The default target bytecode version of idea creation project is 1.5

 Problem Description:

The default target bytecode version of idea creation project is 1.5

 

Manually change Project Settings => Modules ==>Language level to 8

Solution 1:

1) Manually change Project Settings => Modules ==>Language level to 8

 

2) Manually change the target bytecode version of Settings => Build, Execution, Deployment => Java Compiler to 1.8

)

3) After reimporting maven, the target bytecode version still changes to 1.5

Solution 2:

Add the following build in the pom file, but it still has no effect

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>
 

Solution 3:

Found that the parent is missing in pom.xml, the default target bytecode version is 1.5

 

After removing the comment, the target bytecode version becomes 1.8

Summary:
If no parent is added, idea will set the target bytecode version to 1.5 by default, and it will not change if you manually change it. The solution is to add parent