Learn How to read a Properties File in maven with examples User property is: maven.compiler.source. On my machine I have two Java versions installed: (1.6 and 1.7 installed manually by me). Note that the source version must be equal to or less than the target version. ${project.build.testSourceDirectory} This represents by default the src/test/java folder. <plugin> If we want to use the Java 8 language features, the - source should be set to 1.8. ${project.build.testSourceDirectory} This represents by default the src/test/java folder. The -source argument for the Java compiler. 一、创建maven项目File -> New Module，进入创建项目窗口点击Next，填写GroupId、ArtifactId和Version接着下一步，这里需要注在Properties中添加一个参数 archetypeCatalog=internal，不加这个参数，在maven生成骨架的时候将会非常慢，有时候直接卡住。来自网上的解释：archetypeCata If you are using Higher version than Java 1.5, the version must be specified either using Maven project properties or by using Maven Compiler plugin. Specifying Java version in maven - differences between ... You can use further properties like the following: ${project.build.finalName} This is by default defined as ${project.artifactId}-${project.version}. For Java 8 and below : About the two other ways : valuing the maven.compiler.source / maven.compiler.target properties or using the maven-compiler-plugin, you can use one or the other. Setting the Java Version in Maven with system Java version ... How to set specific Java version to Maven? - Stack Overflow From Java 8 and earlier, there are two ways to set the Java compiler version in a Maven POM file: Via the Maven Java compiler properties. Maven- Set Java Version - Java Tutorials Springboot just configures a <java.version> property such that by changing this value , you are implicitly changing maven-compiler-plugin 's <source/> and <target/> to the same value as what specified in the <java.version>: Here's another example: <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>10</maven.compiler.target> </properties> This will generate the .class files compatible with Java 10, with source code compatible to Java 8. Set Version by Compiler Args. 2.1. You could define a custom property under <properties> and refer to it from your dependency. Preferred way is to place the property in parent pom (if exist and is a multi module project). 1 Answer1. You can also import a POM used expressly for dependency managment. That is the simplest approach. The import approach does not require the parent/child project relationships. We can set the Java compiler version through the maven.compiler.source and maven.compiler.target properties. The source and target options also accept 1.3, 1.4, 1.5, 5, 1.6, 6, 1.7, 7, 1.8 and 8. User property is: maven.compiler.source. Specify a JDK version Create a system.properties file if one does not already exist, specify the version, and commit it to git. However, if you browse the plugin's documentation site and look for the properties that can be used to configure the compile goal you'll notice there are two properties that control the source (maven.compiler.source) and target (maven.compiler.target) values. org.apache.maven.plugins maven-compiler-plugin 3.8.0. 1.8 1.8. The file's contents should look something like this: java.runtime.version=11 Then add the file to Git by running: Default value is: 1.6. The -target argument for the Java compiler. Setting the -source and -target of the Java Compiler. Default value is: 1.6. For example, if you want to use the Java 8 language features ( -source 1.8) and also want the compiled classes to be compatible with JVM 1.8 ( -target 1.8 ), you can either add the two following properties, which are the default property names for the plugin parameters: <project> [.] Use the Compiler Plugin We can specify the desired Java version in the compiler plugin. Here's another example: 1 2 3 4 It is instead used by Spring Boot (see Specifying java version in maven - differences between properties and compiler plugin for a related discussion). 1.8 1.8. properties file in the maven project folder src/main/resources. Hi, I am using java8 , maven 3.5.2 version and using below configuration in pom.xml for compile java. Set version using plugin We can set the Java version by configuring the release option of the Plugin. This represents by default the src/main/java folder. <properties> <maven.compiler.release>9</maven.compiler.release> </properties> 4.2. Set Version by Compiler Args. Conclusion. We can set the Java compiler version through the maven.compiler.release. Question: Showing two versions like 49, 52 when I check java major version using javap. We can also set the Java version using the source and target configuration options of Maven Compiler Plugin: Similar to the previous example, we're setting the Java version to Java 8. Supported version are described in the Java Support article. 3.1. Sometimes when you may need to compile a certain project to a different version than what you are currently using. I need both of them for different projects. properties file in the maven project folder src/main/resources. The first way ( <java.version>) is allowed only if you use Spring Boot. 2.3. this broke more than expected, which is why those two versions are not recommended, 2.2.1 being the recommended 2.x version. The first option is setting the version in compiler plugin properties: The Maven compiler accepts this command with - target and - source versions. The -target argument for the Java compiler. org.apache.maven.plugins maven-compiler-plugin 3.8.0. Compiler Plugin The first option is setting the version in compiler plugin properties: <properties> <maven.compiler.target> 1.8 </maven.compiler.target> <maven.compiler.source> 1.8 </maven.compiler.source> </properties> The first way ( <java.version>) is allowed only if you use Spring Boot. Both of these methods to set the Java compiler version in Maven will be explained in the following sections. You should not need to mention the maven-compiler-plugin in your POM file, if you only want to specify the compiler version. We can then read that file at runtime to get the values. ${project.version} Maven Java Compiler Properties The first, newest and easiest way to set the Java compiler version in your Maven POM file, is via the Maven Java compiler properties. target. The javac can accept such command using -source and -target.The Compiler Plugin can also be configured to provide these options during compilation. Via the Maven Java compiler plugin. Setting java.version in the POM <properties> section does not change the Java version used to compile with the maven-compiler-plugin. 5. in maven 2.1.0 and/or 2.2.0 an attempt was made to deploy poms with resolved properties. Learn how to access Maven properties in Java. Note that the source version must be equal to or less than the target version. Also, for the compiled classes to be compatible with JVM 1.8, the - target value should be 1.8. It's equivalent to using the -source and -target flags of Java compiler ( javac program). ${project.version} Set version using properties. But for Maven I need 1.7, but my Maven uses the 1.6 Java versi. How to write properties in maven build Sometimes, We want to write a build number and timestamp to properties file during maven build time, and java reads and displays in UI to know the version. We can then read that file at runtime to get the values. Show activity on this post. Make sure your plugin version must be 3.6 or above. target. this broke more than expected, which is why those two versions are not recommended, 2.2.1 being the recommended 2.x version. Maven Java Compiler for Java 8 and Earlier. Maven will use the value (2.5) passed as an argument to replace the COMMON_VERSION_CMD property set in our pom.xml. This plugin will bind to the generate-resources phase and create a file containing the variables defined in our pom.xml during compilation. The -source argument for the Java compiler. Then Maven will instruct Java compiler to compile source code against Java version 1.8, and generate .class files compatible with Java 1.8 as well. The maven way is to use the element in a top level POM that includes the projects with common dependencies. For example, Let's create a version. jenv global oracle64-1.6.0.39 In this article, we looked at how to pass parameters to Maven from the command . The source and target options also accept 1.3, 1.4, 1.5, 5, 1.6, 6, 1.7, 7, 1.8 and 8. You can use further properties like the following: ${project.build.finalName} This is by default defined as ${project.artifactId}-${project.version}. This is not limited to the package command — we can pass arguments together with any Maven command , such as install, test, or build. This plugin will bind to the generate-resources phase and create a file containing the variables defined in our pom.xml during compilation. It changes nothing in the facts since finally the two solutions rely on the same . in maven 2.1.0 and/or 2.2.0 an attempt was made to deploy poms with resolved properties. Requesting you to suggest me what could be the wrong? 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