java plotting library

Univocity-parsers is an open-source Java project. For csv/tsv/fixed-width text file parsing, it provides a rich and powerful function with the Simple API development interface. Further introductions will be made later.Unlike other analytic libraries, Univocity-parsers has designed a set of own architectures based on high performance and scalability. Based on this architecture, developers can build a new file parser.1. OverviewAs a

One, double hit open OpenProj.exe not respond to the solution:1) Modify the Openproj1.4.0.ini, change the maximum version=any to maximum version=1.7, save.2) then double-click on the OpenProj.exe, will pop up the path to select the JRE, select the directory of the native installation JRE (important: 32-bit JRE must be selected, and the Java version is below 1.8, the reason is explained below)Second, the error "Failed to load

Jackson's first programbefore entering the details of the Jackson Library, let's take a look at the application's operational capabilities. In this example, we create a student class. You will create a JSON string student's details and deserialize it into the student's object, and then serialize it to the JSON string. Create a c:\>jackson_workspace named Jacksontester in the Java class file. File: Jackson

Blog migration to: http://www.micmiu.com Following the introduction of a Japanese open source software (the software can only achieve QRCode) Original: Java implementation of two-dimensional code QRCode coding and decoding (http://sjsky.iteye.com/blog/1136934), today found another excellent open source weapon--zxing , it is more flexible and convenient, and can realize many coding formats. Full-Text catalog: Basic description of two-dimensional code

result set. SetSize (1000)//sets whether to sort by query matching. Setexplain (TRUE)///finally return to the search ring should be information. Execute (). Actionget (); Searchhits searchhits=response.gethits ();//System.out.println ("-----------------in [" +term+ "] Search for keywords [" +querystring +"]---------------------"); System.out.println (System.currenttimemillis ()-L); System.out.println ("co-match to:" +searchhits.gettotalhits () + "strip record!");

Java people should all know the Java Common Class library of Apache Commons, which, like the Guava and Commons, encapsulates a set of common libraries that are more powerful than those provided by the JDK itself. Now that we have such a powerful library, we have no need to reinvent the wheel. How to use this thing, loo

In project development, sometimes encounter with SSL security certificate import to deal with, how to import the certificate into Java cacerts Certificate library? In fact, it is very simple, the method is as follows:Every step: Go to a Web site at the beginning of a https://www.xxx.com, download the certificate you want to import.On the page, right-click >> properties >> Tap Certificates >>Then click on th

One, JNI Java tune C + + dynamic library function problem1. Multi-Parameter callback2. Parameter passing is garbledSecond, to solve1. Using the byte[] array in C + +, the generated header file will become the Jbytearray typeFor example, in Java parameters: Byte[]account, the parameters in the header file become Jbytearray account,After modifying the value of the

Gson This Java class library converts Java objects to JSON or converts JSON strings into an equal Java object. Gson supports arbitrary complex Java objects including objects that have no source code.Other JSON parsing libraries and Json-lib;jackson;com.alibaba.fastjson.Small

When you use a Web page to display a table, if you have too many rows, you sometimes need to divide them into many pages. And each row uses a different background color to facilitate the user to read. Or you might want to sort. While it's easy to implement the above features, using the Display tag library will greatly simplify development. It mimics the style of the Google,baidu page, dividing many rows of tables into individual pages and providing co

Java calls to dynamic-link library DLLs are: JNI (Java Native Interface), Jinvoke,jnative (Java to Native Interface), and JNI is a method provided by Java itself Jinvoke from where to know, as if still need to register to pay, 64-bit JDK, JIR environment can not run, in VMwa

In fact it is very simple, the method is as follows: Each step: Enter a https://www.xxx.com to start the site, the certificate to be imported to download over, Right >> properties >> Click "Certificate" on this page >> Click on the "Details" toggle bar above >> Then click the "Copy to File" button in the lower-right corner A Certificate Export Wizard dialog box pops up, and you can do it step-by-step by prompting. For example: Save As Abc.cer, put it under C disk Step two: How to impor

worth mentioning that the basic method of all parts of this class is thread-safe. This method is also referenced in a class of swing. ObjectInputStream, this class can be said to be more Implements two interfaces, Objectinut: Defines the types that can be read, Objectstreamconstants: Defines constants for reading file types, uses ReadObject to distinguish what type of object is read, and reads from serialized objects , it is necessary to judge what object is read by the f

Guava Chinese is pomegranate meaning, the project is a Google Open source project, contains a lot of Google Core Java Common library. 1. Fundamental tools [Basic utilities] Make it more comfortable to use the Java language 1.1 Using and avoiding null:null is ambiguous and can cause confusing mistakes, sometimes it makes people uncomfortable. Many guava tool clas

Jackson is a set of data processing library tools for the Java platform, and Jackson's main function is to provide JSON parsing and generation, and Jackson also provides additional class libraries to support the processing of Avro, CBOR, CSV, Smile, XML, and YAML, It's very powerful and it's great to work with JSON data in Java.The relevant sample code:{ "name" :{"First": "Joe", "Last": "Sixpack" } , "Ge

The Apache Crunch (incubator project) is a Java library based on Google's Flumejava library, which is used to create MapReduce pipelining. Similar to other high-level tools used to create mapreduce jobs, such as Apache Hive, Apache Pig, and cascading, Crunch provides a pattern library for common tasks such as connectin

");Instantiate a large number of floating-point BigDecimal j = new BigDecimal ("7654321");BigDecimal k = new BigDecimal ("1234567");System. out. println("i="+i);System. out. println("j="+J);System. out. println("k="+K);System. out. println("Addition"+j. Add(k));System. out. println("Subtraction"+j. Subtract(k));System. out. println("Multiplication"+j. Multiply(k));System. out. println("Division"+j. Divide(k));Bigdecimal[] result = J. Divideandremainder(k);//retention quotient and remainderSystem

() Select () Transform () Filter () Find () Collect () Foralldo () AddAll () Isequalcollection () Org.apache.commons.lang3.ArrayUtils. Contains () IsEmpty () Isnotempty () Add () Clone () AddAll () Subarray () IndexOf () Empty_object_array Empty_string_array Org.apache.commons.beanutils.PropertyUtils. GetProperty () SetProperty () Getpropertydescriptors () IsReadable () Copyproperties

Metrics is a Java library that can provide you with unmatched code-run insight. It was developed by Yammer to detect the health of back-end services on the JVM. Metrics provides a powerful toolset for measuring the behavior of key components in your production environment. Metrics provides a common set of modular libraries for support such as Guice,jetty,log4j,apache httpclient,ehcache,logback,spring, Als

Inkfish original, do not reprint commercial nature, reproduced please indicate the source (http://blog.csdn.net/inkfish). Compression is a common technique in programming, mostly for large file compression, data stream compression, and so on. In the Java class Library, the built-in jar, ZIP, GZIP, zlib, etc. support (see Java.util.zip, Java.util.jar package). In addition, the Org.apache.tools.tar, Org.apach