这是一个
[GarbageCollectorMXBean](http://java.sun.com/javase/6/docs/api/java/lang/management/GarbageCollectorMXBean.html)用于打印GC统计信息的示例。大概您会定期调用此方法，例如使用进行调度
[ScheduledExecutorService](http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html)。
public void printGCStats() { long totalGarbageCollections = 0; long garbageCollectionTime = 0; for(GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) { long count = gc.getCollectionCount(); if(count >= 0) { totalGarbageCollections += count; } long time = gc.getCollectionTime(); if(time >= 0) { garbageCollectionTime += time; } } System.out.println("Total Garbage Collections: " + totalGarbageCollections); System.out.println("Total Garbage Collection Time (ms): " + garbageCollectionTime);}
