Java 归档 - Page 103 of 655

Creating named pipes in Java

I'm trying to create named pipes in Java I'm using Linux However, I encountered a problem writing to the pipeline File……

Java

2020-08-26

Reducing objects to maps using java 8 streams

If I had a similar course public class Property { private String id; private String key; private String va……

Java

2020-08-26

Java – first item name of JTable jcombobox error

I added a swing to a JTable JCombo@R_695_2419 @, but the tag of my first project was always javax swing. JCombo@R_695_……

Java

2020-08-26

Java – rise from preferencearag and preferencefragments using optionsitemselected

I'm having trouble using optionsitemselected when using Android studio's default set activity (extended appcompatprefe……

Java

2020-08-26

Java – try to draw a circle in libgdx

It's very basic, but I can't figure out what's wrong Basically, I want to draw a circle around an area of one of my ob……

Java

2020-08-26

How does this java code instantiate an abstract class?

I'm changing our Java class, and I notice the following line of code: OurClass<OurInterface1> ourClass = new Our……

Java

2020-08-26

Java – polymorphism, ArrayList and objects

This is a common problem I try to understand the concept of polymorphism when creating a valid program or at least one……

Java

2020-08-26

Java – allure: the environment files in the target folder are deleted on Maven clean How do I generate it at each build?

Description indicates that the environment XML is added to the allure results directory（ https://github.com/allure-fr……

Java

2020-08-26

Java – call mainactivity method (extend broadcast receiver) from other classes

I'm trying to call mainactivity's method display from another class (phonestatereceiver)_ notification. But got this e……

Java

2020-08-26

Java – slow initialization of large and small objects

I came across this case today. I want to know the reason behind this huge difference The first version initializes a 5……

Java

2020-08-26

How do java – lambda expressions work with predicate?

I need more explanation about lambda expressions‘ How does' p 'mean list < person >? Can you explain clearly? Li……

Java

2020-08-26

Java SWT makes label scrollable possible

I have a label in a group in SWT. If it contains many lines of text, I want it to scroll vertically Use SWT V_ It does……

Java

2020-08-26

Cannot instantiate a value of type java.util.linkedhashmap from a string value (‘{‘); there is no single string constructor / factory method

I have the following two classes: @JsonIgnoreProperties(ignoreUnkNown = true) public class ChangesJSON { @JsonPro……

Java

2020-08-26

Java – synchronized vs readwritelock performance

I try to prove that synchronized slows down when there are many readers and only a few authors Somehow, I proved the o……

Java

2020-08-26

Alternatives to Java applets

I'm going to write a simple program to graphically display my college students' course prerequisites (i.e. networks as……

Java

2020-08-26

Java – implement equals and hashcode for BST

This problem is a follow-up problem of implementing hashcode for a BST My question was hard to think of, so I got an a……

Java

2020-08-26

JavaFX – how to focus on one phase

My application has a main application stage from which a second window can be opened I just want to focus on one stage……

Java

2020-08-26

Java – how to unit test and simulate methods with files as parameters

I have a collectionobject class to create an ArrayList public class CollectionObject { private List<String>……

Java

2020-08-26

Java – how to determine whether the JRE is 32 / 64 bit from the folder structure / file

I have a JRE folder on windows Is there any way to determine whether the JRE is 32-bit or 64 bit by looking at the int……

Java

2020-08-26

JavaFX: null tableview message

I am developing a java project using eclipse, JavaFX and tableview My application has three languages to choose from. ……

Java

2020-08-26

Is java – volatile propagated to instance members?

Suppose you have some simple container declarations and instantiate them like this class Test { private volatile L……

Java

2020-08-26

JavaFX filteredlist, which filters based on the properties of the items in the list

I have a case where I need to filter an observablelist < item > based on some attributes of the item (that is, t……

Java

2020-08-26

Java – I need to insert randomly generated numbers into the array

I examined these questions carefully with similar words or intentions, but it seems that I can't find any questions th……

Java

2020-08-26

java. Lang. IllegalStateException: commit has been called

I tried the following code, try { final Activity activity = ctx; FragmentTransaction ft = activity.getFragment……

Java

2020-08-26

Java – mybatis uses XML configuration in spring to return large results

I need to dump data from tables in Oracle to elastic search (100 million records), package com.fudy.mapper; import jav……

Java

2020-08-26

Java – null pointer exception error, no obvious code error

I have a mistake here. I don't know where it comes from My java course for beginners is high school, so I don't have m……

Java

2020-08-26

Get the start time of the first 30 days in Java

I tried to get the current date and time for the first 30 days But it's nothing else new Date(System.currentTimeMillis……

Java

2020-08-26

Java hashcode () conflicts for objects that contain different but similar strings

When verifying the output data of the program, I determined that the hash codes of two different objects are the same ……

Java

2020-08-26

Java – spring boot gradle application on heroku: unable to access jarfile

I have a spring boot gradle app that I can run successfully on my computer: heroku local When I go, it can also be suc……

Java

2020-08-26

Multithreading – redis cluster in multithreading

I am currently using the redis cluster mode with three primary instances. I use jedis (Java client) in the listening s……

Java

2020-08-26

Java – why use factories instead of ‘new’?

I'm reading this book EMF: Eclipse modeling framework, which says: Why encourage the use of factories instead of new o……

Java

2020-08-26

Java – symbol error not found in CMD, but not in IDE

I'm trying to compile the following code (I need one of the two files to complete this job), but I encountered 2 error……

Java

2020-08-26

搜索内容

Creating named pipes in Java

Reducing objects to maps using java 8 streams

Java – first item name of JTable jcombobox error

Java – rise from preferencearag and preferencefragments using optionsitemselected

Java – try to draw a circle in libgdx

How does this java code instantiate an abstract class?

Java – polymorphism, ArrayList and objects

Java – allure: the environment files in the target folder are deleted on Maven clean How do I generate it at each build?

Java – call mainactivity method (extend broadcast receiver) from other classes

Java – slow initialization of large and small objects

How do java – lambda expressions work with predicate?

Java SWT makes label scrollable possible

Cannot instantiate a value of type java.util.linkedhashmap from a string value (‘{‘); there is no single string constructor / factory method

Java – synchronized vs readwritelock performance

Alternatives to Java applets

Java – implement equals and hashcode for BST

JavaFX – how to focus on one phase

Java – how to unit test and simulate methods with files as parameters

Java – how to determine whether the JRE is 32 / 64 bit from the folder structure / file

JavaFX: null tableview message

Is java – volatile propagated to instance members?

JavaFX filteredlist, which filters based on the properties of the items in the list

Java – I need to insert randomly generated numbers into the array

java. Lang. IllegalStateException: commit has been called

Java – mybatis uses XML configuration in spring to return large results

Java – null pointer exception error, no obvious code error

Get the start time of the first 30 days in Java

Java hashcode () conflicts for objects that contain different but similar strings

Java – spring boot gradle application on heroku: unable to access jarfile

Multithreading – redis cluster in multithreading

Java – why use factories instead of ‘new’?

Java – symbol error not found in CMD, but not in IDE

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