Recent questions tagged JAVA

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java - HashMap vs LinkedHashMap performance in iteration over values()

Is there any performance difference between HashMap and LinkedHashMap for traversal through values() function? 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 - Including local jar file in project at build time using gradle

I want to include enterprise.jar file of salesforce in my project at build time using gradle Could anyone help ... folder in my project. 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 - Moving focus from JTextArea using tab key

As stated, I want to change the default TAB behaviour within a JTextArea (so that it acts like a JTextField or ... ) in place of transferFocus() 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 a library for reading maven2/3 pom xml files?

I would like to read a pom.xml in Java code. I wonder if there is a library for that, so I can have an ... to avoid to build a parser by hand. 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 - Static block is not being called

Who can explain what's going on? public class MagicFinal { public static void main(String[] args) { System.out ... as in String situation. Why? 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 - ant task to remove files from a jar

How to write an ant task that removes files from a previously compiled JAR? Let's say the files in my JAR ... Class1 aaa/bbb/ccc/Class2 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 - Javah tool error: Could not find class file for hellojni

I am trying to create a header file using javah tool from command line on windows 7 OS but i am failing all ... but not getting any header 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 - Spring 3.1 WebApplicationInitializer & Embedded Jetty 8 AnnotationConfiguration

I'm trying to create a simple webapp without any XML configuration using Spring 3.1 and an embedded Jetty 8 server. However, ... 8.1.7 STS 3.1.0 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 does Thread implement Runnable?

A Java Thread's run() method is called by the JVM, on that thread, when the thread starts. To give a ... Runnable that I'm not seeing? 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 new Test() and new Test() { }

What is the difference between these two ways of instantiating new objects of a class as follows: Test t1=new Test(); Test ... x+" "t2.x); } } 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 - Uses-Permission vs Uses-Feature

I've seen many specific cases of people asking and people explaining the difference between the two but I can't ... Does one imply the 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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java - Reading files with Intellij idea IDE

I am a long time eclipse user and I have started to play around with IntelliJ IDEA. So from my understanding, ... /workspace if it is helpful: 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 have "&" i.e and symbol in Android TextView

I want to have some simple text in textView.. Like...(android & java) means I exactly require "and" symbol ... have them in our TextView text. 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 - Creating a read-only repository with SpringData

Is it possible to create read-only repositories using Spring Data? I have some entities linked to views and some ... save/flush/delete } 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 change the position of My Location Button in Google Maps using android studio

I am working on google maps, and I need to change position of My Location(current location button). ... ; googleMap.setMyLocationEnabled(true); 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 - Download file with original file name

In my project I am uploading a file. While uploading, I am saving its original file name and extension in a ... } Is this code is perfect? 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 interrupt ExecutorService's threads

When using the ExecutorService returned by Executors.newSingleThreadExecutor(), how do I interrupt 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 - Where to put text files in directory in Android

I have a text file i want to include in my Android application, it is not a string file it is ... relevant answers are welcome and 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 do I set Layout and Text size to DP inside program?

Basically I have this inside XML, but I have to recreate it inside a code. How do I do it? <EditText ... function to convert DP into pixel? 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 - Method injection using Dagger 2

I haven't managed to find a good explanation/example on method injection using Dagger 2. Could someone please ... which dinner is which? 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 set the -Xmx when start running a jar file?

As we know that we can set -Xmx1024M in window->preferences->java->installed jres->edit->default vm arguments in ... A.jar? Thanks a lot! 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 -XX:MaxRAMFraction=1 safe for production in a containered environment?

Java 8/9 brought support for -XX:+UseCGroupMemoryLimitForHeap (with -XX:+UnlockExperimentalVMOptions). This sets -XX:MaxRAM ... -Xss and so on? 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 are public static final array a security hole?

Effective java says: // Potential security hole! static public final Thing[] VALUES = { ... }; Can somebody tell me what is the security hole? See Question&Answers more detail:os...

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

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579 views

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java - Netty- cannot access class jdk.internal.misc.Unsafe

When I upgraded the Java from 8 to 11, I got an error from Netty about the "jdk.internal.misc.Unsafe", the ... (App.java:41) [classes/:?] 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 - Extending AsyncTask<Void, Void, Void>

In my android app I am performing some operations in the doInBackground by extending AsyncTask<Void, Void, Void> ... return null; } } 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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288 views

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java - What is the difference between Socket and ServerSocket?

If Socket represents client side and ServerSocket represents server side, why Socket.read reads the data from server side ... clarify it to 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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341 views

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java - How to center a text using PDFBox

My question is very simple: how can I center a text on a PDF, using PDFBox? I don't know the string in ... of the PDF. Any help is welcome! 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 does "final" do if you place it before a variable?

Very basic question, but, what does "final" do if you place it before a variable such as below... final ... .myTextField); What does final do? See Question&Answers more detail:os...

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

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