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Commons CLI API - Short Options
How to manage short options with Apache Commons CLI API? A short option is a single character option prefixed with "-". For example, "-h" is a short option. A short option can be managed with Apache Commons CLI API in 4 steps: 1. Define Options - A short option can be defined and added to the option...
2020-12-22, 586👍, 0💬

Maven Project Compilation Output
Where is the compilation output of my "hello" Maven project? I just finished the "mvn package" command. After fixing the JDK version issue in the pom.xml, you should run "mvn package" again to compile the "hello" project: C:\fyicenter&gt;cd hello C:\fyicenter\hello&gt;\fyi center\apache-maven...
2020-10-17, 579👍, 0💬

Commons CLI API - Long Options
How to manage long options with Apache Commons CLI API? A long option is a long keyword (multiple characters) option prefixed with "--". For example, "--help" is a long option. A long option is supported in Apache Commons CLI API as an alias of a short option. For example, "--help" is an alias of "-...
2020-12-22, 578👍, 0💬

"javap -v" - Verbose Mode
How to "javap" command use verbose mode to print additional information about the selected class. You can use the "-v" or "-verbose" option of the "javap" command to print additional information about the specified class bytecode. 1. Compile HelloWorldFrame.java used in the last tutorial into a byte...
2021-09-09, 567👍, 0💬

FAQ for Apache ZooKeeper
Where to find answers to frequently asked questions on Apache ZooKeeper library, zookeeper.jar? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team Apache ZooKeeper library, zookeeper.jar: Downloading and Reviewing zookeeper.jar What Is Apache ZooKeeper Down...
2021-07-11, 558👍, 0💬

"javap -v" - Major Version Code
How to use the major version code in the "javap" output to determine the Java version of a Java class bytecode. The bytecode of each Java class has a format version code called "major version" of 2 byres at byte offset 7. You can convert bytecode "major version" to the version of the Java environmen...
2021-09-09, 557👍, 0💬

Copy PDF Document with iText
How to copy PDF document using iText Java Library? Here is a tutorial for copying PDF document and update it's information using iText Java Library. 1. Create a Java file, PdfUpdate.java: /** * Copy PDF and update info */ import com.itextpdf.kernel.pdf.*; import java.io.*; public class PdfUpdate { p...
2021-11-13, 542👍, 0💬

Jackson Dataformat Extensions
What are Jackson Dataformat Extensions? If you only work with JSON messages, you just need to download 3 Jackson JAR files: jackson-core.jar, jackson-databind.jar and jackson-annotations.jar. But if you want to work with other types of messages, you need to download a Jackson Dataformat Extension th...
2022-03-29, 535👍, 0💬

jackson-mapper-asl-1.9.13.jar
Jackson is a fast, streaming, zero-dependency and open source JSON processor. It provides JSON parser/JSON generator as foundational building block; and adds a powerful Databinder (JSON&lt;-&gt;POJO) and Tree Model as optional add-on blocks. jackson-mapper-asl.jar is a high-performance data ...
2021-10-10, 528👍, 0💬

JAF 1.2.0 Java Source Code Files
JAF 1.2.0 Java Source Code Files are important if you want to compile them with different JDK releases. You can get JAF 1.2.0 Java Source Code Files from JAF GitHub Website in the "activation/src/main/java/" folder. You can also browse JAF 1.2.0 Client Source Code files below:   Or download all of t...
2023-01-06, 516👍, 0💬

com.fasterxml.jackson.databind.ObjectWriter Example
How to use com.fasterxml.jackson.databind .ObjectWriterclass? com.fasterxml.jackson.databind .ObjectWriterclass allows you to map a Java class object to a JSON message in a pretty format. Here is an example Java program, ObjectMapperWriter.java: // ObjectMapperWriter.java // Copyright (c) FYIcenter....
2021-08-11, 515👍, 0💬

Jackson Base Modules
What are Jackson Base Modules? Jackson base modules are considered foundational, building on core databind, but not including datatype or data format modules, or JAX-/Jakarta-RS providers. Not all "general" modules are included here; this grouping is to be used for more mature (and generally slower ...
2021-10-10, 514👍, 0💬

Download Rhino JavaScript rhino-Rhino1_7_14_Release.zip
How to download and install Rhino JavaScript rhino-Rhino1_7_14_Release.zip? If you want to try Rhino JavaScript Examples and Tools, you can follow this tutorial to download and install rhino-Rhino1_7_14_Release.zip: The Rhino JavaScript is a JavaScript engine written in Java. 1. Go to Rhino Website ...
2022-04-28, 513👍, 1💬

Using iText Library in Java Programs
Where to find answers to frequently asked questions on Using iText Library in Java Programs. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team on Using iText Library in Java Programs: Create PDF with iText Java Library Bullet List in PDF with iText Embed I...
2021-10-02, 513👍, 0💬

What Is Jackson
What is Jackson? Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java". More than that, Jackson is a suite of data-processing tools for Java (and the JVM platform), including the flagship streaming JSON parser / generator library, matching data-binding l...
2022-02-19, 512👍, 0💬

What Is JDK "javap" Command
What Is JDK "javap" Command? "javap" is a command line tool provided in JDK (Java Development Kit) to help you read Java bytecode class files and disassembles them into JVM (Java Virtual Machine) assembler instructions. "javap" command has the following syntax: Usage: javap &lt;options&gt; &...
2021-08-21, 512👍, 0💬

JarAnalyzer Error in Java 8+ JAR Files
Why am I getting an error from JarAnalyzer on JAR files generated by Java 8 and newer versions? If you are using the JarAnalyzer 1.2 to analyze JAR files generated by Java 8 and newer versions you will get the following error: &gt; java -version java version "15" 2020-09-15 Java(TM) SE Runtime E...
2021-07-01, 511👍, 0💬

Commons CLI API - Short Options Example
Where to get a Java example of managing short options with Commons CLI API? Here is good Java example of managing short options with Commons CLI API, ShortOptionTest.java: // Copyright (c) 2018 FYIcenter.com import org.apache.commons.cli.Options ;import org.apache.commons.cli.Command LineParser;impo...
2020-12-22, 510👍, 0💬

Downloading and Reviewing jackson-*.jar
Where to find answers to frequently asked questions on Downloading and Reviewing jackson-*.jar? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team on Downloading and Reviewing jackson-*.jar.: What Is Jackson Jackson Core Source Code Download and Install Jac...
2022-02-19, 509👍, 0💬

What Is Snappy-Java
What is Snappy-Java? Snappy-Java is a Java port of the "snappy", a fast C++ compresser/decompresser developed by Google. Main features of Snappy-Java: Fast compression/decompression tailored to 64-bit CPU architecture. JNI-based implementation to achieve comparable performance to the native C++ vers...
2021-08-01, 508👍, 0💬

Download Apache Ant Source Package
How to download Apache Ant Source Package? An Apache Ant Source Package is a compressed file that contains source code files of Apache Ant. It allows you to re-compile Apache Ant with different Java versions and environments. You can download the source package file for Apache Ant by clicking the do...
2021-07-10, 500👍, 0💬

"javap" - Dedault Output
What Is the default output of the "javap" Command? The default output of the "javap" command presents the interface information of the Java class stored in the given bytecode. 1. Create a Java class, HelloWorldFrame.java, with the following source code, import java.awt.Graphics; import javax.swing.J...
2021-08-21, 495👍, 0💬

Snappy-Java - Compresser and Decompresser
Where to find answers to frequently asked questions on Snappy-Java - Compresser and Decompresser? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team Snappy-Java - Compresser and Decompresser: Downloading and Reviewing snappy-java.jar What Is Snappy-Java Sna...
2021-08-11, 491👍, 0💬

SLF4J - Simple Logging Facade for Java
Where to find answers to frequently asked questions on SLF4J (Simple Logging Facade for Java) library? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com team on SLF4J (Simple Logging Facade for Java) library: Downloading and Reviewing SLF4J Packages What Is SLF...
2021-07-04, 491👍, 0💬

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