Eclipse:导出要在较旧的JRE上执行的Runnable JAR文件 [英] Eclipse: export a Runnable JAR file to be executed on an older JRE

问题描述

到目前为止，从Eclipse导出Runnable JAR文件是从另一台计算机上的命令行启动Eclipse项目的最快方法. 查看此答案.

Exporting a Runnable JAR file from Eclipse is by far the quickest way to launch an Eclipse project from command line on another machine. See this answer.

一个问题是，如果要运行的计算机上安装的JRE早于Eclipse使用的JDK，则会出现此错误:

A problem is that if the JRE installed on the machine you want to run from is older than the JDK used by Eclipse, you get this error:

java.lang.UnsupportedClassVersionError: test_hello_world : Unsupported major.minor version 51.0

我知道在Eclipse上我可以以较低的遵从性级别构建项目(例如，用1.6代替1.7)，但这似乎不会影响导出的JAR文件.

I know that on Eclipse I can build the project with a lower compliance level (e.g., 1.6 instead of 1.7), but this does not seem to affect an exported JAR file.

关于如何导出要在较旧的JRE上执行的Runnable JAR文件的任何想法?

Any idea on how to export a Runnable JAR file to be executed on an older JRE?

推荐答案

此过程似乎对我有用(我已使用Java 1.2和Eclipse Juno进行了测试):

This procedure seems to work for me (I tested with Java 1.2 and Eclipse Juno):

• 创建一个新项目.
• 将执行环境设置为J2SE-1.2.
• 创建一个主类，该主类将一行输出到System.out.
• 运行项目.
• 导出可运行的jar.
• 在JRE 1.2中运行jar.

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