可以编译 Java 8 代码以在 Java 7 JVM 上运行吗? [英] Can Java 8 code be compiled to run on Java 7 JVM?

问题描述

Java 8 引入了重要的新语言特性，例如 lambda 表达式.

Java 8 introduces important new language features such as lambda expressions.

语言的这些变化是否伴随着编译后的字节码的如此显着变化，从而阻止它在不使用一些逆向翻译器的情况下在 Java 7 虚拟机上运行?

Are these changes in the language accompanied by such significant changes in the compiled bytecode that would prevent it from being run on a Java 7 virtual machine without using some retrotranslator?

推荐答案

不，在源代码中使用 1.8 功能需要您面向 1.8 VM.我刚刚尝试了新的 Java 8 版本并尝试使用 -target 1.7 -source 1.8 进行编译，但编译器拒绝:

No, using 1.8 features in your source code requires you to target a 1.8 VM. I just tried the new Java 8 release and tried compiling with -target 1.7 -source 1.8, and the compiler refuses:

$ javac Test -source 1.8 -target 1.7
javac: source release 1.8 requires target release 1.8

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