticed the following in the catalina.out ... and a filter. 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 do I remove some characters from my String

i want to remove all of the following chars from my string ">[],-" at the moment im doing this. but there must be a ... "").replace("]","").... 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 find array index of largest value?

The title above sums up my question, to clarify things an example is: array[0] = 1 array[1] = 3 array ... it contains the largest element 7. See Question&Answers more detail:os...

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

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282 views

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java - Unable to connect to the Eclipse Luna Market

I cant connect my Eclipse Luna distribution to the market for install Maven 2 pluggin. This my ... MarketplaceWizardCommand.java:254) at org.eclipse.jface.operation.ModalCo...

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

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java - What is the time complexity of constructing a PriorityQueue from a collection?

What is the complexity of Java's PriorityQueue constructor with a Collection? I used the constructor: PriorityQueue(Collection<? ... (n*log(n))? See Question&Answers more detail:os...

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

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