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Collection<Process> collection = processes.values();
Iterator<Process> iter = collection.iterator();
//int i = 0;
while(iter.hasNext()){
Process process1 = iter.next();
System.out.println(process1.str+process1.height);
if(process1.height!=process.height){ //如果与执行的优先权不相等,认为是等待进程,优先权加一
pros.add(process1); //没错,就是这句抛出空指针异常
System.out.println(process1.str+"被阻塞!");
}
}