http://en.wikipedia.org/wiki/Java_bytecode_instruction_listings 连结为java bytecode instruction listings 有个三个疑问想问: getstatic : get a static field value of a class, where the field is identified by field reference in the constant pool index (index1 << 8 + index2) 後面括号index1 << 8 + index2 是什麽意思? invokespecial : invoke instance method on object objectref, where the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) 这边的objectref 是什麽意思? 每次只要new的时候都会有这行，是什麽原因?(跟instance method的关系?) invokevirtual: invoke virtual method on object objectref, where the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) 每次call method的时候也会产生这行，连自定义的method也是(自定义的method跟 virtual method有什麽关系?) 请教大家了 --

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