Java 归档 - Page 318 of 655

Java – r.loess and org apache. commons. The difference between math and loessinterpolator

I'm trying to use Apache commons. Math library to calculate and convert r script into Java script You can use org apac……

Java

2020-02-13

Where did ORM fail?

I often hear people attack ORM for lack of flexibility and "vulnerability abstraction", but you really don't know why ……

Java

2020-02-13

Java – what is the difference between a normal interface class and an abstract class with only abstract methods?

I'm just curious if they have any different treatment For example, if we have: Interface: public interface Test { ……

Java

2020-02-13

Java – Design of objects and static methods

As shown in the figure below, there are two simple ways to make the streaming copier (Introducing Apache commons or si……

Java

2020-02-13

. Net garbage collector

I've read a detailed article on the internal work of various garbage collectors in the JVM, but I'm finding it Net run……

Java

2020-02-13

Design using composition and interfaces in Java

I designed the following for a question: class Animal { // ... } class Guppy extends Animal { ... } class Pigeon exte……

Java

2020-02-13

Java – jax-ws, authentication and authorization – how?

What is the best way to authenticate and authorize in a web service? I am developing a set of Web services that requir……

Java

2020-02-13

Combining Java swing and java3d: concurrency performance issues

I combine swing with Java 3D The operation of swing component shall be completed using event scheduler thread, while t……

Java

2020-02-13

Java – spring 4 – find the interface org springframework. test. context. Testcontext, but the class is expected

I began to get "find the interface org. Springframework. Test. Context. Testcontext, but the class is expected". Sprin……

Java

2020-02-13

Java – decomposes int values into different numbers

I want to divide my int value into numbers For example, if not It's 542. The result should be 5,4,2 I have two options……

Java

2020-02-13

Java – r.loess and org apache. commons. The difference between math and loessinterpolator

I'm trying to use Apache commons. Math library to calculate and convert r script into Java script You can use org apac……

Java

2020-02-13

Java – simpledateformat cannot handle 12 months correctly

I'm trying to parse the string "2 / 20 / 2012 12:00:00 am" using simpledateformat. It seems that it will come out at 1……

Java

2020-02-13

Java: do sth in a period of time

I need a few lines of Java code to run x% at random Pseudo code: boolean x = true 10% of cases. if(x){ System.out.p……

Java

2020-02-13

How do I link two Java serialized objects together?

Sometimes (actually many), we get a Java case where two objects point to the same thing. Now, if we separate these ser……

Java

2020-02-13

How to write optimistic and pessimistic locking code from Java code

I know what optimistic and pessimistic locking are, but how do you do it when you write java code? Suppose I use Oracl……

Java

2020-02-13

Java – birt jdbcexception “unable to load jdbc driver class: com.mysql.jdbc.driver” upgraded from 2.6 to 3.7

I'm trying to upgrade my version of birt viewer on my Tomcat server, but it seems that I made an error while loading t……

Java

2020-02-13

Java TCP Socket Sniffing

I use TCP sockets to transfer data between the server and client programs using a specific port number on the same com……

Java

2020-02-13

Java – generationtarget encountered an exception to accept the command: error executing DDL through JDBC statement

I'm a novice in the hibernate world. In the face of, WARN: GenerationTarget encountered exception accepting command : ……

Java

2020-02-13

AspectJ: intercept method from external jar

I am using x.jar and adding it to my AspectJ project (in eclipse) I have written a pointcut and suggestion for the met……

Java

2020-02-13

Java – how to print two positions correctly using the zero padding flag in a print statement

What if you want to print with zero pad int month,day; public void printNumeric() { System.out.printf("month +"/" ……

Java

2020-02-13

java – Object. What is this farm by farm copy done by clone()?

In effective Java, the author points out that: What I want to know is his meaning of copying scene by scene Does this ……

Java

2020-02-13

Java – spring @ transactional annotation cannot use automatic wiring?

My application uses spring auto wiring to configure beans I just tried to add @ transactional, and it seems that I did……

Java

2020-02-13

Java – unable to parse org. XML eclipse. jdt. annotation. Nonnull type It is from what is needed Class file indirectly referenced

When I use the Java 8 method to reference the double colon operator (:) and the new operator (for example, mytype:: ne……

Java

2020-02-13

Extracting human voice from wav file using java

I'm working on a project where I have to use Java from audio Extract human voice from wav file Audio WAV files may hav……

Java

2020-02-13

Java – NullPointerException in iabhelper In querypurchases

Today, I found an application crash report for Android applications involving the following stack traces: java.lang.Nu……

Java

2020-02-13