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

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

Java – how do I create daemon threads?

Can Java programmers manually create daemon threads? how? Solution java. lang.Thread. setDaemon(boolean) Note that if ……

Java

2020-02-13

Create a stand-alone Java websocket client endpoint?

I want to create a websocket endpoint client in Java (as pure as possible, no framework), but almost all the examples ……

Java

2020-02-13

Java – when I read an image, the source raster array and the source color space component do not match

See English answers > illegalargumentexception: numbers of source raster bands and source color space components do……

Java

2020-02-13

Why does the nullprintstream() function in Java / Lang / system compare currenttimemillis() to zero?

When loading the system class, the < clinit > method instantiates the in, out and err printstream variables with……

Java

2020-02-13

Java – the best way to find the date closest to the target in the date list?

I have a list of date objects and a target date I want to find the date closest to the target date in the list, but on……

Java

2020-02-13

Java – in Null pointer exception on setonclicklistener

I have a problem clicking the login mode submit button of the listener This is a mistake Caused by: java.lang.NullPoin……

Java

2020-02-13

Do characters have intrinsic int values in Java?

Why does this code print 97? I haven't assigned 97 to 'a' anywhere else in my code before public static void permutati……

Java

2020-02-13

How to limit the number of entries in a Java hash table?

Is there a technique so that I can specify a number n so that when inserting the (N1) th entry, the oldest entry is de……

Java

2020-02-13

Java EE enterprise applications: some actions for deployment / startup

See English answer > using special auto start servlet to initialize on startup and share application data1 thank yo……

Java

2020-02-13

Java – how to get the ID of automatic increment when I insert a record in the table through JDBC template

private void insertIntoMyTable (Myclass m) { private void insertIntoMyTable (Myclass m) { String query = "INSERT I……

Java

2020-02-13