class file version 61.0 ), this version of the Java Runtime only recognizes class file versions up to 52.0

这个问题似乎是关于Java的版本兼容性的问题。根据错误提示，您的Java Runtime只识别52.0版本以下的类文件版本，但您试图运行的类文件版本为61.0。这可能是由于您的Java版本太老导致的。您可以尝试升级您的Java版本，以使其能够识别更高的类文件版本。或者，您也可以尝试使用更旧的Java编译器来编译您的源代码，以生成更旧版本的类文件。

相关问题

CommandLineUtils has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0

这个错误提示表明你使用的Java Runtime版本不支持编译CommandLineUtils类文件的版本。具体来说，你的Java Runtime版本只支持编译class文件版本号最高为52.0的类，而编译CommandLineUtils类需要更高版本的Java Runtime，其class文件版本号为61.0。

为了解决这个问题，你需要更新你的Java Runtime版本，以支持编译class文件版本号为61.0的类。你可以从Oracle官方网站下载最新的Java Runtime版本。同时，你也需要检查你的编译环境，确保使用的编译器版本与你的Java Runtime版本相匹配。

Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0

Java Runtime Environment (JRE) refers to the software environment that includes the Java Virtual Machine (JVM) and the necessary libraries for running Java applications. A class file is a compiled form of Java source code, containing bytecode, which can be executed by the JVM.

The "class file version 61.0" you mentioned does not seem to correspond to an official version number in the standard Java specification. Java class files have version numbers based on the Java platform version they were designed to work with, following a format like `major.minor`. For example, version 61.0 might be a custom or non-standard build, or it could indicate a modified version with custom extensions.

Java standard class file formats are defined up to version 55.0, corresponding to Java SE 8. Here's what you need to know about the standard class file formats:

- **Java SE 5**: Class file version 49.0
- **Java SE 6**: Class file version 50.0
- **Java SE 7**: Class file version 51.0
- **Java SE 8**: Class file version 52.0

If your JRE is limited to recognizing class files up to version 55.0, it means it may not support newer features introduced in later Java versions, and any application with a higher class file version may encounter issues or require a more recent JRE for proper execution.

Here are some related questions:

1. What are the main differences between Java versions regarding class file format changes?
2. Can you run Java SE 9 or later applications on a JRE with version 55.0?
3. How can one ensure compatibility between older and newer class files when deploying applications?