VSCode Unbound classpath container JRE System Library [JavaSE-15]

Question

I have been programming a java project using JDK14 and VSCode. Recently JDK15 is available, and I switched to the JDK. As for configuration, I pointed the VScode java.home and system JAVA_HOME to the new JDK folder.

When I clear the VSCode cache and restart the IDE, I started receiving this error

{
"resource": "/E:/dev/java/challenges/",
"owner": "_generated_diagnostic_collection_name_#3",
"code": "963",
"severity": 8,
"message": "Unbound classpath container: 'JRE System Library [JavaSE-15]' in project 'challenges'",
"source": "Java",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 1
}

I have seen similar questions/answers, but none of them was directed to VSCode.

score 3 · Answer 1 · answered Mar 20 '21 at 13:39

3

https://stackoverflow.com/a/42525941/1005462 this one was helpfull;

replace : build block in POM to

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

answered Mar 20 '21 at 13:39

user1005462

158
2
7

this worked for me. thanks. But can you tell me why the built in template doesn't work? – Rajon Tanducar Aug 25 '22 at 02:42
maybe new java features not added to vscode yet – user1005462 Aug 26 '22 at 08:22

score 2 · Accepted Answer · answered Sep 21 '20 at 09:47

2

According to VsCode-Java in Twitter, JDK15 support won't be released until the end of September, and here is a github issue that's related to Java 15 not support.

answered Sep 21 '20 at 09:47

Molly Wang-MSFT

7,943
2
9
22

score 1 · Answer 3 · answered Dec 23 '22 at 02:16

I am new to building Java apps in VSCode. In my case, I was developing a microservice using Spring Boot. Here is what I've done to solve the issue ;

Make sure JAVA_HOME env variable is registered to the right path
Configured JDK path in java.jdt.ls.java.home to settings.json located inside .vscode. Here is my configuration.

{
    "java.configuration.updateBuildConfiguration": "automatic",
    "java.compile.nullAnalysis.mode": "automatic",
    "java.jdt.ls.java.home": "/Library/Java/JavaVirtualMachines/temurin-11.jdk/Contents/Home"
}

Restart the VSCode

VSCode Unbound classpath container JRE System Library [JavaSE-15]

3 Answers3