hadoop计数器

context.getCounter("ssx", "demo1").increment(1);
context.getCounter("ssx", "demo2").increment(2);

CounterGroup group=  job.getCounters().getGroup("ssx");
            Iterator<Counter> iterator=  group.iterator();
            while (iterator.hasNext())
            {
                Counter counter = (Counter) iterator.next();
             System.out.println(counter.getName()+"::"+counter.getValue());
            }
            System.out.println("++++++++++++++++++++++");
            Counter counters=job.getCounters().findCounter("ssx", "demo1"); 
            long value=counters.getValue();//
            System.out.println("demo1的值"+value);