Recent questions tagged JAVA

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java - System.arrayCopy() copies object or reference to object?

I am having a final class NameAndValue. I copied an array of NameAndValue objects using System.arrayCopy() and when ... does it get changed?? 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 - Implementing result paging in hibernate (getting total number of rows)

How do I implement paging in Hibernate? The Query objects has methods called setMaxResults and setFirstResult which are ... to 250 of xxx? 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 handle different data types with same attribute name with Gson?

I'm currently writing an RSS feed parser in Java utilizing Gson. I'm converting the RSS' XML into JSON, ... t find a readily available answer. 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 - ThreadLocal value access across different threads

Given that a ThreadLocal variable holds different values for different threads, is it possible to access the value of ... TLocWrapper () {} } 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 - Jsoup get redirected URL

I'm trying to fetch the actual(redirected) url from the one provided by a url shortener. Let's take twitter ... or strategy to achieve 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 - Autodiscover JAX-RS resources with CXF in a Spring application

Is it possible with Apache CXF (2.7.0) to automatically discover JAX-RS resources in the classpath? That ... the Spring XML configuration 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 - all gms/firebase libaries must use the exact same version. Found versions 15.1.0, 15.0.2, 15.0.1, 15.0.0.

Trying to implement Firebase in my project. Gradle file: apply plugin: 'com.android.application' android { ... dex 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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java - Lambda Expression and Variable Capture

Please explain to me how a lambda expression can use and modify instance variables of its enclosing class, but can ... in the context of scope. 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 - Can I Instantiate a class using the class object? What about Constructors?

I am storing a list of classes through (Classname.class) and would like to instantiate one? Is this possible? ... doesn't support a constructor? 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 component size with GridLayout? Is there a better way?

I am working on a larger GUI with Java and I am becoming angry on Layout Managers. I have a " ... LayoutManagers to handle this properly? See Question&Answers more detail:os...

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

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124 views

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java - Detecting out of memory errors

I would like to provide my system with a way of detecting whether out of memory exception has occurred or not. ... it? Any ideas are 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 - Why are the results of of str == str.intern() for these strings different?

public static void main(String[] args) { String str1 = new StringBuilder("计算机").append("软件").toString() ... . Why are the results different? 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 - Inferred wildcard generics in return type

Java can often infer generics based on the arguments (and even on the return type, in contrast to e.g. C#). Case ... , T2>(first, second); } } 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 - Create excel chart using Apache POI

I need to create excel sheet from my Java code which contains charts like Bar chart, Line Chart etc using the ... from POI library for Java? 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 - hibernate with c3p0: createClob() is not yet implemented

In my project I started to use c3p0 with hibernate for reconnecting to database as hibernate won't ... initializeService(AbstractServiceRegistryImpl.java:233) [hibernate-core-5.2....

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

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144 views

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java - Strange JIT pessimization of a loop idiom

While analyzing the results of a recent question here, I encountered a quite peculiar phenomenon: apparently an extra layer of ... : add edi,DWORD PTR [rbp+r14*4+0x44] 0x00000...

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

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java - Gson. Deserialize integers as integers and not as doubles

I have json object with arbitary values inside. And I want to deserialize it in a Map. Everything is ok except ... Integers and not as Doubles? 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 you get GSON to omit null or empty objects and empty arrays and lists?

I am using Gson and I am in a situation in which I have to shrink the size of certain Json strings. I ... that are empty to be skipped. See Question&Answers more detail:os...

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

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318 views

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java - JavaFX Freeze on Desktop.open(file), Desktop.browse(uri)

I'm running some code in Java on Ubuntu 12.04 LTS 64 Bit (with Gnome Shell), using Oracle JDK 1.8.0_05 via ... ){ System.out.println(e); } } 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 - Enclosing class vs Declaring class

Are there any circumstances in which Class.getDeclaringClass could give a different result from Class.getEnclosingClass? ... Main class Main See Question&Answers more detail:os...

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

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275 views

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java - Tomcat is not running even though JAVA_HOME path is correct

When I am trying to run tomcat using startup.bat I get the following error, The JAVA_HOME environment variable is ... ) but same error occurs. See Question&Answers more detail:os...

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

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106 views

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java - Android RelativeLayout change color onClick

How do i change the color of a Relative Layout i use as a clickable on Click like the normal Button? Like ... Inflate Exception... Any ideas? See Question&Answers more detail:os...

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

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440 views

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java - Setting JAVA_HOME for intelliJ?

So i decided to try the beta of android studio today, but it refuses to run on my 32-bit JRE. I can ... dir like eclipse does in its ini? See Question&Answers more detail:os...

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

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259 views

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java - Hibernate saves stale data with hibernate.jdbc.batch_versioned_data

Environment Hibernate 4.2 ojdbc6 - Oracle 11.2.0.3.0 JDBC 4.0 Oracle Database 11g The issue We ... version check has passed successfully? 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 - Working with 2 or more frames

I have about 3 frames in my java swing application. What it the correct way how to handle with these frames? ... ; is this the correct solution? See Question&Answers more detail:os...

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

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294 views

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java - Private method inlining

In the Scala immutable Vector code there is a comment that says: In principle, most members should be private. ... apply to Java as well? See Question&Answers more detail:os...

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

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478 views

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java - Android Bitmap/Canvas offset after scale

If I have a canvas, on which I draw a Bitmap like this: canvas.drawBitmap(bmLargeImage, srcRect, destRect, ... simple question, newbie 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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126 views

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java - Spring - Rewrite one URL to another

I have a Spring 2.5 application that contains a Flash banner. I don't have the source for the Flash component but it ... value=".jsp" /> </bean> See Question&Answers more detail:os...

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

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