Java 归档 - Page 365 of 655

Java – how to display the drop-down menu of a command after clicking the command icon?

In the eclipse RCP application, I have a custom view and provide a drop-down command in the toolbar of the view: <m……

Java

2019-12-19

After adding its own interface, Java will throw notserializableexception

People, I'm sticking to the new android app I'm developing For the application (card game), I need to save some data I……

Java

2019-12-19

Java – how to use resteasy to implement OAuth 2.0 in Google App Engine?

I am developing Google App Engine rest service. I want to use OAuth 2.0 for authentication I add the following code to……

Java

2019-12-19

JPA: use @ generatedvalue on non ID columns

I try to stick to an entity with attributes I want to populate from the DB sequence I am using Oracle to create a sequ……

Java

2019-12-19

Java – FreeMarker, can I set the computer number format by default?

About FreeMarker, can you tell it to treat all numbers as "computers" by default? I tried to apply cfg.setSetting(Conf……

Java

2019-12-19

Java – eclipse shortcut for declaring variable names as method parameters

Suppose we have such a variable: byte[] someByteArray; And such a method prototype: public void someMethodRequiringStr……

Java

2019-12-19

Java – password protected applications in Tomcat

I am developing web applications using jsp servlet, and I use Tomcat 7.0 33 as a web container So my requirement is th……

Java

2019-12-19

Java – how to get entity size in gae / J?

The gae document mentions that the maximum entity size is 1MB Because I store a lot of data in entities, I want to kno……

Java

2019-12-19

Java – getting started with Oracle Database

I was assigned the task of making Java Web applications work with Oracle databases I don't know where to start I hope ……

Java

2019-12-19

Java – localize Jfilechooser “all files” string

I'm using Jfilechooser to develop a Java application where users can switch languages Locale.setDefault( Locale.ENGLIS……

Java

2019-12-19

Java – exceptionhandler in spring

import org.springframework.beans.TypeMismatchException; import org.springframework.beans.TypeMismatchException; import……

Java

2019-12-19

Java – spring JDBC declarative transaction management in karaf

I have a project module that is built as an OSGi package (spring DM) I can't set up declarative transactions. Someone ……

Java

2019-12-19

Java – check whether the object is an instance of list

I have an object that sometimes contains list < Object > I want to check it with instanceof, and if so, add some……

Java

2019-12-19

Java – JPA one-to-one relationship, where the entity may not exist

I have many to one mapping between two entities (A and B, and a B can be associated with many as). I need to be able t……

Java

2019-12-19

JNI returns the signal 7 function and tries to call Java from C

I want to make a call from C to Java I try to call a function to invert a bool value without parameters This is my C c……

Java

2019-12-19

java – Jongo vs(DBObject)JSON. parse

I try to find out the advantages of Jongo instead of simply using (dbobject) JSON Parse (...) unmarshalls the JSON com……

Java

2019-12-19

Avoid nesting if else / switches – Java

I'm reviewing some code (Java) and making changes according to the business logic flowchart The current code relies on……

Java

2019-12-19

Java – store data in memory

I have "table a" in the database, which contains three columns "col 1", "col 2" and "col 3", with about 1000000 (1 mil……

Java

2019-12-19

Java – the real advantage of the factory model

I've been using the factory model for a year Sometimes I just think the real advantage is clean code Let me explain, i……

Java

2019-12-19

Java is equivalent to Matlab’s’ EPS’ or numpy / Python’s’ spacing ‘function (floating point relative precision)

background Matlab's built-in EPS function [1] can take a value x and return "the positive distance from ABS (x) to the……

Java

2019-12-19

Javaw still creates a console window; Why?

See English answer > start a java program without the console6 java -jar Jython.jar init.py However, when I change ……

Java

2019-12-19

Java swing gridbaglayout panel resizing problem

I'm making a simple little swing application for a relative, but I'm having trouble animating it This is the descripti……

Java

2019-12-19

Connecting from Java to SQL server using JDBC (Windows authentication mode)

I need to use JDBC 4.0 to connect from Java to SQL Server 2008.0 Class.forName("com.microsoft.sqlserver.jdbc.sqlServer……

Java

2019-12-19

Java – when to call getpreferredscrollableviewportsize() when laying out JScrollPane?

To implement the scrollable interface, you need to implement the getpreferredscrollableviewportsize () method This usu……

Java

2019-12-19

Java – use ‘select’ tags and entities in thymeleaf

I am creating a form with a select tag as follows: <form th:object="${version}" method="post" class="form-horizonta……

Java

2019-12-19

Java – XY position of a certain Z depth

In processing (Java dialect), there are methods screenx, screeny (and screenz, but we'll skip it now) Suppose I have a……

Java

2019-12-19

Java – hibernate sqlfragment memory leak?

I deployed a simple webapp on the Tomcat server Webapp is a rest web service. Each web resource loads data from MySQL ……

Java

2019-12-19

java – ExecutorService. Submit (callable) returns a null value for the future object

I am using executorservice to generate threads that perform different tasks When submitting the (callable < T >)……

Java

2019-12-19

Java – regular expressions X and / or y

Consider the following regular expressions, where x and y are any regular expressions XY|YX|X|Y This regular expressio……

Java

2019-12-19

Java – how to use ebean to query tables with one to any and many to one relationships

I'm using play framework 2.1 0 and ebean, encountered a problem when querying the following scenarios listed below: I ……

Java

2019-12-19

Asynchronous I / O – Java

I've been looking for details about the benefits of asynchronous I / O in Java, especially from application stack desi……

Java

2019-12-19

The fastest way to query XML in Java

See English answer > efficient parser for large xmls4 DOM – XPath: this takes a lot of time, DocumentBuilderFactory……

Java

2019-12-19

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Java – how to display the drop-down menu of a command after clicking the command icon?

After adding its own interface, Java will throw notserializableexception

Java – how to use resteasy to implement OAuth 2.0 in Google App Engine?

JPA: use @ generatedvalue on non ID columns

Java – FreeMarker, can I set the computer number format by default?

Java – eclipse shortcut for declaring variable names as method parameters

Java – password protected applications in Tomcat

Java – how to get entity size in gae / J?

Java – getting started with Oracle Database

Java – localize Jfilechooser “all files” string

Java – exceptionhandler in spring

Java – spring JDBC declarative transaction management in karaf

Java – check whether the object is an instance of list

Java – JPA one-to-one relationship, where the entity may not exist

JNI returns the signal 7 function and tries to call Java from C

java – Jongo vs(DBObject)JSON. parse

Avoid nesting if else / switches – Java

Java – store data in memory

Java – the real advantage of the factory model

Java is equivalent to Matlab’s’ EPS’ or numpy / Python’s’ spacing ‘function (floating point relative precision)

Javaw still creates a console window; Why?

Java swing gridbaglayout panel resizing problem

Connecting from Java to SQL server using JDBC (Windows authentication mode)

Java – when to call getpreferredscrollableviewportsize() when laying out JScrollPane?

Java – use ‘select’ tags and entities in thymeleaf

Java – XY position of a certain Z depth

Java – hibernate sqlfragment memory leak?

java – ExecutorService. Submit (callable) returns a null value for the future object

Java – regular expressions X and / or y

Java – how to use ebean to query tables with one to any and many to one relationships

Asynchronous I / O – Java

The fastest way to query XML in Java

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