Java 归档 - Page 323 of 655

Java – how to select from HQL

I am a novice to HQL and have an SQL expression that I need to convert, but I cannot select an SQL statement: select S……

Java

2020-02-10

Java – how to install the Tomcat plug-in in eclipse

I use eclipse as my SDK for web project, and I need Tomcat integration with eclipse I'm on my Ubuntu machine How do I ……

Java

2020-02-10

Using multiple consecutive commas to separate strings in Java

See English answers > how to split a comma delimited string into an array of empty strings1 String abc = "a,b,c,d,"……

Java

2020-02-10

Java – image rotation

I tried to rotate the image I use this java code: BufferedImage oldImage = ImageIO.read(new FileInputStream("C:\\works……

Java

2020-02-10

Java – how does this division approximation using displacement operations work?

In Java util. In dualpivotquicksort, the following line of code appears: // Inexpensive approximation of length / 7 in……

Java

2020-02-10

Java Generator for Poisson and Uniform Distributions？

According to my understanding, the standard generator is used for normal distribution I have to generate random number……

Java

2020-02-10

Help is needed to find the vid / PID of the USB driver connected to the system through Java code

I need to find the supplier ID and product ID of the USB driver connected to the system through Java code. Any suggest……

Java

2020-02-10

Java – servlet forward response caller / previous page

I tried to forward the servlet response to the same page it came from (a.k.a: Previous page, or "servlet" caller) I've……

Java

2020-02-10

Java – can I select null as the column value in the HQL query?

I need a list of three columns Columns 1 and 3 have values, while column 2 is empty I need something like this: select……

Java

2020-02-10

Java – compilation failed; For more information, see compiler error output

When I try to compile build XML file, the following error is: BUILD Failed C:\Users\workspace\testrepo\src\build.xml:3……

Java

2020-02-10

Java – change JSP button click

I have a question I have three JSP pages The first is a menu with two buttons When I click the first button, I want to……

Java

2020-02-10

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

An example of grouping function of java8 stream

preface Recently, I encountered a problem in project development. According to business requirements, The parameters s……

Java

2020-02-09

java. util. Date and Java sql. The difference and mutual transformation of date

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

Java

2020-02-09

Java implementation of the boleifei cryptographic algorithm example code

1、 Algorithm description Polefeigh cipher is a symmetric cipher, which is the first encryption method with double let……

Java

2020-02-09

Using Java awt. Robot can grab the screen

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

Java

2020-02-09

Implementation method example of defining pointcuts in spring AOP

This article describes the implementation method of defining pointcuts in spring AOP. Share with you for your referenc……

Java

2020-02-09

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Java – how to select from HQL

Java – how to install the Tomcat plug-in in eclipse

Using multiple consecutive commas to separate strings in Java

Java – image rotation

Java – how does this division approximation using displacement operations work?

Java Generator for Poisson and Uniform Distributions？

Help is needed to find the vid / PID of the USB driver connected to the system through Java code

Java – servlet forward response caller / previous page

Java – can I select null as the column value in the HQL query?

Java – compilation failed; For more information, see compiler error output

Java – change JSP button click

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?

An example of grouping function of java8 stream

java. util. Date and Java sql. The difference and mutual transformation of date

Java implementation of the boleifei cryptographic algorithm example code

Using Java awt. Robot can grab the screen

Implementation method example of defining pointcuts in spring AOP

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