Java 归档 - Page 323 of 655

Java – is there any special reason for eclipse generated equals to use the values of 1231 and 1237 as Boolean values?

The title basically explains everything I tried Google search, but returned a lot of false positives I think I just wa……

Java

2020-02-10

Java – are local variables in static methods also static?

I wonder if we declare them statically, all local variables will become static? For example: public static void A(){ ……

Java

2020-02-10

Strange floating point behavior in Java programs

See English answer > is floating point math broken? 29 0.0 + 0.04 = 0.04 0.04 + 0.04 = 0.08 0.08 + 0.04 = 0.12 0.12……

Java

2020-02-10

When reading from a file, Java net. URL cache

It seems that Java is saving some kind of cache for URLs (& files) new java.io.BufferedReader (new java.io.InputSt……

Java

2020-02-10

Java – zoneddatetime as pathvariable in spring rest requestmapping

I have a rest endpoint in my spring application, as shown below @RequestMapping(value="/customer/device/startDate/{sta……

Java

2020-02-10

Java – alternatives to Commons beautils

I am looking for an alternative to public beautils I want a small independent alternative that will lead to no / minim……

Java

2020-02-10

Java – get value from JTable cell

I listed editable columns in JTable When I finish editing the cell, I want the old value of a cell Solution You can ge……

Java

2020-02-10

Java – condition – should be unlocked before waiting?

Can you tell me if I should release the lock before waiting for the condition? try { lock.lock(); while (isNot……

Java

2020-02-10

Java – the correct way to find enumerations by value

I have several Java enumerations that look like the following (edit for confidentiality, etc.) public enum Presentatio……

Java

2020-02-10

What is the c# equivalent of Java’s class type?

In Java, it is convenient for class to use the generic parameter X But c#'s type class doesn't have this So in c#, how……

Java

2020-02-10

Java – check the current exception in the eclipse debugger?

If a Java application throws an unhandled exception, it will cause eclipse to break at that time Is there any way to c……

Java

2020-02-10

Interface array in Java

I have an interface a: interface A { } Then I have a level B: class B implements A { } Then I have a way to use the a ……

Java

2020-02-10

JavaFX listview multi selection

I want to select multiple items from listview It responds to mouse clicks I tried this: selectedLogsList.addAll(logsLi……

Java

2020-02-10

Java – can final be removed from the class definition for backward compatibility?

I am currently reading effective java written by Joshua Bloch. Item 17 is "inherit the design and documentation, or pr……

Java

2020-02-10

Java – use the slidinguppanel library to keep the bottom view

I used slidinguppanel Library in one of my media player applications In the slide panel, I have media controls. I want……

Java

2020-02-10

How is the following java code useful in autonomic computing?

In the book I'm learning, they show this java code: Class c = ClassLoader.getSystemClassLoader().loadClass(name); Clas……

Java

2020-02-10

Java – Common underflow and overflow exceptions

I tried to get an overflow and underflow exception in Java, but I couldn't get any beautiful tutorials Specifically, I……

Java

2020-02-10

Equivalent to akka, but Net (concurrency framework)

Is there the equivalent of akka Net? http://doc.akka.io/use-cases Solution You can have a look https://github.com/phat……

Java

2020-02-10

Java – how to define whether the determination point is in the area lat, long?

I have an area defined by a set of geographical locations. I need to know whether a coordinate is in this area public ……

Java

2020-02-10

Java – type prompt functions in clojure

I tried to solve the reflection warning in clojure, which seems to be due to the lack of type inference for the functi……

Java

2020-02-10

Java – what happens if the executorservice queue is full

I have a large file up to TB. My task is to process it line by line Each line should take 5 seconds to complete To imp……

Java

2020-02-10

What does colon mean in Java?

What does a colon mean in Java? I have this: public static List<String> findAllAnagrams(List<String> words……

Java

2020-02-10

Java – how to create a text field that only supports numbers in vaadin

I'm using vaadin text field. I want to limit it to numbers only I tried to override setValue () and return without cal……

Java

2020-02-10

What type of Java constructor call is this?

I've never encountered such a thing. I don't know this type of coding! DefaultHandler handler = new DefaultHandler() {……

Java

2020-02-10

Java – JPA last update timestamp

I'm playing JPA (eclipse link is specific) The following entities have one What is the policy for automatically updati……

Java

2020-02-10

How do negative operands of bitwise operators work in Java?

-4 & -5 = -8 // How? -4 & -5 = -8 // How? -4 & 5 = 4 // How? I need to explain how to achieve the above re……

Java

2020-02-10

Java – what is the appropriate way to handle warnings: “the expression of X is loaded into X”

I'm not going to close or ignore the expression of type X is boxed into x? Warnings in I wonder if the correct way to ……

Java

2020-02-10

Android get device information

Here is the programming house jb51 CC collects and arranges code fragments through the network. Programming house Xiao……

Java

2020-02-09

Spring + mybatis multi data source switching

Here is the programming house jb51 CC collects and arranges code fragments through the network. Programming house Xiao……

Java

2020-02-09

Generate and analyze QR code with zxing

Here is the programming house jb51 CC collects and arranges code fragments through the network. Programming house Xiao……

Java

2020-02-09

Java anonymous inner class instance code explanation

This article mainly introduces the detailed explanation of the Java anonymous internal class example code. The example……

Java

2020-02-09

Three methods of deleting Java list by traversal

This article mainly introduces three methods of Java list deletion by traversal. The example code is introduced in gre……

Java

2020-02-09

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Java – is there any special reason for eclipse generated equals to use the values of 1231 and 1237 as Boolean values?

Java – are local variables in static methods also static?

Strange floating point behavior in Java programs

When reading from a file, Java net. URL cache

Java – zoneddatetime as pathvariable in spring rest requestmapping

Java – alternatives to Commons beautils

Java – get value from JTable cell

Java – condition – should be unlocked before waiting?

Java – the correct way to find enumerations by value

What is the c# equivalent of Java’s class type?

Java – check the current exception in the eclipse debugger?

Interface array in Java

JavaFX listview multi selection

Java – can final be removed from the class definition for backward compatibility?

Java – use the slidinguppanel library to keep the bottom view

How is the following java code useful in autonomic computing?

Java – Common underflow and overflow exceptions

Equivalent to akka, but Net (concurrency framework)

Java – how to define whether the determination point is in the area lat, long?

Java – type prompt functions in clojure

Java – what happens if the executorservice queue is full

What does colon mean in Java?

Java – how to create a text field that only supports numbers in vaadin

What type of Java constructor call is this?

Java – JPA last update timestamp

How do negative operands of bitwise operators work in Java?

Java – what is the appropriate way to handle warnings: “the expression of X is loaded into X”

Android get device information

Spring + mybatis multi data source switching

Generate and analyze QR code with zxing

Java anonymous inner class instance code explanation

Three methods of deleting Java list by traversal

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