「每天一道面试题」如何用代码查看JVM中堆和非堆的使用情况？

MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); System.out.println(memoryMXBean.getHeapMemoryUsage()); System.out.println(memoryMXBean.getNonHeapMemoryUsage());

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