Maven is an online marketplace that makes it easy for consumers to shop for and access a wide range of products and services. It’s the first-ever global marketplace powered by blockchain, offering both buyers and sellers a decentralized platform to connect directly with each other without intermediaries.
The Maven Repository is the central repository for all Maven artifacts. It allows developers to easily share, download, and publish their projects.
We’ll go through how to specify a particular Java version in Maven setup in this short tutorial. You may tell Maven the Java compiler version to use in a few different ways. Let’s have a look at the most popular choices.
Version 1 of the compiler
If you don’t specify a compiler version explicitly in Maven, Maven will use the Java 1.5 compiler version.
Before we continue, let’s review how to compile java code using JDK with a particular compiler version.
2. Recognize how to compile Java code to a particular version
The -source, -target, and -bootclasspath parameters in the javac tool allow you to compile Java code to a particular version.
$ javac -source -help Ensure that the source code is compatible with the release -target. -bootclasspath generates class files for a particular VM version. Specify a different location for the bootstrap class files.
The -source option checks if the source code is compatible with the Java release version provided.
The -target option converts the source code to the version you provide.
Consider the following scenario: You have Java 8 installed on your computer, but you wish to compile source code in Java 1.6.
MyTest.java -source 1.6 -target 1.6 -bootclasspath ” percent JAVA HOME/jre/lib/rt.jar” $ javac MyTest.java -source 1.6 -target 1.6 -bootclasspath ” percent JAVA HOME/jre/lib/rt.jar”
If the source code is compatible with Java 1.6, the above command compiles the source code correctly. The source code does not compile properly to the target version if -bootclasspath is not specified.
2.2. The following procedure is effective till Java 8 is released. In Java 9, a new option -release was added to facilitate cross-compiler versions. Three of these options, -source, -target, and -bootclasspath, are replaced by the -release option.
To compile source code to a particular version, use the single option -release in Java 9 and later versions.
For instance, if you have JDK 11 installed on your computer, you may build against Java 8.
—release 8 javac MyTest.java
Let’s have a look at the maven configuration choices for setting the Java version.
3. Versions of Java before to 8
If you’re using a Java version higher than 1.5, you’ll need to specify it either via Maven project settings or using the Maven Compiler plugin.
3.1. Use properties to set the version.
The maven.compiler.source and maven.compiler.target attributes may be used to specify the Java compiler version. Only 1.3, 1.4, 1.5, 5, 1.6, 6, 1.7, 7, 1.8, or 8 are acceptable sources and targets.
3.2. Use the plugin to set the version.
We may also set the Java version using Compiler Plugin’s source and target configuration parameters. If the source and destination values aren’t specified, the plugin defaults to version 1.6.
org.apache.maven.plugins 3.8.1 1.8 1.8 maven-compiler-plugin
Versions of Java 9 and above
Source code for Java 9 and higher versions must be compatible with Java 1.5 or above. This indicates that javac -source does not support versions lower than 1.5. 1.6, 6, 1.7, 7, 1.8, or 8, 9, 10, 11, and 13 are valid Java versions to mention.
As previously mentioned, a new option -release replaces three of these -source, -target, and -bootclasspath in Java 9 to enable cross-compiler versions.
4.1. Use properties to set the version
The maven.compiler.release property may be used to provide the Java compiler version. Make sure your plugin is version 3.6 or above.
4.2. Use the plugin to set the version.
By setting the release option of the Plugin, we may specify the Java version.
org.apache.maven.plugins 3.8.1 maven-compiler-plugin 8
Additional compiler parameters (section 4.3)
To make newer versions of Java function, such as preview features, we may need to provide extra parameters to the compiler. The compilerArgs option allows us to provide extra arguments to the compiler.
org.apache.maven.plugins —enable-preview maven-compiler-plugin 3.8.1 15
5. Final thoughts
We learnt how to specify a particular Java version in Maven setup in this short tutorial.
You may also be interested in these Maven guides:
- Maven should be installed on Windows.
- Setup Maven on a Mac
- On Ubuntu, install Maven.
- Eclipse may be used to import a Maven project.
- Maven doesn’t run tests.
- Maven executes tests
- Run the Java main class using Maven.
- Document Maven
- java -bootclasspath java -bootclasspath java -bootclasspath
this advertisement should be reported
Maven is a Java-based open source build automation tool. It can be used to manage the entire software development lifecycle, from building and testing code, through deployment and release management. Reference: maven central.
Frequently Asked Questions
What is Maven in simple words?
Maven is a software development tool that uses the Java programming language and Apache Maven to manage complex projects.
Why is Maven so bad?
Maven is a highly intelligent question answering bot. If you ask me a question, I will give you a detailed answer.
Is Maven the same as Jenkins?
Maven is a software automation tool, while Jenkins is an open source continuous integration server.
- maven download
- maven dependency
- maven tutorial
- maven download for windows
- maven clinic