Java 归档 - Page 89 of 655

Java – Eclipse: get null display

I tried to pop up a dialog box (i.e. a FileDialog) in the Eclipse Plug-in. In fact, I was running the relevant UI laun……

Java

2020-08-30

Java – find friends of all users: how to implement Hadoop MapReduce?

Say I entered the following: (1,2)(2,1)(1,3)(3,4)(4,1) The output is expected to be as follows: (1,(2,3,4)) -> (1,3……

Java

2020-08-30

Can I construct arrays in Java without the number of elements?

There are some problems when using arrays in Java If I declare a character array like this, my program will throw an e……

Java

2020-08-30

Java generics copy constructor

I want to write a copy constructor for a commonly defined class I have an inner class node, which I use as a node of a……

Java

2020-08-30

Can ColdFusion CFC be instantiated from Java?

I know that a Java class can be instantiated from ColdFusion, but can ColdFusion CFC be instantiated from Java code? F……

Java

2020-08-30

Gets the value selected from the radio button in Java

import javax.swing.*; import javax.swing.*; import java.awt.*; public class RadioButtonTest extends JFrame { privat……

Java

2020-08-30

Java – traversal object array list

I am using native SQL to query with the following code private <T> List<T> executeNativeQuery(String query……

Java

2020-08-30

Java – why can’t I use multiple type parameters with wildcards?

For example, why can't I do this (I1 and I2 are two interfaces): List<? extends I1 & I2> myList; Note that I……

Java

2020-08-30

Java – changing the value of an array through methods in class

This is my code: class Myclass { private static int[] array; public static void main(String[] args) { ……

Java

2020-08-30

WinForms – why does mstest hang while waiting for windowsformssynchronizationcontext?

I have a custom windows forms control that contains mstest unit tests I added a @ r to this class_ 419_ 2271 @, I need……

Java

2020-08-30

Java compilation error: open enumeration

I encountered a very strange mistake and I couldn't figure out how to solve it Projects compiled well on Windows canno……

Java

2020-08-30

Java – object instantiation using factory methods

I am currently taking CS2 course (data structure), in which Java is the language used. I am interested in comparing an……

Java

2020-08-30

Java – download files using selenium

I'm using selenium to test the system My code is as follows: FirefoxProfile fxProfile = new FirefoxProfile(); fxProfil……

Java

2020-08-30

java. util. concurrent. ExecutionException：java. lang.OutOfMemoryError：PermGen space

everybody I encountered an exception while running the server. I think this is a memory leak! I tried a lot of paramet……

Java

2020-08-30

Java – unable to get unique list element

I tried to extract a unique element from the class list with the following format: [EntityClientPlayerMP['Player989'/2……

Java

2020-08-30

Java – can I use appium – webdriver to run applications from a laptop (MAC) on a real device (iPhone)?

I have implemented appium to run my test cases on the iPhone / iPad simulator Using the simulator: capabilities.setCap……

Java

2020-08-30

Java – how do I modify this program to use ArrayList?

First, the following is a description: As far as the code is concerned, I have completed all the contents required for……

Java

2020-08-30

Aggregate function on list in Java

I have a list of Java objects and I need to reduce it to apply aggregate functions, such as through database selection……

Java

2020-08-29

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

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Java – Eclipse: get null display

Java – find friends of all users: how to implement Hadoop MapReduce?

Can I construct arrays in Java without the number of elements?

Java generics copy constructor

Can ColdFusion CFC be instantiated from Java?

Gets the value selected from the radio button in Java

Java – traversal object array list

Java – why can’t I use multiple type parameters with wildcards?

Java – changing the value of an array through methods in class

WinForms – why does mstest hang while waiting for windowsformssynchronizationcontext?

Java compilation error: open enumeration

Java – object instantiation using factory methods

Java – download files using selenium

java. util. concurrent. ExecutionException：java. lang.OutOfMemoryError：PermGen space

Java – unable to get unique list element

Java – can I use appium – webdriver to run applications from a laptop (MAC) on a real device (iPhone)?

Java – how do I modify this program to use ArrayList?

Aggregate function on list in Java

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

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