如果源代码在不同目录中编译，则编译器输出（.class 文件）会有所不同
我遇到以下问题：在编译某些类集时，如果在不同目录中执行编译，则会生成不同的 .class 文件。生成的.class文件之间的差异如下：
1）版本：
1062: aload_3
1063: invokevirtual <some_method>
1066: goto 1078
1069: astore 15
1071: aload_3
1072: invokevirtual <some_method>
1075: aload 15
1077: athrow
1078: aload_3
1079: areturn
2）版本：
1062: jsr 1076
1065: goto 1084
1068: astore 15
1070: jsr 1076
1073: aload 15
1075: athrow
1076: astore 16
1078: aload_3
1079: invokevirtual <some_method>
1082: ret 16
1084: aload_3
1085: areturn
以上代码具有相同的执行逻辑。不幸的是，我必须解释为什么编译器会这样做。奇怪的是，有时即使在同一目录、同一源中编译，连续编译之间也会出现差异（总是相同，上面提到过）。
知道会发生什么吗？ 预先感谢您的回复！
I have the following problem: While compiling some set of classes different .class files are generated if compilation was executed in different directories. The diff between generated .class files is following:
1) version:
1062: aload_3
1063: invokevirtual <some_method>
1066: goto 1078
1069: astore 15
1071: aload_3
1072: invokevirtual <some_method>
1075: aload 15
1077: athrow
1078: aload_3
1079: areturn
2) version:
1062: jsr 1076
1065: goto 1084
1068: astore 15
1070: jsr 1076
1073: aload 15
1075: athrow
1076: astore 16
1078: aload_3
1079: invokevirtual <some_method>
1082: ret 16
1084: aload_3
1085: areturn
Above code has the same execution logic. Unfortunately, I have to have explanation why the compiler behaves this way. What is strange, sometimes even when compiling in the same directory, the same sources, a difference between consecutive compilations occurs (always the same, mentioned above).
Any idea what happens?
Thanks in advance for response!
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该类是否使用任何具有包级范围的方法或类？这可以解释任何差异。
Does the class use any methods or classes which have package level scope? This could account for any differences.