java 模拟CPU系统调页，每个页面可存放10条指令，分配给一个作业的内存块为4。模拟一个作业的执行过程，该作业有320条指令，即它的地址空间为32页，采用FIFO、LRU算法，并计算缺页率-java simulation CPU system paging, each page can hold 10 instructions, the job is assigned to a memory block 4. Simulated execution of a job, the job has