invokeinterface b9 4: indexbyte1, indexbyte2, count, 0 objectref, [arg1, arg2, ...] → invokes an interface method on object objectref, where the interface method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2)
invokespecial b7 2: indexbyte1, indexbyte2 objectref, [arg1, arg2, ...] → invoke instance method on object objectref, where the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2)
invokestatic b8 2: indexbyte1, indexbyte2 [arg1, arg2, ...] → invoke a static method, where the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2)
invokevirtual b6 2: indexbyte1, indexbyte2 objectref, [arg1, arg2, ...] → invoke virtual method on object objectref, where the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2)
