Java 归档 - Page 93 of 655

Generic producers and consumers in Java

I have this method to retrieve objects that are instances of a given class: public class UtilitiesClass { public ……

Java

2020-08-29

Java – why use superclass references for objects?

See English answers > What does it mean to "program to an interface"? 32 public class Musician { public void p……

Java

2020-08-29

Java version for PMD, findbugs and checkstyle

I need to use PMD, findbugs and checkstyle as development projects in eclipse Is java 6 sufficient to use these tools?……

Java

2020-08-29

Java – pass some JUnit tests

Is there a simple way to tell JUnit that you only need to pass a certain percentage or a certain number of tests? I ma……

Java

2020-08-29

The Java compareto() method returns ClassCastException

Suppose I have an employee base class and a manager subclass, which extends employee Now suppose I create an object x ……

Java

2020-08-29

Java – system Setout redirects back to standard output

System. Setout redirects standard output For example, FileOutputStream f = new FileOutputStream("file.txt"); Syste……

Java

2020-08-29

Can Java throw an empty reference to an exception?

See the English answer > why can I throw null in Java? 7 try { .... } catch (MyException e){ /*Can e be nul……

Java

2020-08-29

Java – libgdx actor draw overlay

I tried to override my player class, which extends the actor drawing method, but I received an error saying Why can't ……

Java

2020-08-29

Java – speaker recognition using marf

I am using marf (modular audio recognition framework) to recognize the sound of speakers But I don't get the correct r……

Java

2020-08-29

The lambda expression example does not work in Java 8

I'm trying to learn lambda expression in Java 8 I did install the Eclipse Plug-in and Java 8 SDK, but when I tried to ……

Java

2020-08-29

Java – comparable vs. comparable

I don't see any difference between this default sort method (from Java. Util. Collections) public static <T extends……

Java

2020-08-29

Java – exceptions to runtime optimization using openjpa MySQL

There must be many questions about this question. I have read some, but the answer is still not found I'm new to JPA. ……

Java

2020-08-29

Java – information about @ inject in CDI / weld and di / Guice

I tried to distinguish between (some) CDI and di About @ inject, CDI (jsr-299) only brings di (jsr-330). What is it? C……

Java

2020-08-29

Java – lists implementations that do not resolve casts

I created my own array - based list implementation, and it doesn't limit invalid parameters If I use cast to create my……

Java

2020-08-29

Time zone in Java – webapp

I want to know the best practices for dealing with time zones in web applications >When user1 adds a new date, it i……

Java

2020-08-29

What does the name of an object in Java mean (array, ArrayList)

See English answers > java arrays printing out weight numbers and text 10 ArrayList<Integer> myList = new Arr……

Java

2020-08-29

Java – constructor printwriter (bufferedwriter) undefined

I'm trying to create a report that I show syntax errors be used for: new PrintWriter(new BufferedWriter(new FileWriter……

Java

2020-08-29

Java – JPA and first level cache, what’s the point?

Entitymanager maintains the first level cache for retrieved objects, but if you want to have a thread safe application……

Java

2020-08-29

Java – call thread What kind of corruption may occur when the stop method is used?

See the English answer > thread Stop () – deprecated 4 I just don't quite understand What does an inconsistent stat……

Java

2020-08-29

Java – packed numeric array

I have a large array (~ 400.000.000 entries) with integers of {0,1,..., 8} At present, I use byte array and save 2 num……

Java

2020-08-29

Java – how to add data in a list item in Android

I am a new Android Developer I am developing a sample application I want to add some data to the object list My mainac……

Java

2020-08-29

Java – close a runnable joptionpane

I have this runnable window: EventQueue.invokelater(new Runnable(){ @Override public void run() { op =……

Java

2020-08-29

Java – runtimeException: the buffer is insufficient to hold pixels

I received a bitmap in the byte array through the socket, I read it, and then I want to set it to OS. In my applicatio……

Java

2020-08-29

Java – unrecognized propertyexception when reading yaml file

When using the dropwizard, My dropwizard service reads config YML file public void run() throws Exception { this.r……

Java

2020-08-29

Java – jformattedtextfield instead of jtextfield

What is the difference between jtextfield and jformattedtextfield in Java? Solution Jformattedtextfield differs from j……

Java

2020-08-29

Java – get the seed of the random object without passing in the seed?

Does a random object always contain a seed, even if it is not given one? If so, can you get this seed? Motivation: I w……

Java

2020-08-29

Java – move background image in swing

Hello, I'm a novice programmer. We have a project We created a simple racing game with a moving background, but I insi……

Java

2020-08-29

Java – quickfixj login problem

There are problems with quickfixj The problem is that I can't send the login message correctly In addition, it's hard ……

Java

2020-08-29

Missing instruction number in javap output

Whenever I try to understand the disassembly code of a compiled Java file, I wonder why some instruction numbers are m……

Java

2020-08-29

Using java to attach nodes to existing XML files

Hello, I'm looking for a solution to attach nodes in Java to existing XML files <data> <people> <pe……

Java

2020-08-29

Java – how do I move all even numbers to the front of an array?

Here are the questions – Given an array of integers as input, returns an array containing the same numbers as the inpu……

Java

2020-08-29

Java – why this swing error occurs when using repaint () instead of GetParent () repaint()？

This problem is based on the problem I came back with a simple swing dice program The original question I posted is he……

Java

2020-08-29

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Generic producers and consumers in Java

Java – why use superclass references for objects?

Java version for PMD, findbugs and checkstyle

Java – pass some JUnit tests

The Java compareto() method returns ClassCastException

Java – system Setout redirects back to standard output

Can Java throw an empty reference to an exception?

Java – libgdx actor draw overlay

Java – speaker recognition using marf

The lambda expression example does not work in Java 8

Java – comparable vs. comparable

Java – exceptions to runtime optimization using openjpa MySQL

Java – information about @ inject in CDI / weld and di / Guice

Java – lists implementations that do not resolve casts

Time zone in Java – webapp

What does the name of an object in Java mean (array, ArrayList)

Java – constructor printwriter (bufferedwriter) undefined

Java – JPA and first level cache, what’s the point?

Java – call thread What kind of corruption may occur when the stop method is used?

Java – packed numeric array

Java – how to add data in a list item in Android

Java – close a runnable joptionpane

Java – runtimeException: the buffer is insufficient to hold pixels

Java – unrecognized propertyexception when reading yaml file

Java – jformattedtextfield instead of jtextfield

Java – get the seed of the random object without passing in the seed?

Java – move background image in swing

Java – quickfixj login problem

Missing instruction number in javap output

Using java to attach nodes to existing XML files

Java – how do I move all even numbers to the front of an array?

Java – why this swing error occurs when using repaint () instead of GetParent () repaint()？

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