如何从Java程序中获取JVM的最小和最大堆大小设置

最大堆大小：

Runtime.getRuntime().maxMemory();

您可能会发现一些有趣的其他计算：

Runtime runtime = Runtime.getRuntime();long maxMemory = runtime.maxMemory();long allocatedMemory = runtime.totalMemory();long freeMemory = runtime.freeMemory();long totalFreeMemory = freeMemory + (maxMemory - allocatedMemory);long usedMemory = maxMemory - totalFreeMemory;