Java 归档 - Page 102 of 655

Java – the difference between using the exception class or FileNotFoundException class to catch exceptions

Just like I have these two scenarios, we must deal with FileNotFoundException Case 1: try { FileInputStream fi……

Java

2020-08-26

Java gives the wrong answer in computing

I want to do some calculations in Java, I know it's not so bad to do something in more steps, but why use additional t……

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

Java – static and non static overloads to each other

Are these two functions overloaded class yogi{ public static void fun(){ System.out.println("Fun"); } ……

Java

2020-08-26

Java – generics and inheritance?

See English answers > java: can't to generic list mylist 4 public static void main(String... args) { List<C……

Java

2020-08-26

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. 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

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 EE – reasons for different search results of the same elastic search query on two nodes

I have a two node elastic search setting. The same search query on one node leads to different results from the other ……

Java

2020-08-26

“Error response from daemon: 404 page not found” when using docker command

I encountered an error when I used the docker command Does anyone have a solution? Please help me solve this problem a……

Java

2020-08-26

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Java – the difference between using the exception class or FileNotFoundException class to catch exceptions

Java gives the wrong answer in computing

Java – slow initialization of large and small objects

How do java – lambda expressions work with predicate?

Java SWT makes label scrollable possible

Java – static and non static overloads to each other

Java – generics and inheritance?

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. 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

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 EE – reasons for different search results of the same elastic search query on two nodes

“Error response from daemon: 404 page not found” when using docker command

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