Unsupported version number [55.0] (maximum 54.0, java 10)

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When you receive the error “unsupported version number [55.0] (maximum 54.0, java 10)”, it means that you are using a Java version that is not compatible with the specific software or application you are trying to run. The error message states that the maximum supported version is 54.0, which corresponds to Java 8, and you are using version 55.0, which is not supported.

To resolve this issue, you have a few options:

  1. Downgrade your Java version: In this case, you can uninstall the current Java version and install Java 8 (version 54.0) instead. Keep in mind that this might not always be feasible or recommended, especially if you require the latest features and updates provided in the newer Java versions.
  2. Upgrade the software/application: If the software/application you are using has been updated to support newer Java versions, you can check for updates and install the latest version. This would allow you to use Java 10, which is the version you currently have installed.
  3. Use a different version of Java: If downgrading or upgrading is not an option, you can try using a different version of Java that falls within the supported range. For example, if the maximum supported version is 54.0, you can try using Java 7 (version 51.0) or Java 6 (version 50.0).

Here’s an example to illustrate the issue: 

// Java code using features from Java 10
public class Example {
  public static void main(String[] args) {
    var name = "John";
    System.out.println("Hello, " + name + "!");
  }
}

In the above example, the code utilizes the ‘var’ keyword, which was introduced in Java 10. If you attempt to compile and run this code using a Java version lower than 10 (e.g., Java 8 with version number 54.0), you will encounter the mentioned error because the older version does not support the ‘var’ keyword.

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