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Java 8 lambda 表达式字节码一致性

[英]Java 8 lambda expression bytecode consistency

原文 2016-10-16 01:08:32 8 1 java/ java-8/ bytecode/ java-bytecode-asm

I've been digging through Java lambda expression bytecode as compiled by my OpenJDK compiler, and I'm wondering, can lambda expression bytecode vary by compiler/runtime?我一直在挖掘由我的 OpenJDK 编译器编译的 Java lambda 表达式字节码，我想知道，lambda 表达式字节码是否会因编译器/运行时而异？ I'd like to know that my inspection logic will work across platforms, or not.我想知道我的检查逻辑是否可以跨平台工作。

1 个解决方案

can lambda expression bytecode vary by compiler/runtime? lambda 表达式字节码可以因编译器/运行时而异吗？

In theory yes.理论上是的。 The JLS does NOT specify that particular bytecodes / sequences must be generated. JLS 没有指定必须生成特定的字节码/序列。

You would need to check the bytecodes emitted by existing Java 8 & Java 9 compilers to see how much they differ.您需要检查现有 Java 8 和 Java 9 编译器发出的字节码，看看它们有多少不同。 (And that doesn't tell you about compilers / versions that are yet to be written!) （这并没有告诉您尚未编写的编译器/版本！）

I'd like to know that my inspection logic will work across platforms, or not.我想知道我的检查逻辑是否可以跨平台工作。

The solution should be to build a comprehensive set of test cases and run them against the code produced by all Java compilers that you want to support.解决方案应该是构建一组全面的测试用例，并针对您想要支持的所有 Java 编译器生成的代码运行它们。

In short: test it.简而言之：测试它。