OBJECT MANAGING DEVICE AND METHOD, AND ITS PROGRAM

摘要

PROBLEM TO BE SOLVED: To execute the addition/change of a program to a system under operation. SOLUTION: The addition/change of an application program under operation of a device is made available by a class loader part 1130 for changing a method management table 1120 managed in a Java(R) virtual machine 110 to an address where an added program is arranged. When any failure occurs in the added program, the table 1120 can be restored to the original status by a means for changing it to the address before the added program is arranged. The file structure of the added program is compared with that of the already existing program by a file comparing part 1230 for checking that there is not any part subtracted from the structure of the already existing program. Thus, it is possible to check that there is not any difference between the model definitions of objects. COPYRIGHT: (C)2004,JPO