java api

After the use of Zabbix for monitoring, often because of the requirements of the project, the need for Zabbix data, two times to share and develop. How to obtain data from Zabbix is a problem to be solved in this practice. There are two ways to Zabbix data sharing 1 through the database query, get the data. The premise is to have a deep understanding of the Zabbbix database model, and in a large number of monitoring, can not because the query affect the operation of Zabbix biological 2 through t

ElasticSearch JAVA API Official document: Https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-index.htmlFirst, generate JSONThe first step in creating an index is to convert the object to a JSON string. There are four ways to create JSON documents

data Type wrapper class I. OverviewJava provides a simple type of basic data for the data, as well as the corresponding wrapper class. With basic simple data types, you can improve the performance of your system and meet the needs of most applications. However, simple types do not have the attributes of an object and do not meet certain special requirements. For example, many of the methods of many classes in Java have parameter types that are objects

the comparer. Min Returns the smallest element in the stream according to the comparer. Of Returns a stream that has a value given. Reduce Use a unique ID and accumulator on the stream to perform the decrement operation. Sorted Returns a new stream that uses a natural sort. ToArray Returns an array containing all the elements of the stream. Some stream methods perform an intermediate procedur

only three methods in the iteration, one to judge, one to get, the last to delete, and no method to add. The iterator itself has limitations, and the iterator below has sub-interfaces, Listiterator list iterators.The sub-interface provides added methods, modifications, fetches, deletions, and judgments. How do I get a sub-interface object? There is another method in the list collection that is not described, that is, Listiterator (), which can be used to get a list iterator. This iterator, only

Apply for developer Permissions Step:1, Login Sina Weibo, click on the "Application" 2, click on the "Weibo development platform I also want to be a developer" 3, click on "My App", fill out "developer Information" 4, click "Create App", you will be developing the microblogging application, can be a computer client,　　 Weibo promotion, mobile phone client, etc. No personal website access, nor mobile phone development, to do a bi-set PC-side applet. 5, access to the app Key, app Secret6, download

. The advantage is that object appears, improve extensibility, but with the drawbacks, is to strong turn. Not strong turn can not be used.Now make some changes to the tool loaded with object in the program, make a change.Write the changes back and forth in a Java tool class, looking up and down. When writing a tool class, this is used to manipulate the object tool class, followed by which object you want to manipulate, not sure. It used to be an objec

Java's core API is very large, which gives developers a lot of convenience, often people have comments, Java makes programmers dull. But some content I think is must grasp, otherwise can not skillfully use Java, also will not use "just silly". 1, under the Java.lang package of more than 80% of the functions of the flexible use of the class. 2, Java.util package

Because the project needs to track the system information according to the log, easy to view the transmission data as well as the exception information, therefore intends to use the log4j to complete this log management function. Unfortunately, in the use of the log4j found in the printing of exception information, and can not be like a console to print out the information in the tracking stack stacktrace to the configuration file specified in the log file. May be my limited ability, online sear

> Tim pf towns $ Tim c Lavin tim sg Td>wigins + Tim SF First, initialize the builder: Searchrequestbuilder Sbuilder = Client.preparesearch ("Player"). Settypes ("Player");The following example illustrates the implementation methods of various aggregation operations, because in the ES API, the aggregation operation on many

Original intention and arrangement descriptionJava high concurrent Kill system API is a Java project from the online tutorial, and I am the first project to touch Java. Originally a C # code farm, the company plans to part of the business to Java, so I use business time to self-study

name from the configuration file at runtime. At this time, there is no way to hard encode new classname (), reflection is required to create this object. An example we often see in our life helps us to understand why we should use the reflection mechanism of Java: you enter a restaurant and you don't know how much the food they all have. So the first thing you do is "The waiter takes a menu" and points to the menu and says "I want this, I want it

Java 3D API official tutorial [translation 3] Branchgroup objects can all be compiled (Compiled ). Compiling a branchgroup can convert a branchgroup object and all its ancestors into a format that the Renderer can render more efficiently. We recommend that you compile a branchgroup object in the last step before it becomes a live object, and it is best to compile and insert all branchgroups in locale only o

The previous blog recorded how to write data to an index using the Java Call API, and how to search this time.First, prepare the data StringData1 = Jsonutil.model2json (NewBlog (1,"Introduction to Git","2016-06-19","The main difference between SVN and git ..."));StringData2 = Jsonutil.model2json (NewBlog (2,"Introduction and simple use of generics in Java","20

Spring-boot is currently the most popular Java Web Development scaffold, and more and more developers choose to build an enterprise-class RESTful API interface. These interfaces not only serve the traditional web-side (b/s), but also serve the mobile side. In the actual development process, these interfaces will also provide for the development of testing related to the White box test, then there is bound t

Java excel Workbook API1. int getNumberOfSheets ()Obtain the number of worksheets (Sheet) in the Workbook, for example: Jxl. Workbook rwb = jxl. Workbook. getWorkbook (new File (sourcefile ));Int sheets = rwb. getNumberOfSheets (); 2. Sheet [] getSheets () Returns an array of Worksheet (Sheet) objects in the Workbook, for example: Jxl. Workbook rwb = jxl. Workbook. getWorkbook (new File (sourcefile ));Sheet [] sheets = rwb. g

JAVA 46th-Other Object API (2) Date Class Calendar class (important), apidate Date class (important) During development, time is often displayed, so you must be familiar with the Date application. Conversion between date objects and millisecond values. Millisecond value-> Date object: 1.new Date (TimeMillis); 2. setTime () Therefore, you can use the Date object method to operate a certain year, month,

JAVA Excel API Learning case and javaexcelapi case Paste the code first, run it, check the effect, then take a look at the comments, and then look at the basics behind the code Create a new excel file and write data: Public static void myExcel2 () throws IOException, WriteException {WritableWorkbook wwb = Workbook. createWorkbook (new File ("F:" + File. separator + "myExcel1.xls"); // create a sheet entry

This article mainly introduces step 4 of java API development, custom menu and personalized menu implementation, interested friends can refer to this article for details on java API development step 4, custom menus and personalized menu implementation. interested friends can refer The following describes how to custom

1. Try the thrift Python/java as well as the HBase client API, with the following conclusions:the installation and release of 1.1 thrift may encounter unknown errors, and the version of Hbase.thrift is changing. The advantage code is simple and requires less content to package. 1.2 HBase Client API, requires a lot of jars, the release version of the capacity is a