Linux和Windows java编译器是否生成相同或不同的类文件？

Question

We have Java compilation both on Linux and Windows by the same version 1.6.0_25.

For some reason the resulted class files are different. Is it correct?

Answer 1

The java compiler is not deterministic and may not generate the same .class if compiled on the same platform mulitple times or compiled on different platforms. I am trying to figure out the internals of java compiler to see why it is not deterministic.

Searching it further gives more insight while learning about cross compilation option in javac :

Cross-Compilation Options

By default, classes are compiled against the bootstrap and extension classes of the platform that javac shipped with . But javac also supports cross-compiling, where classes are compiled against a bootstrap and extension classes of a different Java platform implementation. It is important to use -bootclasspath and -extdirs when cross-compiling; see Cross-Compilation Example below.

Answer 2

Java字节码与平台无关。